John Pazmino 
 NYSkies Astronomy In+c 
    The following astronomy activities in the commuting ring enclosing 
New York City are operated by various organizations. A few cultural  
tems of special importance to City astronomers are also included.  
    Altho NYC Events confirms the listed items, they are subject to 
change by their sponsors. Check with their contacts. Let the sponsor  
know that you learned of its event thru NYC Events.  
    Frequently asked questions and explanation of NYC Events is at 
    You may ask for previous NYC Events thru '' 
because only the current issue is in the website. It is replaced by  
next month's issue.  
    For events which missed NYC Events, check the NYSkies Yahoogroup 
forum. Join NYSkies by visiting '' and 
picking either the email or  website option.  
    All hours are Eastern Daylight Savings Time (UT - 4h). 

    Starting in early March 2020 the NYSkies region suffered round 
after round of event cancellations, suspensions, postponements to 
defend against diffusion of coronavirus. The events are not limited to 
astronomy. They cover all aspects of life: recreation, entertainment, 
dining, sports, education, cultural, more. 
    Home astronomy was drasticly curtailed because clubs typicly meet 
in facilities that closed doors on their own motion or by direction 
from civil authorities. 
    From March 20 to 23, NY, then NJ and CT, imposed 'stay-home' 
orders to shut down all remaining events. This essentially closed home 
astronomy activity that were bypassed in earlier facility closures. 
    NYC Events adds a new category '!!!' to flag affected events.  
It's at the bottom of the 'Events skipped ...' section. Please inquire 
at these events's contact for updates on their status. Bear in mind 
that most are under instructions rom their host venues or civil 
authorities. They may have no means to reactivate on their own. 
 General notes 
 -----------                           / 
    'whole City' means the event has no specific or dedicated place. 
It may be enjoyed from the whole NYSkies territory or at a number of 
individual places. Celestial events are typicly 'whole City' events.  
    'all day' means the event is continuous or repeating during the 
open hours of the host facility. Facilities may have limited hours per 
day or days per week. Check with the event contacts.  
    'adv regn reqd', for 'advance registration required/requested' 
means that the event requires or requests signing up before the event. 
You must have your ticket in hand at the gate. There could be a 
deadline some days before the event, after which no more signups are 
accepted. Check with the event contact for specifics. 
    Prices cited are the 'rack rate'. You could qualify for discounts 
as may be offered by the sponsor. Besides the base price there may be 
noptional extra fees to consider. 

Current Month calendar  
  Plain dates are in current month; 
  -, previous month; +, next month. 
  #, NYSkies Astronomy Seminar 
  Moon phase: .NM., .FQ), (FM), (LQ.  
  Sunset is noted for each Saturday  
 Sun   Mon   Tue   Wed   Thu   Fri   Sat  sunset 
 ---   ---   ---   ---   ---   ---   ---   ------
 -29   -30   -31    .1)    2      3#   4  19:25 
   5     6    (7)    8     9     10   11  19:32 
  12    13   (14.   15    16     17#  18  19:39 
  19    20    21   .22.   23     24   25  19:47 
  26    277   28    29   .30)    +1#  +2  19:54 

Index  of Events  / ------------- 
 * = NASA-JPL Night Sky Network affiliate  
 date = entry in 'list of events' section 
 0' = entry in 'ongoing and continuing events' section 
 'AUT'= entry in 'skipped, autumn resumption' section 
  'SPR' = entry in 'skipped, spring resumption' secrion 
  '???' = entry in 'skipped, uncertain resumption' seciton, 
  '!!!' = entry in 'skipped, suspended due to coronavirus 
 ------- -----------------------------------------------

  Astronomy on Tap  - - - - !!! 
  Canarsie line curtailment  0 
 *Floyd Bennett Field - - - !!! 
  Secret Science Club - - - !!! 

 *A S of Gtr Hartford   - - !!! 
  Astro Soc of Greenwich  - !!! 
 *Astro Soc of New Haven  - !!! 
  Bowman Observatory  - - - !!! 
 *Litchfield Hills AAC mtg  !!! 
 *Litchfield Hills lecture  !!! 
 *McCarthy Observatory  - - !!! 
  New Pond Farm - - - - - - !!! 
  Stamford Observatory  - - !!! 
 *Van Vleck Obsy (ASGH)   - !!! 
  Van Vleck Obsy (WU) - - - !!! 
  Western CT St Univ Obsy - !!! 
 *Westport Astro Soc mtg  - !!! 
 *Westport Astro Soc starvg !!! 
  Boothe Meml Astro Soc - 203-377-9933, 

 *Amateur Observers Soc - - !!! 
 *Amat Obsrs Soc starviewing!!! 
  Amer Instt Aero & Astro - !!! 
  Astro Soc of Long Island  !!! 
  Brookhaven National Lab - !!! 
  Custer Institute  - - - - !!! 
  Hofstra Univ Obsy   - - - !!! 
  Hmaptons Observatory  - - !!! 
  PubSci - - - - - - -  - - !!! 
  SUNY Stony Brook - -  - - !!! 
 *Susan Rose Observatory  - !!! 
 *Amat Astro Assn starvwg - !!! 
 *Amat Astro Assn lecture - !!! 
  Amer Instt Archarology  - !!! 
  Amer Musm Natl Hist - - - !!! 
  asteroid 1998-OR2 - - - -  1-30 
  Canarsie line curtailment  0 
  Ctr for Atmosp Ocean Sci  !!! 
  Ctr for Science & Society !!! 
  Central Pk (Great Lawn) - !!! 
 *Columbia Univ Obsy  - - - !!! 
  comet 2019-Y4 - - - - - -  1-30 
  coronavirus pandemic  - -  0 
  Earth Day fair  - - - - - !!! 
  Earth Institute - - - - - !!! 
  GC Presents - - - - - - - !!! 
  Globe at Night  - - - - - 14-23 
  Hayden Plm 'Frontiers'  - !!! 
  Hayden Plm 'Live!'  - - - !!! 
  Instt Stud Ancnt World  - !!! 
  Intrepid Museum - - - - - !!! 
 *Inwood Astronomy Project  !!! 
  Jupiter Joe's Astronomy - !!! 
  Natl Musm of Mathematics  !!! 
  NYC-H2O - - - - - - - - - !!! 
  New York Map Society  - - !!! 
  NYU Astrop & Relatvty - - !!! 
 *NYSkies Astronomy Seminar !!! 
  omega Centauri challenge   1-May 31 
  SciCafe' - - - - -  - - - !!! 
  Simons Foundation - - - - !!! 
  SpaceX NYC  - - - - - - - !!! 
 *Top of the Laawn  - - - - !!! 
  Urban Park Rangers  - - - !!! 
  WTC station closings  - -- 0 
 Ctr for Space Sci Edu - -,,  
            212-608-6164 n 

  Bear Mountain - - - - - - !!! 
  Lamont-Doherty Obsy - - - !!! 
  Mid-Hudson Astro Assn - - !!! 
  Northeast Astronomy form  !!! 
  Rockland Astro Club - - - !!! 
  Vassar College Obsy - - - !!! 
  Ward Pound Ridge  - - - - !!! 
  Westchester Amat Astro  - !!! 

  A A A of Princeton  - - - !!! 
 *Amat Astro Inc meeting  - !!! 
  *Amat Astro Inc lecture - !!!  
  A S of Toms Rv Area - - - !!! 
  McDowell Observatory  - - !!! 
  Morris Musm Astro Soc - - !!! 
  New Jersey Astro Assn - - !!! 
  North Bergen Viaduct  - -  0 
  No Jersey Astro Gp mtg  - !!! 
  No Jersey Astro Gp starvg !!! 
  Peyton Observarory  - - - !!! 
  Plasma Physics Lab  - - - !!! 
  Rutgers Univ Astro Collqm !!! 
  Rutgers Univ Astro Semnr  !!! 
 *S*T*A*R - - - - - - - - - !!! 
  Schommer Observatory  - - !!! 
 *Sheep Hill Astro Assn - - !!! 
 *Sheep Hill Observatory  - !!! 
 *Utd Astro Clubs of NJ - - !!! 
  Washington Xing St Pk - - !!! 
  WTC station closings  - -  0 
  Dark Sky Observers -  
  Montclair Telescope Club - 973-948-5284,,    
  NW Jersey Amat Astro -, 
  Passaic Co Astro Assn -, 973-523-0024 
 *Raritan Vy Co Coll Plm  -  
   Skyland Stargazers  - 

    QUEENS - QN  
  'Science on Screen'   - - !!! 
 'Space Odyssey' exhibit  - !!! 
  York College Observatory  !!! 


  Coll of Staten Is Obsy  - !!! 
  Great Kills Park  - - - - !!! 
  Staten Is Community TV  - !!! 



Ongoing and continuing events 
    all day - whole City - MH - coronavirus pandemic 
        indef duration.   Coronavirus spread rapidly thruout genral 
        population in march with ovr 800 cases in NYC by mid march 
        2020. Massive cancellations, suspensions, postponements of 
        events; closings of schools, colleges, stores, malls, sport 
        arenae, restaurants. Vulnerable people are those for saeasonal 
        flu and lung illness. Consult medical provider for specific 
        concerns and treatment. 
    all day - H&M WTC line - MH - WTC station closings 
        Thru late 2020. World Trade Center station closes every 
        weekend to repair tunnels under Hudson River ruined by 
        hurricane Sandy. Station closes at 00h on each Saturday, 
        reopens at 05h on following Monday. WTC-bound trains turn at 
        Exchange Pl station. For service to WTC, use 33 St line to 
        connect to NYC subways. 
    all day - H&M WTC line - NJ - WTC station closings 
        Thru late 2020. World Trade Center station closes every 
        weekend to repair tunnels under Hudson River ruined by 
        hurricane Sandy. Station closes at 00h on each Saturday, 
        reopens at 05h on following Monday. WTC-bound trains turn at 
        Exchange Pl station. For service to WTC, use 33 St line to 
        connect to NYC subways. 
    all day - North Brgen Viaduct - NJ - road closings and rebuild 
        Thru end 2020.  One lane in each direction is closed during 
        major rebuild of viaduct on NJ495 between NJ Tpk and Lincoln 
        Tnl. Buses have priority on remaining lanes. On-off ramps for 
        local street close from time to time. 
    all day - Canarsie line - MH - night and weekend slowdown 
        Thru mid 2020. Curtailed service  20h to 05h daily and 20h 
        Fri-05h Mon on  weekends. Trains run single-track thru one 
        tunnel between Bedford Av statio aand 8th Av terminal. Round-
        trip takes about 20 minutes. Other track and tunnel are 
        closed. Service may change according as progress of work. 
        Normal two-way service runs 05h-20h on weekdays. 
    all day - Canarsie line - BK - night and weekend slowdown 
        Thru mid 2020. Curtailed service  20h to 05h daily and 20h 
        Fri-05h Mon on  weekends. Trains run single-track thru one 
        tunnel between Bedford Av statio aand 8th Av terminal. Round-
        trip takes about 20 minutes. Other track and tunnel are 
        closed. Service may change according as progress of work. 
        Normal two-way service runs 05h-20h on weekdays. 

List of Events 
Wed  1 Apr 
    all day - whole City - MH - asteroid 1998-OR2 flyby 
        Thru April 30. Asteroid 1998-OR2, #52768, flies by to Earth on 
        April 29, 0.04 AU, ~6 million km. 10-20 km estd diam. App 
        magn at proximity ~8.8. Path from Gem, Cnc, Hya, Crt, Cen, to 
       south horizon. proximity is low in south, requiring extra 
        observing skills and cler sky. Orbit elements from JPL 
--- epoch         | 2020 may 31.0   || inclination | 5.86588 deg 
    excenty      | 0.57308          || lon asc node | 27.01547 deg 
    semimaj axis | 2.38444 AU       || arg perih    | 174.56620 deg 
    mean anomy   | 12.10139 deg    || perihelion    | 1.01595 AU 
    perih date   | 2020 Aor 15.7926 ||  mean motn   | 0.26769 deg/day 
    period       | 1344.85808 day   || apohelion    | 3.75902 AU 
    Tesserand-J  | 3.286            | orbit prox    | 0.015438  AU 
    all dau - whole City - MH - bright comet 2019-Y4 
        thru April 30. Bright comet 2019-Y4 (ATLAS) is binocular, 
        maybe bare-eye, target. Path from UMa, Lyn Cam, Per, Tau, to 
        west twilight. Perihelion comes in daylight. Orbit elements 
        from JPL 
    epoch        | 2020 May 31.0   || excenty     0.99925 
    semimaj axis | 334.74376 AU    || perihelion  2.52851 AU 
    inclination  | 45.38174 deg    || asc node   | 120.57000  deg 
    arg perih    | 177.40786 deg   || mean anomy | 359..98133 deg 
    perih date  | 2020 May 31.0151 || peeriod    | 2237006.0761 day 
    mean motn   | 0.00016 deg/day  || apohelion  | 669.23467 AU 
    Tesserand-J | 0.453            || orbit prox | 0.63109 AU 
    00:00 - whole City - MH - omega Centauri challenge 
        Thru 31 May. When cluster ome Cen, NGC5128, is on meridian 
        it's about 1 deg alt, yet is observable from within NYC. 
        Requires good observing skills, dark sky, clear horizon. 

Tue 14 Apr 
    20:30 - whole CIty - MH - Globe at Night exercise 
        Thru April 23. NYSkies runs its own Globe at Night exercise in 
        2019-2020 while Orion is in sky at nighfall. Same method and 
        procedure as for prior years for documenting sky transparency 
        over City. Details at 

Events Skipped This Month 
    all day - whole City - MH - clearsky starviewing  
        Amat Astro Assn. Sessions convene in parks usually at dusk. 
        Occasional daytime sunviewing. Free. Cancelled for clouds. 
, 718-522-5014,  
    all day - Musm Moving Imnage - QN - '2oo1:' exhinit 
        Thru Jul 18. 36-01 35 Av (Astoria). '2001: A space odyssey'. 
        Props, customes, models, A/V sorts, ephemridalia, posters. 
        Certain days show '2001: A space odyssey' film. $15 adm, $25 
        adm  +film., 718-777-6888. 
    all day - Amer Musm Natl Hist - MH - 'Nature of color' exhibit 
        Thru 2021 august. 4th floor. Explore light, wavelength, 
        vision, pigments, radiation, sprctra. $28 adm & exh. 
    all day - whole City - MH - cultural tour 
        NYC-H2O. Walk, bike, ride thru history and culture of NYC 
        muwater system facilities and natural waterways in and near 
        the City.  Events are pay orfree, adn regn reqd. Bike tours 
        need own bike., 
     all day - whole island - LI - clearsky starviewing  
        Amat Obsrs Soc. Sessions convene in parks usually at dusk. 
        Occasional daytime sunviewing. Free. Cancelled for clouds. , 
    all day - whole City - MH - clearsky starviewing  
        Jupiter Joe's Sidewalk Astronomy. Sessions convene in parks 
        usually at dusk. Occasional daytime sunviewing. Free. `       
        Cancelled for clouds., 
    all day - whole City - MH - cultural tours & lectures 
        Urban Park Rangers. Tours of parks, landmarks, nabes, hoods. 
        Lectures on history and culture of NYC. Program varies each 
        month. Free.  
    09:00 - Suffern - NY - Northeast Astronomy Forum 
        VISIT THE NYSkies BOOTH 
        Thru Sun 5 Apr. Rockland Astro Club. SUNY Rockland Coll. 
        Vendors, dealers, exhibits, demos, talks, food service. $27 =         
1-day, $46 2-day. 
 = = = = = 
    10:00 - Princeton - NJ - science tour 
        Plasma Physics Lab. Walk thru history and culture of fproject 
        to capture energy from controled hydrogen fusion. Free, adv 
        regn reqd. Have GI photo ID for campus security.  
 = = = = = 
    10:30 - Piscataway - NJ - astronomy lecture 
         Colloquium series. Rutgers Univ, Busch Campus, Astro & Phys 
        Lecture Hall. Free., 
 = = = = = 
    12:00 - Union Square - MH - Earth Day exhibition 
        VISIT THE NYSkirs BOOTH 
        North flank of park. Exhibit booths in tent city, music, 
        performnaces, demos, crafts, takeaways, food service. 
 = = = = = 
    13:15 - Uniondale - LI - Amat Obsrs Soc meeting. 
        Hofstra Univ, Berliner Hall. Free., 
 = = = = = 
    13:30 - Piscataway - NJ - astronomy lecture 
        Seminar series. Rutgers Univ, Serin W330. Free. 732-445-3974, 
 = = = = = 
    14:00 - Avenues HQ - MH - New York Map Society lecture 
         11 E 26 St, 17th floor. Various topics about map making, 
        cartography, geography.  Free, adv regn reqd. Have GI photo ID 
         for caampus security., 
    14:00 - New York University - MH - astronomy lecture 
        726 Broadway, Rm 940. Various topics in astrophys and 
        relativity. Free. Have GI photo ID for campus security. 
 = = = = = 
    15:30 - Greenwich - CT - Astro Soc of Greenwich meeting 
        Greenwich Audubon Center. Free., 
    15:30 - Courant Institute - MH - science lecture 
        Ctr for Atmosp & Ocean Studies. Weaver Hall, 251 Mercer 
        St. Various topics in geophysics and earth science. Free., 
    15:30 - Upton - LI - Summer Sundays science show 
        Brookhaven Natl Lab. Small seminar room. 'What is the Higgs 
        boson hiding?'. Free, have GI photo ID for campussecurity. 
        631- 344-2651, 
 = = = = = 
     16:00 - Natl Musm of Mathematics - MH - science show 
        Also 19:00. 'Mathematical Encounters'. Free, adv regn 
        reqd. 212-542-0566,, 
 = = = = = 
    16:15 - Simons Foundation - MH - scinece lecture 
        160 5 Av & 21 St. 'The quest for the ideal glass'. Tea 16:15, 
        lecture 17:00. Free, adv regn reqd. 646-654-0066, 
 = = = = = 
    17:00 - Danbury - CT - astronomy lecture 
        Westn Conn St Uv, Obsy/Plm. Indoor planetarium show, 
        clearsky starviewing. Free., 
    17:30 - Intrepid Museum - MH - Free Friday show 
        Pier 86 and ship. Exhibits, demos, talks. Clearsky movies 
        and starviewing. Free. 
 = = = = = 
    18:00 - Earth Institute - MH - science lecture 
        Columbnia Univ, Lerner Hall, Arledge Audm.. 'Sea level rise: 
        Causes, impacts and options for solutions'. Free, adv regn 
    18:00 - Inst Stud Anc World - MH - cultural lecruee 
        15 E 84 St, 5/Madison Av. Various topics on history and 
        culture of ancient societies. Free, adv regn reqd.,, 212-992-7800 
    18:00 - Bethpage - LI -  Amer Instt Aero & Astro lecture       
        Hofstra Univ, Breslin Hall, rm216 . Various topics in 
        aeronautics and astronautics. 'Observations from the 
        Apollo LM to the Shuttlre and ISS, and beyond'. Free, $7 opt 
        pizza-soda, adv regn reqd.718-812-2727, 
    18:00 - Shalel Lounge - MH - SpaceX NYC meeting 
        65 W 70 St, Amsterdam Av. Fiscussion on space industry and 
        development. Free, opt meal/drink. 
    18;00 - Musm Moving Imnage - QN - 'Science on screen' cinema 
        36-01 35 Av (Astoria). 'Women on the Moon'. $15., 718-777-6888. 
    18:00 - Palisades - NY - science lecture 
        Lamont-Doherty Earth Obsy, Monell audm. 'Climate, carbon ```      
`       dioxide, and sea level: Past is prologue'. Free, 
         845-365-8634,, 845-365-8988 
    18:00 - Amagansett - LI - astronomy lecture 
        Montauk Obsy. Amagansett Library. Indoor talk, clearsky 
         sunviewing. Free. 
    18:00 - Columbia University- MH - Ctr for Sci and Soc lecture 
        Fauerweather Hsll, Rm 513. 'The triumph of scientific 
        imagination, 1760-1900'. Free, 
        adv regn reqd. 212-854-7211, 
 = = = = = 
    18:15 - Amer Musm Natl Hist - MH - Amat Astro Assn lecture 
         Kaufmann Theater. Free, no musm adm fee. 718-522-5014, , 
 = = = = = 
    18:30 - Hunter College - MH - Amer Instt Archaeolgy lecture 
        Hemmerdinger Screening Room. Various topics on archaeology and 
        anthropology. Free, adv regn reqd. GI photo ID required for 
        campus security., 
    18:30 - CUNY Graduate Center - MH -'GC presents' lecture 
        365 5 Av & 34 St. 'Climate change:The effects on coastal 
        environments''. Free, adv regn reqd. 212-817-7000,  
 = = = = = 
     19:00 - Toms River - NJ - Astro Soc of Toms Rv Area meeting 
        Ocean Co Coll, Novins Planetarium. Free., 732-255-0343, 
    19:00 - lyndhurst - NJ - clearsky starviewing 
        Ctr for Enviro & Sci Edu, McDowell Obsy. Free. cancelled 
        for clouds. Requires climbing narrow spiral stairs into domw.,, 201-460-1700 
    19:00 - Patchoque - LI- PubSci show 
        Brookhaven Natl Lab, Blue Point Brewing Co, 225 W Main St. 
        'The quantum revolution'. Free, opt meal/drink. 
     19:00 - Uniondale - LI - clearsky starviewing 
        Hofstra University,Berliner Bdg, Rm 117. Free, 
        adv regn reqd. Cancelled for clouds. 516-463-2759,, 
    19:00 - Hayden Planetarium - MH - 'Astronomy live!' lecture 
       Live narrated planetarium show. Enter at 81 St/Cntl Pk W. 
       $15, adv regn reqd. 212-769-5100,  
    19:00 - Hayden Planetarium - MH - 'Frontiers' lecture 
         Kayfnamm Thtr. Enter at 81 St/Cntl Pk W. $15, adv regn reqd. 
    19:00 - West Reading - CT - clearsky starviewing 
        New Pond Farm, obseratory. $10, adv regn reqd. cancelled for 
        clouds., 203-938-2117 
    19:00 - Amer Musm Natl Hist - MH - SciCafe' show 
        Hall of Ocean Life or hall of planet Earth. Music, drinks, 
         chat with Museum scientists. Free, be 21 or be gone. GI photo 
        ID reqd. 212-769-5100, 
 = = = = = 
    19:15 - Lk Taghkanic St Pk - NY - clearsky starviewing 
        Mid-Hudson Astro Assn. West Beach parking lot. Free,  
        cancelled for clouds. Adv regn reqd with vehicle make, 
        model, plate number for park security. `       
 = = = = = 
    19:30 - Boonton - NJ - Sheep Hill Astro Assn meeting  
        Boonton Senior Ctr. Free.,, 
    19:30 - Princeton - NJ - Amat Astro Assn of Princeton meeting 
        Princeton U, Peyton Hall. Free., 
    19:30 - Torrington - CT - Litchfield Hills Amat Astro Club mtg 
        Central Congregational Church. Free., 
    19:30 - Staten Is Community TV - SI - science show 
        100 Cable Way, Mariners Hr SI. 'Geology forum' Live audience, 
        seating at 19:30, on air at 20:00. Free., 
    19:30 - Morristown - NJ - Morris Museum Astro Soc meeting  
        Morris Museum. Free. 973-386-1848, 973-386-1848,,,, 
    19:30 - Suffern - NY - RRockland Astronomy club meeting 
        Rockalnd Commty Coll, main bldg. Free. 
    19:30 - Stony Brook - LI - astronomy lecture                     
        SUNY Stony Brook, Earth & Spc Sci Hall. Indoor lecture, 
        clearsky starviewing. Free., 
    19:30 - Pleasantville - NY - Westchester Amat Astro meeting  
        Pace Univ, Lienhard Hall, Free.   ,  Sat  8 Feb 
    19:30 - Cranford - NJ - Amat Astro Inc meeting 
        Union Co Coll, Sperry Obsy. Indoor talk, clearsky  
        starviewing. Free. 
    19:30 - New Brittain - CT - Astro Soc of Gtr Hartford meeting 
        Central CT St Univ, Copernicus Plm. Free., 
    19:30 - New Haven - CT - Astro Soc of New Haven meetinG 
        Yale Univ, Leitner Family Obsy. Indoor talk, clearsky 
        starviewing. Free., 
 = = = = = 
     20:00 - Litchfield - CT - Litchfield Hills A A C lecture 
        White Meml Consrvn Ctr. Free. Indoor lecture, clearsky 
    20:00 - Inwood Hill Park - MH cleasky starviewing 
        Inwood Astronomy Project. Meet at park entrance, Seaman Av 
        & Isham St. Free. Cancelled for clouds. 917-529-2359 , 
    20:00 - Floyd Bennett Field - BK - clearsky starviewing 
        Community Garden. NYSKies & Natl Park Svc. Free. Cancelled 
        for clouds.,, 
    20:00 - Boonton - NJ - clearsky starviewing  
        Sheep Hill Astro Assn Obsy, Free. Cancelled for  
        clouds. sheephillastro.otg,, 
   20:00 - Greenwich - CT - clearsky starviewing 
        Astro Soc of Greenwich. Curtis Elem Schl, Bowman Obsy. Free. 
        Cancelled for clouds., 203-415-6762. , 
   20:00 - Princeton - NJ - clearsky starviewing 
        Princeton Univ, Peyton Hall. Free. Cancelled for clouds,, 
    20:00 - Columbia University - MH - astronomy lecture 
          Pupin Hall, signs to lecture room. Indoor lecture, clearsky 
         starviewing. Free., , 212-854-3278 
   20:00 - Coll of Staten Is - SI - clearsky starviewing 
        Astrophys Obsy. Free, cancelled for clouds. 718-982-2818,, 718-892-3259, 
    20:00 - Middletown - CT - clearsky starviewing 
        Astro Soc of Gtr Hartford, Wesleyan U, Van Vleck Obsy. Free. 
        cancelled for clouds., 860-872-9069, 
    20:00 - Westport - CT - Westport Astro Soc meeting 
        Rolnick Obsy. Free., 203-227-0925 
    20:00 - Westport - CT - clearsky starviewing 
        Westport Astro Soc. Rolnick Obsy.  Free. Cancelled for clouds., 203-227-0925 
    20:00 - Lincroft - NJ - S*T*A*R meeting 
        Brookdale Commty Coll, Mommouth Museum. Free., 
    20:00 - Centerport - LI - Astro Soc of LI meeting 
        Vanderbilt Plm. Free., 
    20:00 - Jenny Jump St Forest - NJ - Utd A C of NJ mtg 
        UACNJ Obsy. Indoor talk, clearsky starviewing. Free.  
    20:00 - York College - QN - astronomy lecture . 
        Core Academic Bdg, Rm AC-2E01. Indoor lecture, clearsky 
        starviewing. Free, adv regn reqd. 718-262-2082,, 
    20:00 - Cranford - NJ - Amat Astro Inc lecture 
         Union Co Coll, Smith Audm. Indoor talk, clearsky 
        starviewing. Free. 
    20;00 - Wash'n X'ing - NJ - clearsky starviewing 
        Amat Astro Assn of Princeton. Simpson Obsy. Free, cancelled 
       for clouds., 609-737-2575, 
    20:00 - Ward Pound Ridge - NY - clearsky starviewing 
        Westchester Amat Astro. Meadows Picnic Area. Free. Cancelled 
        for clouds., 
    20:00 - Way Station Pub - BK - Astronomy on Tap meting 
        683 Washington Av & Prospect Pl (Prospect Hts). Informal 
        astronomy discussion in pub setting. Free, one drink purchase 
    19:30 - Great Kills Pk - SI - clearsky starviewing 
        Natl Pk Svc. Enter at Hylan Bv to playground; Free. Cancelled 
        for clouds., 718-987-6790  n 
    20:00 - Bear Mountain - NY - clearsky starviewing 
        Rockland Astro Club. Anthony Wayne Rec Area, picnic field. 
        Free, cancelled for clouds. 
    20:00 - Southold - LI - Custer Institute meeting 
        Custer Instt. Indoor program, clearsky starviewing. $5-$15. 
        Varies with program.,, 631-765-2626  
    20:00 - Susan Rose Obsy - LI - clearsky starviewing  
        Amat Obsrs Soc. capus of Custer Institt. Sessions concurrent 
        with Custer's own events. Free, cancelled for clouds.,             
      20:00 - Upper Montclair - NJ - clearsky starviewing 
        No Jersey Astro Gp. Montclair St Univ, Richardson Hall. 
        Free, cancelled for clouds., 973-655-7266 
    20:00 - Upper Montclair - NJ - No Jersey Astro Gp meeting 
        Montclair St Univ, Richardson Hall, Room 232. Free., 973-655-7266 jjj 
    20:00 - Central Park - MH - clearsky starviewing 
        Top of the Lawn. North path of Great Lawn. Free. Cancelled for 
    20:00 - Bell House - BK - Secret Science Club meeting  
        149 7 St, 2/3 Av. Lecture and music on various science  
        topics. Free., 718-638-4400, 
    20:00 - Stamford - CT - astronomy lecture 
        Stamford Obsy. $5. Indoor lecture, clearsky starviewing. 
        starviewing also called off for outdoor temp < -6C. 
    20:00 - New Milford - CT - astronomy lecture  
        McCarthy Obsy, New Miford HS. Indoor lecture, clearsky  
        starviewing. Free., 860-354-1595, 
    20:00 - Middletown - CT - clearsky starviewing 
        Wesleyan U, Van Vleck Obsy. Free, cancelled for clouds. 
 = = = = = 
    20:30 - Voorhees St Pk - NJ - NJ Astro Assn meeting 
        NJAA-HQ, Robinson Obsy. Indoor lecture, clearsky 
        starviewing. Free., 908-368-8500 
    20:30 - Piscataway - NJ - clearsky starviewng 
        Rutgers Univ, Schommer Obsy. Free. Cancelled for clouds.  
 = = = = = 
    21:00 - Poughkeepsie - NY - clearsky starviewing 
        Vassar College, Observatory. Free. Cancelled for clouds., 

General news 
    This April 2020 NYC Events shows the catastrophic collapse of home 
astronomy in the NYSkies region precipitated by concerns about the 
/coronavirus. Starting in early March, event after event was called off 
for the rest of March and later. At first here were occasional 
cancellations but the pace ramped up rapidly during the month. 
    Most home astronomy events were shut down when their host venue 
closed the premises. NYSkies cancelled its march 20 Seminar when host 
McBurney House closed on March 16 due to cornnavirus. 
    In some cases the host closing was part of a general civil order to 
suspend large gatherings, like meetings, lectures, exhibitions, 
    On March 20 NYS Gov Cuomo put out a stay-home order. All remAining 
open public activities, businesses, gatherings thruout the state must 
close down. Certain businesses  with survival products and services 
are exempt. order went into force on the 23ed but most stores and 
services were closing sown during rest of the 20th. 
    NJ Gov Murphy on March 21 ordered all nonessential operations and 
gatherings in state to cease. Order took effect on March 22. Events 
bypassed by earlier restrictions were then closed down. 
    CT Gov Lamonr ordered on March 22 all nonessential operations and 
gatherings in state to cease. Order took effect on the 23rd. All 
previously scheduled events were closed. 
    I dropped the entry for the measles epidemic. it seems to be under 
control and is now totally supplanted by the coronavirus pandemic. 

City News 
    On March 1 NYC Dept of Health reported first known NYC case of 
Coronavirus. A manhattan woman returning from health service in Iran 
developed the disease and is confined to her home for the duration. 
She is under general virus treatment and, as at early March, is 
    many airlines on March 1 posted flight restrictions to cities and 
countries with significant coronavirus cases.Discuss with your airline 
for alternate plans if you were going to infected places. 
    First death in NYC  associated with coronavirus reported on March 
14. Un-IDed 82YO woman went to hospital for other medical conditions 
and was found to have the virus. 
    By March 27 NYC recorded about 25,000 coronavirus cases with about 
250 deaths. Mortality rate is quite 1% due to better reporting and 
testing of virus patients and is consistent with previous flu-ike 
infections. Both cases and deaths are expected to continue rising in 
    On Mar 7 NYS Gov Cuomo declared state of emergency, letting  for 
coronavirus. This lets state/local agencies impose rules to combat the 
disease without normal review and approval process. 
    NY State on March 9 became the most coronavirus-infected state in 
US when cases grew to 1,30. Most are in NYSkies region! Fatality rate 
subsided, likely from public awareness and quicker medical  treatment. 
    The United Nations closed its Manhattan campus on March 10 from 
coronavirus. All assemblies, meetings, conferences, visitor services, 
tours are called off. UN delegates and staff conduct business remotely 
by telcomms with restrained face-to-face dialog. Pavilions remain 
softly illuminated at night but all gates are locked. 
    NYskies Astronomy Seminar on mar 6 examined blackbody radiation. 
We learned how duCahtelet found common features of light and heat in 
1740s and how Fraunhofer sketched a brightness profile for the Sun's 
spectrum. We saw early efforts to explain radiation from heated 
objects. The specimina were sooted over to remove surface effects, 
giving the term 'blackbody'. There was no success under 1880s-1890s 
physics. Planck in 1900 developed the quantum theory that fully 
described blackbody radiation and binded energy, wavelength, and 
frequency together. As industry and science explored various zones of 
radiation, preference for one or an other parameter grew. We today use 
that from legacy, career, habit. Optical radiation is usually worked 
in wavelength, radio waves in frequency, UV and x-ray in energy. We 
saw that in everyday life we experience quantization with electricity. 
Altho we use electricity as a bulk or mass flow of energy, we know it 
is a flow of electrons. The energy flow is the 'strength' of 
electricity times the electricity current, (energy/electron) * ( 
electron/second). Planck explained the blackbody radiation as 
(energy/quantum)*(quantum/second). He added in functions of 
temperature and wavelength to properly duplicate the blackbody energy 
profile. We compared the sun and star energy profile with blackbody 
curves, seeing that these objects radiate from their temperature. The 
realization that temperature is the driving force of a star's radiant 
energy firmed up the spectral classes in the alphabet sequence 
'OBAFGKM', from hot to cool. We saw in star spectra how the line 
structure changed with temperature. Each temperature excite star's 
atoms to yield sets of line indicative of that temperature. We learned 
that Planck radiation comes with two simple formulae, Wien and stefan-
Boltzmann. The former relates the wavelength of maximum energy, the 
crest or peak of the radiation profile, to temperature. This method 
works for stars with clean profiles, not cut up with spectral lines. 
The latter relates the total energy from a blackbody with temperature. 
This is a strong power function such that hotter object radiate more 
strongly than cooler ones. From the S-B formula we learned how to 
estimate the size of stars. We stepped thru the procedure. From the 
star distance and received illumination we work out the emitted 
limination by the inverse square law. From he spectrum, thru its lines 
or blackbody profile, we get the temperature. Putting the radiation 
and temperature in the S-B formula yields the surface  area of the 
star Area is the square of the radius or diameter. We checked this 
with an HR Diagram. Stars in the lower left are hot but dim. These 
have small areas to radiate little energy and are the 'dwarf' stars. 
stars in the upper right are cool but brilliant. They put out little 
energy and need large area to produce the high luminance. These stars 
are large, 'giants' and 'supergiants'/ We examined illustrations of 
dwarfs and giants and one of Betelgeuse. That star, by direct imaging, 
is about as big as the orbit of Jupiter! We winded down with pictures 
of various blackbody objects, such as humans and planet Earth, and the 
cosmic microwave radiation. This is the first radiation to travel thru 
space after the bigbang and is almost a precisely perfect blackbody. 
it started around 300,000 years after the bigbang with 3,000K 
temperature. On its way to Earth for 13 billion years it was stretched 
with Hubble expansion to the 3K we observe today. We looked at a major 
booboo in astronomy. We observe almost entirely in optical 
wavelengths, yet stars send out energy in all wavelengths. We 
compensate for this missing energy with a bolometric correction or 
fluff factor. But we routinely apply the radiation formulae to just 
the iptical portion of the blackbody profile. We saw how blackbody 
curves are unique for each temperature such that knowing any two 
points on one fixes its temperature. We do this by imaging the source 
in a blue and visual band and comparing the two reading with standard 
Planck profiles to get the source temperature. Takeawys were 
fistorical illustrations of radiation, Planck quantum formula, 
blackbody formulae, example blackbody profiles, sample spectra, 
skeleton HRD, illustrations of star size, color index and bolometric 
correction diagram, example blackbody radiation sources. 
     NYC Sci & Rngg fair on mar 8 was decimated by superimposed 
causes.. About half of fair crew, Citi Field staff, judges were absent 
from coronavirus concerns, missing start of  Daylight Savings Time, 
closure of field's train station for track work. Many students missed 
fair because their schools were closed from virus infection. Judges 
were assigned up to ten projects to cover the shortfall. Public 
viewing of exhibits was cancelled on the spot.
    NYSkies Astronomy Seminar for March 20 was cancelled because 
McBurney House, where we meet, shut down on march 16 for coronavirus 
concerns. Topic was a preview of the spring stars over the City. This 
can be handled in April if meetings are resumed then. 

Sky News
    March 2020 was a poorer month for stargazing with most nights 
clouded or hazed over. Globe at Night, mar 14-24 recorded mostly 
cloudy skies. This frustrated GaN observers who wanted to capture 
effect of coronavirus closings on sky transparency. On the few clear 
nights many observers did note the sky was darker with more dim stars. 
    Several observers noticed the Moon on Feb 29 looked ragged. Outer 
edge of her crescent was smooth and round, being the limb. Inner edge, 
terminator, by eye was rough. Binoculars revealed terminator had 
seemingly extra relief than normal. 
    Recent comet 2019-Y4, ATLAS, may be a bright eVening comet in 
April. It is in high sky at nightfall, then rounds perihelion on May 
31 in daylight. It'll be a binocular feature and perhaps rising into 
bare-eye view. See April 1st. 
    Earth Hour in NYSkies was clouded out. Some parts of region had 
light rain. Observers noted that, on the clouds, there were no 
hotspots over nearby business/retail districts! Outdoor lighting was 
already drasticly reduced by the stay-home orders of NY, NJ, CT, with 
little practical further reduction. 
    Some observers got their first good sight of Mars in predawn of 
March 18. He was in convention with Jupiter and Moon.  On days before 
and after the 18th Jupiter and mars were in conjunction with Moon well 
away from them. Due to erratic cloudy weather most observers got just 
one view. 
    Asteroid 1998-OR2, #52768, passes close to Earth on April 29 at ~6 
million km near its opposition. Altho some asteroid flybys occur in 
April 2020 this one is by a extra large rock. Diameter is 10-20 km 
diameter.  52768 stays dim, requiring good observing skill and mid-
size scope. Proximity occurs when asteroid is leaving view beyond 
south horizon. See April 1. 
    During the stay-home period in NYSkies observers remarked on the 
absence of glow-domes above nearby retail/business districts. When 
stores and offices were shut down, they turned off most of their 
outdoor lighting. On the few clear nights the sky had substantially 
more stars than normal for the same weather conditions.
    NYSkiers missed the First Crescent of Nisaan on March 25. Sky was 
cloudy. 14 days later, Nisan 15, is  Full Moon and Passover. Easter is 
the Sunday after this Full Moon, April 12.