symaski62

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Messages posté(e)s par symaski62

  8. Posté(e)

    https://ssd.jpl.nasa.gov/horizons.cgi

     

    Citation

    Ephemeris Type [change] : OBSERVER

    Target Body [change] : Comet C/2019 Y4 (ATLAS)

    Observer Location [change] : Sun (body center) [500@10]

    Time Span [change] : Start=2020-03-01, Stop=2020-04-06, Step=1 d

    Table Settings [change] : defaults

    Display/Output [change] : default (formatted HTML)

     

    1 mars =>  -27.7750812  km/s 

    7 mars =>  -28.3721529 

    14 mars => -29.1359632 

    21 mars => -29.9851011

    28 mars => -30.9366345

    4 avril => -32.0123282

     

    http://astro.vanbuitenen.nl/comet/2019Y4

     

    image.png.bf98d4d93da5f977fdf9475f2dbe5bd5.png

     

    image.png.58ce464bbdbf2bf094cad50b6f93bc84.png

     

    https://www.spaceweather.com/archive.php?view=1&day=05&month=04&year=2020

     

    Citation

    A COMET TALE: Comet ATLAS (C/2019 Y4) has sprung a tail--and it's impressive. "According to my observations, it is 1.2 degrees long," reports Gerald Rhemann who recorded this animation on March 27th from his backyard observatory in Eichgraben, Lower Austria:

     

    atlas_tail_strip.gif

     

    :)

     

    • J'aime 4

  22. Posté(e) · Modifié par symaski62

    http://www.aerith.net/comet/catalog/2019Y4/2019Y4.html

     

     

    mag.gif

     

      

    JPL/HORIZONS                  ATLAS (C/2019 Y4)            2020-Mar-18 21:59:13
Rec #:90004446 (+COV) Soln.date: 2020-Mar-09_07:19:55    # obs: 586 (2019-2020)
 
IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):
 
  EPOCH=  2458884.5 ! 2020-Feb-05.0000000 (TDB)    RMSW= n.a.
   EC= .9992446427560784   QR= .2528511246809229   TP= 2459000.515108983
   OM= 120.569994312319    W= 177.4078594843987    IN= 45.38173634030989
   A= 334.7437609364624    MA= 359.98132976049     ADIST= 669.2346707482438
   PER= 6124.5890168075    N= .000160929           ANGMOM= .012230574
   DAN= 284.34694          DDN= .25298             L= 298.7486958
   B= 1.8447771            MOID= .63108897         TP= 2020-May-31.0151089830
 
Comet physical (GM= km^3/s^2; RAD= km):
   GM= n.a.                RAD= n.a.
   M1=  7.7      M2=  13.9     k1=  21.5   k2=  5.      PHCOF=  .030
 
COMET comments 
1: soln ref.= JPL#4, data arc: 2019-12-28 to 2020-03-05
2: k1=21.5, k2=5., phase coef.=0.03;

     

    • J'aime 2
    • Merci 2