symaski62

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About symaski62

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    faire de la science
  1. Mauvaises nouvelles du Webb space telescope

    OUI ! octobre 2021 !
  2. http://astro.vanbuitenen.nl/comet/12 e (eccentricity) : 0.9543280 q (perihelion distance) : 0.7815230 i (inclination) : 74.09900 Ω (Longitude of ascending node) : 255.73490 ω (Argument of perihelion) : 199.02270 L (Longitude of perihelion) : 261.13099 B (Latitude of perihelion) : -18.26854 T (Time of perihelion passage) : 2460421.43590 P (Orbital period in years) : 70.78 Epoch : 2021 Jan 08
  3. étoile ALF ORI variable chute baisse

    possible variable ?? mise à jour
  4. mars 2020 rover

    mars 2020 rover Perseverance image 7680 x 4320 16/9 https://photojournal.jpl.nasa.gov/catalog/PIA24341 https://photojournal.jpl.nasa.gov/catalog/PIA24342 https://photojournal.jpl.nasa.gov/catalog/PIA24343 https://photojournal.jpl.nasa.gov/catalog/PIA24344 https://photojournal.jpl.nasa.gov/catalog/PIA24345 https://photojournal.jpl.nasa.gov/catalog/PIA24346 https://photojournal.jpl.nasa.gov/catalog/PIA24347 https://photojournal.jpl.nasa.gov/catalog/PIA24348 https://photojournal.jpl.nasa.gov/gallery/snt
  5. Exoplanètes : dernières découvertes

    salut TESS TIC 280865159 (TOI-1894) TYC 9384-1533-1 -- Star https://exofop.ipac.caltech.edu/tess/target.php?id=280865159 confirme ! Temperature (K) 5611 Radius (solar radii) 1.069 period of 739.241 days <= 739 jours ! Radius (R_Earth) 2.382593 Equilibrium (Temp K) 533.64672 Duration (hours) 18.163164 possible !
  6. comète C/2017 K2

    JPL/HORIZONS PANSTARRS (C/2017 K2) 2020-Sep-10 01:12:34 Rec #:90004318 (+COV) Soln.date: 2020-Sep-02_22:13:59 # obs: 3277 (2013-2020) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2458626.5 ! 2019-May-23.0000000 (TDB) RMSW= n.a. EC= 1.00036668185704 QR= 1.80336386311596 TP= 2459933.9075867254 OM= 88.2703559960372 W= 236.1075587592327 IN= 87.54144075815482 A= -4918.061334349277 MA= -.003736148792707402ADIST= 9.999999E99 PER= 9.999999E99 N= 2.858E-6 ANGMOM= .032672166 DAN= 8.15856 DDN= 2.31564 L= 271.9240396 B= -56.0291357 MOID= 1.09636998 TP= 2022-Dec-20.4075867254 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.3 M2= n.a. k1= 5.75 k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#48, data arc: 2013-05-12 to 2020-08-31 2: k1=5.75; mise à jour m1 = 1.0 + 5 log d + 10.0 log r (bleu) => total m1 = 6.3 + 5 log d + 5.75 log r (rouge) => noyau
  7. [topic] comete 2020 année ☄

    C/2020 P1 http://www.aerith.net/comet/catalog/2020P1/2020P1.html
  8. étoile ALF ORI variable chute baisse

    https://www.aavso.org/LCGv2/ ALF ORI 0.8 mag en cours
  9. mars 2020 rover

    https://photojournal.jpl.nasa.gov/catalog/PIA24033
  10. Nouvelle comète ! C/2020 F3

    https://www.spaceweather.com/
  11. Exoplanètes : dernières découvertes

    https://arxiv.org/abs/2007.10991 Two Directly Imaged, Wide-orbit Giant Planets around the Young, Solar Analog TYC 8998-760-1 TYC 8998-760-1 b et c
  12. Nouvelle comète ! C/2020 F3

    C/2020 F3 et Comet Hale-Bopp (1997)
  13. Nouvelle comète ! C/2020 F3

    https://www.spaceweather.com/ "This image is a stack of thirty 25s exposures at ISO1600