symaski62

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About symaski62

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    faire de la science
  1. TNO, KBO, SDO & Co.

    (385446) Manwë-Thorondor diameter 190 km https://arxiv.org/abs/1911.08546
  2. KIC 8462852 (Tabby's Star) pour TESS

    WOW ! TIC 185336364 Sector 15
  3. C/2019 Q4 (Borisov) = 2I/Borisov https://www.projectpluto.com/temp/gb00234.htm q 2.008367322 +/- 0.00303 e 3.36398165 +/- 0.0139 461 of 577 observations 2019 Aug. 30-Sept. 24; mean residual 0".550 https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C%2F2019 Q4;old=0;orb=1;cov=0;log=0;cad=0#orb q 1.99717336375388 e 3.314321521681457 first obs. used 2019-08-30, last obs. used 2019-09-27 http://www.minorplanetcenter.net/db_search/show_object?utf8=✓&object_id=C%2F2019+Q4 eccentricity 3.3835756 perihelion distance (AU) 2.0126273 574 total observations over interval: 2019 08 30.04398 – 2019 09 24.14251 loin eccentricity 3.31 à 3.38 🤔 moyen 3.345
  4. Sonde JUNO : destination Jupiter

    https://photojournal.jpl.nasa.gov/catalog/PIA23437
  5. Exoplanètes : dernières découvertes

    https://arxiv.org/abs/1909.09158 Searching for a cometary belt around Trappist-1 with ALMA
  6. (mise à jour) MPC (IAU) 447 total observations over interval: 2019 08 30.04398 – 2019 09 20.166194 eccentricity 3.3892848 perihelion distance (AU) 2.0140361 ----------------------------------- JPL first obs. used 2019-08-30 last obs. used 2019-09-20 eccentricity 3.445224326645891 perihelion distance (AU) 2.027619646107458 ---------------------------------- moyen eccentricity 3.41 perihelion distance (AU) 2.0205
  7. KIC 8462852 (Tabby's Star) pour TESS

    TIC 185336364 Sector 14
  8. mise à jour IAU MPC 305 total observations over interval: 2019 08 30.04398 – 2019 09 16.18422 eccentricity 3.4315836 perihelion distance (AU) 2.0244417 ------------------------- JPL first obs. used 2019-08-30 last obs. used 2019-09-16 eccentricity 3.671315408428195 perihelion distance (AU) 2.078691392377223
  9. comète C/2017 K2

    mise à jour M1= 6. M2= n.a. k1= 6. k2= n.a. PHCOF= n.a. m1 = 1.0 + 5 log d + 10.0 log r (bleu) => total m1 = 6 + 5 log d + 6 log r (rouge) => noyau
  10. https://www.projectpluto.com/temp/gb00234.htm OOOF calculer simulation ? Orbital elements: C/2019 Q4 Perihelion 2019 Dec 7.523918 +/- 0.49 TT = 12:34:26 (JD 2458825.023918) Epoch 2019 Sep 13.0 TT = JDT 2458739.5 Ju: 0.8486 Gray q 2.0497402180 +/- 0.0209 (J2000 ecliptic) M(N) 10.6 K 10.0 Peri. 208.1472783 +/- 0.43 Node 308.5238180 +/- 0.18 e 3.538778351 +/- 0.0973 Incl. 43.6690557 +/- 0.18 204 of 226 observations 2019 Aug. 30-Sept. 13; mean residual 0".566
  11. http://www.minorplanetcenter.net/db_search/show_object?utf8=✓&object_id=C%2F2019+Q4 eccentricity => 3.2078726 perihelion distance (AU) => 1.9715486 https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=C%2F2019 Q4;old=0;orb=1;cov=0;log=0;cad=0#orb eccentricity => 3.70429496893662 perihelion distance (AU) => 2.08596458569878 calculer simulation ? IAU vs JPL
  12. TNO, KBO, SDO & Co.

    https://arxiv.org/abs/1908.10286 A Dearth of Small Members in the Haumea Family Revealed by the OSSOS Survey 2013 UQ15
  13. https://arxiv.org/abs/1907.10077 Active asteroid (6478) Gault: a blue Q-type surface below the dust ? quoi ?
  14. https://www.aavso.org/aavso-alert-notice-672 TIC 185336364 => KIC 8462852 (Tabby's Star) https://exofop.ipac.caltech.edu/tess/target.php?id=185336364