symaski62

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Everything posted by symaski62

  1. Trous noirs : bientôt la première image !!

    M87 paramètres
  2. Trous noirs : bientôt la première image !!

    https://iopscience.iop.org/journal/2041-8205 L1 = First M87 Event Horizon Telescope Results. I. M87 = oui L2 = First M87 Event Horizon Telescope Results. II. M87 = oui Sgr A = oui L3 = First M87 Event Horizon Telescope Results. III. M87 = oui 3C 279 = oui L4 = First M87 Event Horizon Telescope Results. IV. M87 = oui 3C 279 = oui L5 = First M87 Event Horizon Telescope Results. V. M87 = oui @jackbauer 2 voilà !
  3. Falcon Heavy - Arabsat 6A 18:36 EDT // 22:36 UTC, April 10th 2019 update
  4. Falcon Heavy Boosters Mated Together (timelapse)
  5. Falcon Heavy - Arabsat 6A 18:36 EDT // 22:36 UTC, April 9th 2019 update !
  6. 18h00 CET TEST fire confirmed !
  7. Exoplanètes : dernières découvertes

    https://www.eso.org/public/archives/releases/sciencepapers/eso1905/eso1905a.pdf (anglais) HR 8799 e spectral type : L7 brown dwarf The spectrum, with a signal-to-noise ratio of ≈5 per spectral channel, is compatible with a late-type L brown dwarf With a reduced χ ² of 2.4, the best fit indicates a spectral type close to L7 BD to estimate the orbital parameters and find a semimajor axis of 16.4 (+2.1/−1.1) AU, an eccentricity of 0.15 (± 0.08), and an inclination of 25° (± 8)° . temperature of 1150 ±50 K surface gravity of 10 4.3 (±0.3) cm s² radius of 1.17 (+0.13/−0.11) RJup mass of 10 (+7/−4) MJup exit: wow ! L7 brown dwarf à HR 8799 e ✨
  8. 1) 31/3/2019 => test par Falcon Heavy 2) 7/4/2019 23h36 CET à 1h35 CET (2 heures) voilà !
  9. https://arxiv.org/abs/1903.09943 voilà ! 2 queues par Gault
  10. bonjour Arabsat-6A 7 avril 2019 23h36 CET
  11. TNO, KBO, SDO & Co.

    salut https://arxiv.org/abs/1903.05439 The mass and density of the dwarf planet (225088) 2007 OR10
  12. https://arxiv.org/abs/1903.05320 https://arxiv.org/pdf/1903.05320.pdf WTF ! 25/11/2018 comète Asteroid (6478) Gault
  13. Distance selon parallaxe …

    http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%408399845&Name=* alf CMa&submit=submit * alf CMa -- Double or multiple star (non Gaia DR2) http://simbad.u-strasbg.fr/simbad/sim-id?Ident=*+alf+CMa+B alf CMa B -- White Dwarf = Gaia DR2 2947050466531873024 http://simbad.u-strasbg.fr/simbad/sim-id?Ident=*+alf+CMa+A alf CMa A -- Spectroscopic binary (non Gaia DR2) :)
  14. Exoplanètes : dernières découvertes

    https://exofop.ipac.caltech.edu/tess/view_ctoi.php Community TESS Objects of Interest = CTOI PC = planète candidate 16 étoiles ✨
  15. https://arxiv.org/abs/1902.10103 The Planet Nine Hypothesis (anglais) L'hypothèse de la planète neuf (française)
  16. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=IC+1101&submit=SIMBAD+search IC 1101 -- Brightest galaxy in a Cluster (BCG)
  17. Hayabusa 2 à l'assaut de Ryugu

    en direct 22h45 à 1h15 CET