symaski62

Membre
  • Compteur de contenus

    470
  • Inscription

  • Dernière visite

  • Pays

    France

Réputation sur la communauté

16 Neutre

À propos de symaski62

  • Rang
    Membre actif

Informations personnelles

  • Centres d'intérêt
    faire de la science
  1. https://lanceurs.destination-orbite.net/videotransmission.php?id=17 https://www.tickcounter.com/countup/60832/insight-discovery-12-et-marco-1-et-2
  2. Gaia, bientôt J-100!

    @biver oui, V* V645 Cen -- Flare Star (HIP 70890) http://simbad.u-strasbg.fr/simbad/sim-id?Ident=%403379714&Name=V* V645 Cen&submit=submit Parallaxes (mas): 769.8 mas (1995 année) Gaia DR2 5853498713160606720 parallax (mas): 768.5004 mas (2018 année) phot_g_mean_mag: 8.9536 mag (green) phot_bp_mean_mag: 11.3829 mag (bleu) phot_rp_mean_mag: 7.5864 mag (red) teff_val: 3295.50 K (kelvin)
  3. Gaia, bientôt J-100!

    bonjour KIC 8462852 Gaia DR1 2081900940499099136 (2016 année) Parallaxes (mas): 2.55 http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-ref=VIZ5ae24db836e8&-out.add=.&-source=I/345/gaia2&-c=301.56432344243 44.45684219166,eq=ICRS,rs=0.005&-out.orig=o Gaia DR2 2081900940499099136 (2018 année) Parallaxes (mas): 2.2185 = 451 +/- 5 parsecs = 1471 +/- 16 light years mag : 11.762624 teff_val (K) : 5899.25 radius_val (sunRad) : 1.65 lum_val (solLum) : 2.963 -------------------------------- Gaia DR2 2635476908753563008 (TRAPPIST-1) http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-ref=VIZ5ae2c7f8067f&-out.add=.&-source=I/345/gaia2&-c=346.62639186971 -5.04346180221,eq=ICRS,rs=0.005&-out.orig=o parallax : 80.4512 mas phot_g_mean_mag: 15.6451 mag phot_bp_mean_mag: 18.9982 mag phot_rp_mean_mag: 14.0967 mag teff_val: 3352.33 K
  4. comète C/2017 K2 +18 mag

    https://theskylive.com/c2017k2-tracker
  5. Exoplanètes : dernières découvertes

    https://arxiv.org/abs/1803.04543 Possible Bright Starspots on TRAPPIST-1 The M8V star TRAPPIST-1 hosts seven roughly Earth-sized planets and is a promising target for exoplanet characterization. Kepler/K2 Campaign 12 observations of TRAPPIST-1 in the optical show an apparent rotational modulation with a 3.3 day period
  6. comète C/2017 K2 +18 mag

    https://arxiv.org/abs/1802.10380 Note on the dynamical evolution of C/2017 K2 PANSTARRS 1.79334 AU => close 2022 année
  7. Falcon Heavy : l'Odysée de la Tesla dans l'espace

    https://ssd.jpl.nasa.gov/horizons.cgi Ephemeris Type [change] : OBSERVER Target Body [change] : SpaceX Roadster (spacecraft) (Tesla) [-143205] Observer Location [change] : Geocentric [500] Time Span [change] : Start=2018-02-26, Stop=2018-03-08, Step=1 h Table Settings [change] : defaults Display/Output [change] : default (formatted HTML) ------------------------------------------------------------------------------- Encounter predictions for s8 (with gravity-only dynamics): Date (TDB) Body CA Dist MinDist MaxDist Vrel TCA3Sg Nsigs P_i/p ----------------- ----- ------- ------- ------- ------ ------ ------ ------ 2018 Feb 08.09700 Moon .000936 .000936 .000936 3.962 0.42 40889. 0.000 2020 Oct 07.27671 Mars .049248 .048632 .049996 8.132 29.03 6.68E5 0.000 2035 Apr 22.31261 Mars .021004 .007334 .035038 8.315 142.40 37596. 0.000 2047 Jan 12.52967 Earth .029674 .019448 .039078 4.422 4391.7 73261. 0.000 2050 Mar 19.02367 Earth .113309 .089472 .135482 7.215 2540.6 2.42E5 0.000 Date = Nominal encounter time (Barycentric Dynamical Time) CA_Dist = Highest probability close approach distance to body, au MinDist = 3-sigma minimum encounter distance, au MaxDist = 3-sigma maximum encounter distance, au Vrel = Relative velocity at nominal encounter time TCA3Sg = 3-sigma uncertainty in close enocunter time, minutes Nsigs = Number of sigmas to encounter body at nominal encounter time P_i/p = Linearized probability of impact voilà
  8. comète C/2017 K2 +18 mag

    corrige avant m1 = 6.4 + 5 log d + 6 log r (rouge) => noyau après m1 = 6.3 + 5 log d + 6 log r (rouge) => noyau
  9. Falcon Heavy : l'Odysée de la Tesla dans l'espace

    trop vent report 24 heures 22/02/2018 15h17 CET
  10. Falcon Heavy : l'Odysée de la Tesla dans l'espace

    https://theskylive.com/roadster-info https://theskylive.com/roadster-tracker en direct
  11. comète C/2017 K2 +18 mag

    http://www.minorplanetcenter.net/db_search/show_object?utf8=✓&object_id=C%2F2017+K2 mise à jour image +18 mag total 2018 01 12.81740 17 51 30.81 +56 00 09.4 18.1 T 349 – Ageo MPC 107776 avent 1/aorigine = 0.00003028+-0.0000094 (MPEC 2017-V13) après recip semimajor axis orig (AU) 0.00004445
  12. Falcon Heavy : l'Odysée de la Tesla dans l'espace

    https://www.projectpluto.com/temp/spacex.htm Created 2018 Feb 8 21:52:59 UT using Find_Orb Orbital elements (heliocentric): 2018-017A Perihelion 2018 Feb 4.203465 +/- 0.001 TT = 4:52:59 (JD 2458153.703465) Epoch 2018 Feb 10.0 TT = JDT 2458159.5 Earth MOID: 0.0002 Ma: 0.0009 M 3.68515 +/- 0.0016 (J2000 ecliptic) Gray n 0.63575070 +/- 0.000176 Peri. 177.28090 +/- 0.00022 a 1.33950646 +/- 0.000247 Node 317.46990 +/- 0.0010 e 0.2638608 +/- 0.000136 Incl. 1.10989 +/- 0.00058 P 1.55/566.25d H 25.7 G 0.15 U 6.9 q 0.98606318 +/- 3.95e-8 Q 1.69294974 +/- 0.000494 53 of 57 observations 2018 Feb. 8 (14.0 hr); mean residual 0".414 ------------------------------------- https://ssd.jpl.nasa.gov/horizons.cgi Ephemeris Type [change] : OBSERVER Target Body [change] : SpaceX Roadster (spacecraft) (Tesla) [-143205] Observer Location [change] : Mars (body center) [500@499] Time Span [change] : Start=2020-09-01, Stop=2020-10-31, Step=1 h Table Settings [change] : defaults Display/Output [change] : default (formatted HTML)