symaski62

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Tout ce qui a été posté par symaski62

  1. comète C/2017 K2 +18 mag

    http://www.aerith.net/comet/catalog/2017K2/2017K2.html https://fr.wikipedia.org/wiki/C/2017_K2_(PANSTARRS) Diamètre du noyau : 18 km Object Data Page ( https://ssd.jpl.nasa.gov/horizons.cgi ) JPL/HORIZONS PANSTARRS (C/2017 K2) 2018-Feb-22 19:36:14 Rec #:904293 (+COV) Soln.date: 2018-Jan-31_15:19:26 # obs: 446 (2013-2018) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2457939.5 ! 2017-Jul-05.0000000 (TDB) RMSW= n.a. EC= 1.000292122779648 QR= 1.810720348311386 TP= 2459934.9659656566 OM= 88.18223673127592 W= 236.0251917492567 IN= 87.55364469349342 A= -6198.490752735831 MA= -.0040301337764455 ADIST= 9.999999E99 PER= 9.999999E99 N= 2.02E-6 ANGMOM= .032738128 DAN= 8.21292 DDN= 2.32328 L= 271.8066069 B= -55.9477846 MOID= 1.10323 TP= 2022-Dec-21.4659656566 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 6.3 M2= n.a. k1= 6. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#16, data arc: 2013-05-12 to 2018-01-23 2: k1=6.; m1 = 1.0 + 5 log d + 10.0 log r (bleu) => total m1 = 6.3 + 5 log d + 6 log r (rouge) => noyau
  2. comète C/2017 K2 +18 mag

    https://theskylive.com/c2017k2-tracker
  3. 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
  4. mars 2020 rover

    Nasa: le prochain robot martien pourrait produire de l'oxygène sur site http://www.bfmtv.com/planete/nasa-prochain-robot-martien-pourrait-produire-loxygene-site-822859.html
  5. 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
  6. 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
  7. 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
  8. Falcon Heavy : l'Odysée de la Tesla dans l'espace

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

    https://theskylive.com/roadster-info https://theskylive.com/roadster-tracker en direct
  10. 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
  11. 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)
  12. Falcon Heavy : l'Odysée de la Tesla dans l'espace

    https://www.youtube.com/watch?v=wbSwFU6tY1c mise à jour 20h50 cet
  13. Falcon Heavy : l'Odysée de la Tesla dans l'espace

    https://spaceflightnow.com/2018/01/29/live-from-launch-pad-39a-members-only/ en direct vidéo
  14. Falcon Heavy : l'Odysée de la Tesla dans l'espace

    https://www.youtube.com/watch?v=wbSwFU6tY1c 22h30 cet demain
  15. lune éclipse youtube NASA TV

    bientôt lune rouge
  16. lune éclipse youtube NASA TV

    75 % plus éclipse lune
  17. Exoplanètes : dernières découvertes

    https://arxiv.org/abs/1801.06957 EPIC 210897587: A Bright Metal-Poor M Dwarf with Three Transiting Super-Earths 3 planètes !
  18. Mauvaises nouvelles du Webb space telescope

    1:18 pause, ( paramètres => vitesse 0.25 ) début: 1) 18.85 °C => 292°K 2) -253.15°C => 20°K 3) -168.15°C => 105°K 4) -198.15°C => 75°K 5) -153.15°C => 120°K 6) -133.15°C => 140°K 7) 18.85°C => 292°K FIN
  19. Exoplanètes : dernières découvertes

    https://arxiv.org/abs/1801.02554 TRAPPIST-1 à Spitzer Space Telescope février à mars 2017