Tuesday 14th of June 2016 ~ 22:36:47 UTC (50000) Quaoar occult 4UC 374-103314(mag 13.9)


  • Download the Google Earth File KMZ
  • green line is the central line of (50000) Quaoar
  • blue lines show the estimate size of (50000) Quaoar
  • red lines the 1-sigma error for the path
  • white lines show Weywot
Event
  • Max duration : 51.1 seconds
  • Mag drop : 4.8
  • Shadow velocity : 24.7 km/s
  • Ingress Earth : 2016-06-14 22h32
  • Egress Earth  : 2016-06-14 22h42
  • Moon illumination : 74%
  • Moon phase : First quarter
Asteroidal system
  • Name : (50000) Quaoar
  • Mag : 18.7
  • Asteroid Diameter : 1260 km
  • Geocentric distance : 41.951 AU
  • Number of satellite : 1
  • Satellite : Weywot
  • Diameter : 90 km
  • Max duration : 3.6 sec
Occulted Star
  • Name : 4UC 374-103314
  • Used RA   :   17:52:51.6128 J2000
  • Used DEC : -15:23:14.563 J2000
  • Mv : 13.9
  • VizieR - Aladin
Historic
  • 2015-07-01 : Create prediction
Prediction for (50000) Quaoar and Weywot (wide views)

Quaoar

Weywot

Ephemerides from IMCCE

Ephemeris for (50000) Quaoar

Ephemeris for Weywot

Ephemeris from Miriade for the date of occultation and geocenter frame. For more specific ephemeris please use the documentation of Miriade.

Orbitography for the (50000) Quaoar system

Weywot

Weywot

Astrometric observations centered on (50000) Quaoar.
Dot represents one observed position. The vector shows ephemeris position from observed position.

Weywot

Weywot

Geometry of orbit for the (50000) Quaoar system view from Earth
  • Cyan circle show the position of the satellite Weywot at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (50000) Quaoar represented by an ellipsoid
  • Propagation of the solutions
    We use all orbits from 1,2 and 3 sigma issued from Genetical algorithm, and we see where the satellite is for the occultation date. North on top, and East on right.
    • Center at coordinates 0,0 is Primary
    • Black dots show the orbit with the best solution at the date of occultation
    • Green zone show orbits covering 1-sigma error
    • Blue zone for 2-sigma
    • Red zone for 3-sigma

    Weywot

    Weywot
    This figure represent 2130399 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 4495.26 km
    • 2-σ error = 5830.38 km
    • 3-σ error = 7867.17 km
    Contents
    • Orbital solution fitted by Genoid project (Vachier F., Berthier J., Carry B. & Pajuelo M.) IMCCE/CNRS
    • Ephemeris has made available with Miriade Project (Berthier J. & Vachier F.) IMCCE/CNRS
    • Occultation Prediction by Vachier F. using Occult (Occultation Prediction Software by D.Herald)
    • Ephemeris and offset based on ASTORB (Edward Bowell)