Friday 27th of January 2017 ~ 08:54:06 UTC (50000) Quaoar occult 4UC 372-110261(mag 15.2)


  • 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

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event.2017-01-27.50000_Quaoar.prediction.2016-07-27

Event
  • Max duration : 43.8 seconds
  • Mag drop : 3.7
  • Shadow velocity : 28.7 km/s
  • Ingress Earth : 2017-01-27 8h50
  • Egress Earth  : 2017-01-27 8h58
  • Moon illumination : 0%
  • Moon phase : New Moon
Asteroidal system
  • Name : (50000) Quaoar
  • Mag : 18.9
  • Asteroid Diameter : 1260 km
  • Geocentric distance : 43.704 AU
  • Number of satellite : 1
  • Satellite : Weywot
  • Diameter : 90 km
  • Max duration : 3.1 sec
Occulted Star
  • Name : 4UC 372-110261
  • Used RA   :   17:59:04.5750 J2000
  • Used DEC : -15:42:23.815 J2000
  • Mv : 15.2
  • VizieR - Aladin
Historic
  • 2016-07-27 : Create prediction
Prediction for (50000) Quaoar and Weywot (wide views)

Quaoar

Quaoar

Quaoar

Quaoar

Weywot

Weywot

Weywot

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 2129268 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 5969 km
    • 2-σ error = 7943 km
    • 3-σ error = 9081 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)