Sunday, the 10 of February, 2019 ~ 16:05:11 UTC (216) Kleopatra occult UCAC4 468-022871 (mag 9.46)


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  • Legend
    • green line is the central line of (216) Kleopatra
    • blue lines show the estimate size of (216) Kleopatra
    • red lines the 1-sigma error for the path
    • white lines show satellite
Event
  • Date : Sunday, the 10 of February, 2019 ~ 16:05:11 UTC
  • Max duration : 20.4 seconds
  • Shadow velocity : 6.3 km/s
  • Barycenter prediction : Preston2019Jan13
Asteroidal system
  • Name : (216) Kleopatra
  • Mag : 11.18
  • Geocentric distance : 1.7129 AU
  • Number of Components : 2
  • Component : Kleopatra
  • Diameter : 128.0 km
  • Max duration : 20.4 sec
  • Component : Alexhelios
  • Diameter : 9.0 km
  • Max duration : 1.4 sec
Occulted Star
  • Name : UCAC4 468-022871
  • Used RA   :   06h49m51s0 J2000
  • Used DEC : +03d27m03s5 J2000
  • Mb : 9.74
  • Mv : 9.46
  • Mr : 9.30
  • VizieR - Aladin
Historic
  • 2019-02-08 : Create prediction
Prediction for (216) Kleopatra system. (wide views)

Kleopatra

Kleopatra

Kleopatra

Kleopatra

Alexhelios

Alexhelios

Alexhelios

Alexhelios
Ephemerides from IMCCE

Ephemeris for Kleopatra

Ephemeris for Alexhelios

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

Orbitography for the (216) Kleopatra system

Alexhelios

Alexhelios

Astrometric observations of Alexhelios centered on (216) Kleopatra.
Dot represents one observed position. The vector shows ephemeris position from observed position.

All components on the tangent plane

Alexhelios
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

Alexhelios

Alexhelios
This figure represent 191198 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
  • 1-σ error = 84 km
  • 2-σ error = 97 km
  • 3-σ error = 113 km
Contents
  • Orbital solution fitted by Genoid project (Vachier F., Berthier J., Carry B.) 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)