Saturday 28th of October 2017 ~ 20:37:06 UTC (45) Eugenia occult 4UC 485-051965(mag 12.4)


  • Download the Google Earth File KMZ
  • green line is the central line of (45) Eugenia
  • blue lines show the estimate size of (45) Eugenia
  • red lines the 1-sigma error for the path
  • white lines show Petit-Prince
Event
  • Max duration : 5.2 seconds
  • Mag drop : 1.2
  • Shadow velocity : 35.2 km/s
  • Ingress Earth : 2017-10-28 20h34
  • Egress Earth  : 2017-10-28 20h40
  • Moon illumination : 59%
  • Moon phase : First quarter
Asteroidal system
  • Name : (45) Eugenia
  • Mag : 13.1
  • Asteroid Diameter : 184 km
  • Geocentric distance : 3.179 AU
  • Number of satellite : 2
  • Satellite : Petit-Prince
  • Diameter : 7 km
  • Max duration : 0.2 sec
  • Satellite : Petite-Princesse
  • Diameter : 5 km
  • Max duration : 0.1 sec
Occulted Star
  • Name : 4UC 485-051965
  • Used RA   :   10:53:06.4467 J2000
  • Used DEC : +06:48:36.922 J2000
  • Mv : 12.4
  • VizieR - Aladin
Historic
  • 2016-07-11 : Create prediction
Prediction for (45) Eugenia and Petit-Prince (wide views)

Eugenia

Eugenia

Petit-Prince

Petit-Prince

Petite-Princesse

Petite-Princesse

Ephemerides from IMCCE

Ephemeris for (45) Eugenia

Ephemeris for Petit-Prince

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

Orbitography for the (45) Eugenia system

Petit-Prince

Petit-Prince

Astrometric observations centered on (45) Eugenia.
Dot represents one observed position. The vector shows ephemeris position from observed position.

Petit-Prince

Petit-Prince

Geometry of orbit for the (45) Eugenia system view from Earth
  • Cyan circle show the position of the satellite Petit-Prince at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (45) Eugenia represented by an ellipsoid
  • Petite-Princesse

    Petite-Princesse

    Astrometric observations centered on (45) Eugenia.
    Dot represents one observed position. The vector shows ephemeris position from observed position.

    Petite-Princesse

    Petite-Princesse

    Geometry of orbit for the (45) Eugenia system view from Earth
  • Cyan circle show the position of the satellite Petite-Princesse at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (45) Eugenia 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

    Petit-Prince

    Petit-Prince
    This figure represent 2073182 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 185 km
    • 2-σ error = 199 km
    • 3-σ error = 220 km

    Petite-Princesse

    Petite-Princesse
    This figure represent 2059291 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 257 km
    • 2-σ error = 276 km
    • 3-σ error = 315 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)