Thursday 5th of October 2017 ~ 11:20:06 UTC (93) Minerva occult TYC 6807-00260-1(mag 12.0)


  • Download the Google Earth File KMZ
  • green line is the central line of (93) Minerva
  • blue lines show the estimate size of (93) Minerva
  • red lines the 1-sigma error for the path
  • white lines show Aegis
Event
  • Max duration : 4.8 seconds
  • Mag drop : 1.4
  • Shadow velocity : 35.2 km/s
  • Ingress Earth : 2017-10-05 11h17
  • Egress Earth  : 2017-10-05 11h23
  • Moon illumination : 100%
  • Moon phase : Full Moon
Asteroidal system
  • Name : (93) Minerva
  • Mag : 13.1
  • Asteroid Diameter : 170 km
  • Geocentric distance : 2.736 AU
  • Number of satellite : 2
  • Satellite : Aegis
  • Diameter : 8 km
  • Max duration : 0.2 sec
  • Satellite : Gorgoneion
  • Diameter : 6 km
  • Max duration : 0.2 sec
Occulted Star
  • Name : TYC 6807-00260-1
  • Used RA   :   16:30:35.3078 J2000
  • Used DEC : -29:20:54.777 J2000
  • Mv : 12.0
  • VizieR - Aladin
Historic
  • 2016-07-12 : Create prediction
Prediction for (93) Minerva and Aegis (wide views)

Minerva

Minerva

Aegis

Aegis

Gorgoneion

Gorgoneion

Ephemerides from IMCCE

Ephemeris for (93) Minerva

Ephemeris for Aegis

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

Orbitography for the (93) Minerva system

Aegis

Aegis

Astrometric observations centered on (93) Minerva.
Dot represents one observed position. The vector shows ephemeris position from observed position.

Aegis

Aegis

Geometry of orbit for the (93) Minerva system view from Earth
  • Cyan circle show the position of the satellite Aegis at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (93) Minerva represented by an ellipsoid
  • Gorgoneion

    Gorgoneion

    Astrometric observations centered on (93) Minerva.
    Dot represents one observed position. The vector shows ephemeris position from observed position.

    Gorgoneion

    Gorgoneion

    Geometry of orbit for the (93) Minerva system view from Earth
  • Cyan circle show the position of the satellite Gorgoneion at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (93) Minerva 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

    Aegis

    Aegis
    This figure represent 1980440 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 1265 km
    • 2-σ error = 1286 km
    • 3-σ error = 1290 km

    Gorgoneion

    Gorgoneion
    This figure represent 1977598 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 597 km
    • 2-σ error = 617 km
    • 3-σ error = 645 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)