Friday 28th of April 2017 ~ 12:53:17 UTC (22) Kalliope occult TYC 2442-01418-1(mag 11.5)


  • Download the Google Earth File KMZ
  • green line is the central line of (22) Kalliope
  • blue lines show the estimate size of (22) Kalliope
  • red lines the 1-sigma error for the path
  • white lines show Linus
Event
  • Max duration : 7.1 seconds
  • Mag drop : 1.0
  • Shadow velocity : 29.4 km/s
  • Ingress Earth : 2017-04-28 12h50
  • Egress Earth  : 2017-04-28 12h57
  • Moon illumination : 6%
  • Moon phase : Evening crescent
Asteroidal system
  • Name : (22) Kalliope
  • Mag : 12.0
  • Asteroid Diameter : 209 km
  • Geocentric distance : 3.012 AU
  • Number of satellite : 1
  • Satellite : Linus
  • Diameter : 28 km
  • Max duration : 1.0 sec
Occulted Star
  • Name : TYC 2442-01418-1
  • Used RA   :   07:03:54.0849 J2000
  • Used DEC : +33:17:54.810 J2000
  • Mv : 11.5
  • VizieR - Aladin
Historic
  • 2016-07-08 : Create prediction
Prediction for (22) Kalliope and Linus (wide views)

Kalliope

Kalliope

Linus

Linus

Ephemerides from IMCCE

Ephemeris for (22) Kalliope

Ephemeris for Linus

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

Orbitography for the (22) Kalliope system

Linus

Linus

Astrometric observations centered on (22) Kalliope.
Dot represents one observed position. The vector shows ephemeris position from observed position.

Linus

Linus

Geometry of orbit for the (22) Kalliope system view from Earth
  • Cyan circle show the position of the satellite Linus at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (22) Kalliope 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

    Linus

    Linus
    This figure represent 1997144 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 82 km
    • 2-σ error = 87 km
    • 3-σ error = 97 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)