Tuesday 14th of March 2017 ~ 21:21:41 UTC (22) Kalliope occult TYC 2427-775-1(mag 12.2)


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  • 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

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event.2017-03-14.22_Kalliope.prediction.2017-02-28

Event
Moon
  • Moon illumination : 95%
  • Moon phase : Full Moon
(22) Kalliope
  • Mag : 11.5
  • Asteroid Diameter : 167 km
  • Geocentric distance : 2.407 AU
  • Number of satellite : 1
  • Max duration : 12.7 seconds
  • Mag drop : 0.46
  • Shadow velocity : 13.1 km/s
  • Ingress Earth : 2017-03-14 21h15
  • Egress Earth  : 2017-03-14 21h28
Occulted Star : TYC 2427-775-1
  • Used RA   :   06:08:03.0863 J2000
  • Used DEC : +34:54:57.765 J2000
  • Mv : 12.2
  • VizieR - Aladin
Linus
  • Satellite : Linus
  • Diameter : 28 km
  • Max duration : 2.1 sec
Timing compared the primary event date
  • Solution's offset : + 4 s
  • Minimum offset : - 3 s
  • Maximum offset : + 11 s
  • Total uncertainty on datation : 14 s
Position compared the primary event path
  • Theses values are positive to the North
  • Solution's offset = 951 km
  • Min-Max offset 1-σ = 875 ↔ 1023 km
  • Min-Max offset 2-σ = 869 ↔ 1030 km
  • Min-Max offset 3-σ = 861 ↔ 1034 km
  • Size of uncertainty 1-σ error = 148 km
  • Size of uncertainty 2-σ error = 161 km
  • Size of uncertainty 3-σ error = 173 km
Historic
  • 2017-02-28 : 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 shows 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 shows orbits covering 1-sigma error
    • Blue zone for 2-sigma
    • Red zone for 3-sigma

    Linus

    Linus
    This figure represent 2008628 orbits computed to the occultation date. Each orbit is classify through its performance, given an accuracy in kilometer :
    • 1-σ error = 148 km
    • 2-σ error = 161 km
    • 3-σ error = 173 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)