Thursday 2nd of March 2017 ~ 04:02:36 UTC (41) Daphne occult TYC 4922-00368-1(mag 9.3)


  • Download the Google Earth File KMZ
  • green line is the central line of (41) Daphne
  • blue lines show the estimate size of (41) Daphne
  • red lines the 1-sigma error for the path
  • white lines show S/2008 (41) 1
Event
  • Max duration : 20.3 seconds
  • Mag drop : 1.0
  • Shadow velocity : 10.3 km/s
  • Ingress Earth : 2017-03-02 3h56
  • Egress Earth  : 2017-03-02 4h10
  • Moon illumination : 15%
  • Moon phase : Evening crescent
Asteroidal system
  • Name : (41) Daphne
  • Mag : 9.8
  • Asteroid Diameter : 210 km
  • Geocentric distance : 1.248 AU
  • Number of satellite : 1
  • Satellite : S/2008 (41) 1
  • Diameter : 2 km
  • Max duration : 0.2 sec
Occulted Star
  • Name : TYC 4922-00368-1
  • Used RA   :   11:10:29.6889 J2000
  • Used DEC : -01:24:14.778 J2000
  • Mv : 9.3
  • VizieR - Aladin
Historic
  • 2016-07-11 : Create prediction
Prediction for (41) Daphne and S/2008 (41) 1 (wide views)

Daphne

Daphne

Daphne

Daphne

S/2008 (41) 1

S/2008 (41) 1
Ephemerides from IMCCE

Ephemeris for (41) Daphne

Ephemeris for S/2008 (41) 1

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

Orbitography for the (41) Daphne system

S/2008 (41) 1

S/2008 (41) 1

Astrometric observations centered on (41) Daphne.
Dot represents one observed position. The vector shows ephemeris position from observed position.

S/2008 (41) 1

S/2008 (41) 1

Geometry of orbit for the (41) Daphne system view from Earth
  • Cyan circle show the position of the satellite S/2008 (41) 1 at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (41) Daphne 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

    S2008-41-1

    S2008-41-1
    This figure represent 2098731 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 950 km
    • 2-σ error = 954 km
    • 3-σ error = 962 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)