Sunday 1st of May 2016 ~ 00:43:47 UTC (702) Alauda occult HIP 40499(mag 8.9)


  • Download the Google Earth File KMZ
  • green line is the central line of (702) Alauda
  • blue lines show the estimate size of (702) Alauda
  • red lines the 1-sigma error for the path
  • white lines show Pichi_Unem
Event
  • Max duration : 12.6 seconds
  • Mag drop : 4.3
  • Shadow velocity : 17.4 km/s
  • Ingress Earth : 2016-05-01 0h38
  • Egress Earth  : 2016-05-01 0h49
  • Moon illumination : 41%
  • Moon phase : Morning crescent
Asteroidal system
  • Name : (702) Alauda
  • Mag : 13.2
  • Asteroid Diameter : 219 km
  • Geocentric distance : 3.187 AU
  • Number of satellite : 1
  • Satellite : Pichi_Unem
  • Diameter : 4 km
  • Max duration : 0.2 sec
Occulted Star
  • Name : HIP 40499
  • Used RA   :   08:16:07.3372 J2000
  • Used DEC : +07:42:31.745 J2000
  • Mv : 8.9
  • VizieR - Aladin
Historic
  • 2015-07-01 : Create prediction
  • 2016-04-13 : Update orbit, and add information about accuracy and propagation
Prediction for (702) Alauda and Pichi_Unem (wide views)

Alauda

Alauda

Pichi_Unem

Pichi_Unem

Ephemerides from IMCCE

Ephemeris for (702) Alauda

Ephemeris for Pichi_Unem

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

Orbitography for the (702) Alauda system

Pichi_Unem

Pichi_Unem

Astrometric observations centered on (702) Alauda.
Dot represents one observed position. The vector shows ephemeris position from observed position.

Pichi_Unem

Pichi_Unem

Geometry of orbit for the (702) Alauda system view from Earth
  • Cyan circle show the position of the satellite Pichi_Unem at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (702) Alauda 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

    Pichi_Unem

    Pichi_Unem
    This figure represent 1883841 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 682.04 km
    • 2-σ error = 776.99 km
    • 3-σ error = 939.66 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)