Sunday 20th of November 2016 ~ 18:40:12 UTC (283) Emma occult 4U 455-51223(mag 8.7)


  • Download the Google Earth File KMZ
  • green line is the central line of (283) Emma
  • blue lines show the estimate size of (283) Emma
  • red lines the 1-sigma error for the path
  • white lines show S/2003 (283) 1

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event.2016-11-20.283_Emma.prediction.2016-11-06

Event
  • Max duration : 5.5 seconds
  • Mag drop : 6.2
  • Shadow velocity : 24.5 km/s
  • Ingress Earth : 2016-11-20 18h36
  • Egress Earth  : 2016-11-20 18h44
  • Moon illumination : 56%
  • Moon phase : Last quarter
Asteroidal system
  • Name : (283) Emma
  • Mag : 14.9
  • Asteroid Diameter : 135 km
  • Geocentric distance : 3.664 AU
  • Number of satellite : 1
  • Satellite : S/2003 (283) 1
  • Diameter : 10 km
  • Max duration : 0.4 sec
Occulted Star
  • Name : 4U 455-51223
  • Used RA   :   11:14:27.5611 J2000
  • Used DEC : +00:53:32.671 J2000
  • Mv : 8.7
  • VizieR - Aladin
Historic
  • 2015-07-01 : Create prediction
  • 2016-11-06 : Update with Gaia14
Prediction for (283) Emma and S/2003 (283) 1 (wide views)

Emma

Emma

Emma

Emma

S/2003 (283) 1

S/2003 (283) 1

S/2003 (283) 1

S/2003 (283) 1
Ephemerides from IMCCE

Ephemeris for (283) Emma

Ephemeris for S/2003 (283) 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 (283) Emma system

S/2003 (283) 1

S/2003 (283) 1

Astrometric observations centered on (283) Emma.
Dot represents one observed position. The vector shows ephemeris position from observed position.

S/2003 (283) 1

S/2003 (283) 1

Geometry of orbit for the (283) Emma system view from Earth
  • Cyan circle show the position of the satellite S/2003 (283) 1 at the occultation date.
  • The black dots show next positions during almost a period
  • In the center, (283) Emma 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

    S2003-283-1

    S2003-283-1
    This figure represent 1965012 orbits computed to the occultation date. Each orbit is classify throw its performance, given an accuracy in kilometer :
    • 1-σ error = 1029 km
    • 2-σ error = 1090 km
    • 3-σ error = 1099 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)