2014-06-13 21h10 to 21h30
(45) Eugenia - Petit Prince - Petite Princesse
Occulted star mag 11.5

Prediction for (45) Eugenia and its both satellite (NEW UPDATE : 11-06-2014)

• Donwload the Google Earth File KMZ
• green line is the central line of Eugenia
• blue lines show the estimate size of Eugenia
• red lines the 1-sigma error for the path
• white lines show Petit-Prince on South and Petite-Princesse on North.

Contents

• Orbital solution for satellites fitted by Genoid project (Vachier F., Berthier J.) IMCCE/CNRS
• Ephemeris available with Miriade Project (Berthier J. & Vachier F.) IMCCE/CNRS
• Astrometry reduction by Raoul Berhend Observatoire de Genève.
• Prediction by Vachier F. using Occult 4.1.0.29 (Occultation Prediction Software by D.Herald)
• Ephemeris and offset based on ASTORB (Edward Bowell)
• Astrometrical observations with A. Klotz, on Telescope 60cm, Les Makes, La Reunion (2014-05-02) obtaining the update 18-05-2014. We found a problem with datation on this set of images. We have to remove this prediction.
• Astrometrical observations by JP.Teng and Andre Peyrot, on Telescope 60cm, Les Makes, La Reunion (2014-05-25). Good datation.
• 2014-05-30: Astrometrical observations by N.Esseiva, on Telescope 28cm, Saint-Martin Observatory. Only Eugenia. at this time we use Star position from UPDATE.2014-05-25
• 2014-05-31: Astrometrical observations by N.Esseiva, on Telescope 28cm, Saint-Martin Observatory.
• 2014-06-01: Astrometrical observations by F. Manzini, Stazione Astronomica di Sozzago, I-28060 Sozzago, Italy
• 2014-06-02: New orbit determination for Petit-Prince by F.Vachier.
• 2014-06-04: New astrometric measurments on Optic Adaptative images for Petit-Prince and Petite-Princesse by P.Descamps.
• 2014-06-04: New astrometric measurments for Eugenia System by R.Berhend on Astrometrical observations by N.Esseiva.
• 2014-06-04: New occultation prediction based on R.Berhend reduction give the UPDATE.2014-05-30.
• 2014-06-5: Astrometrical observations by N.Esseiva, on Telescope 28cm, Saint-Martin Observatory.
• 2014-06-06: Astrometrical observations by JP.Teng and Andre Peyrot, on Telescope 60cm, Les Makes, La Reunion. and by N.Esseiva, on Telescope 28cm, Saint-Martin Observatory and by J.L. Ortiz on 0.45m ASH telescope in Argentina.
• 2014-06-07: Astrometrical observations by JP.Teng and Andre Peyrot, on Telescope 60cm, Les Makes, La Reunion and by N.Esseiva, on Telescope 28cm, Saint-Martin Observatory.
• 2014-06-07: New orbital solution for Petit-Prince with Genoide F.Vachier. The result show a good confident fitting w.r.t the primary. Obviously is not the case for Petite-Princesse and I obtain a very bad orbit.
• 2014-06-10: Astrometrical reduction and Prediction compute by F.Vachier on last observations from Les Makes. with reference catalogues UCAC2 et UCAC4.
• 2014-06-11: Final prediction compute by Raoul Berhend on all observations by 4 telescopes. Star positions J2000 : 15h35m15.3808s, -8°31'28.437". all raw data after astrometry here.

Suggestions to observe

For those interested to observe the occultation by a satellite, the apparent motion of shadow is 7 km/sec. So you should choose the best exposure time compared to the signal on noise of the apparent star. For example, to observe a 7-km satellite with a Watec 120N+, one should select the setting mode 3 (sum of 4 images). The cumulative exposure time is then 0.160 sec. The disappearance of the star will be span on 6 images in the final light-curve. Try to outstrip these specifications.

French observer's : "La prédiction donne une bande entre Tarbes et Nice. Mais les erreurs de positions cumulées sur l'étoile, Eugenia et Petite-Princesse, peuvent engendrer un décalage de 100 km au nord (ligne Montauban-Gap) ou au sud. Si vous habitez en dessous de la ligne Montauban-Gap, vous pouvez rester dans votre jardin pour faire l'observation. L'occultation aura lieu en début de nuit et vous pouvez vous entrainer des ce soir. Pour ceux qui tentent le déplacement, vous trouverez sur cette page la derniere prediction, en fonction des mises a jour, si elles ont lieues."

Ephemeris

Ephemeris for Eugenia
Ephemeris for Petit Prince : x_sat and y_sat columns for differential position from primary in arc second.
Ephemeris for Petite Princesse : x_sat and y_sat columns for differential position from primary in arc second.

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

Occulted Star

• Position J2000 (updated by astrometrical observation Telescope T60 Les Makes, La Reunion) :

  Mean RA    (deg): 233.8141097   (  15 35 15.3863 )
  Mean DEC   (deg):  -8.5245618   ( -08 31 28.422  )
  Stdev RA   (mas): 26.4
  Stdev DEC  (mas): 30.9
  
  Mag R ~ 11.5 (New determination)
  

• 3UC 163-139142

  Information du catalogue: UCAC3 
  Magnitude visuelle: 12.24
  Indice de couleur: 0.77
  Mouvement propre en ascension droite: -4 [mas/y]
  Mouvement propre en declinaison: -11 [mas/y]
  Coordonnees: Moyenne J2000 Epoque: 2000.0
  Moyenne J2000 AR: 15h35m15.391s DE:-08d31'28.24"
  

Prediction for (45) Eugenia (NEW UPDATE : 11-06-2014)

On Google Earth : Eugenia with both satellites or Eugenia or Petit-Prince or Petite-Princesse

Field of View

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