PHEMU – 2014 Dec 24 – Europa (II) eclipsed Ganymede (III)

Forums Jupiter PHEMU – 2014 Dec 24 – Europa (II) eclipsed Ganymede (III)

Viewing 4 posts - 1 through 4 (of 4 total)
  • Author
    Posts
  • #573402
    Alex Pratt
    Participant

    Provisional result of video photometry of this PHEMU event from Christmas Eve morning.

    The minimum brightness of Ganymede occurred about 06:35:18 UTC.

    A formal report will be submitted to the IMCCE in due course.

    Clear skies,

         Alex.

     

    #576724
    Bill Ward
    Participant

    Hi,

    That is pretty slick work Alex.

    An excellent result!

    cheers,

    Bill.

    #576723
    Jeremy Shears
    Participant

    That’s an excellent result, Alex. Well done! Really nice “tight” photometry plots.

    Go well!

    Jeremy

    #576725
    Alex Pratt
    Participant

    Thanks Jeremy, Bill.

    Every 6 years the Galilean satellites of Jupiter undergo a long series of mutual eclipses and occultations (partial, annular and total), thanks to the alignment of their orbital plane as viewed from Earth. These are known as PHEMUs (mutual phenomena).

    Satellites of other gas giants can also encounter PHEMUs, although the Jovian ones are the most well-known.

    The worldwide observing campaign is administered by the Institut de Mecanique Celeste et de Calcul des Ephemerides (IMCCE, Paris). By combining data from numerous observations the ephemerides of the Galilean satellites can be refined.

    I won’t post all my results on the Forum – this was just a nice example.

    Clear skies,

         Alex.

Viewing 4 posts - 1 through 4 (of 4 total)
  • You must be logged in to reply to this topic.