Comet 78P/Gehrels

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    Comet 78P/Gehrels

    Time Stamp: 2011 08 09, 9:08:48 UT
    Motion: 0.11"/min in PA 53.2°
    approximately 5 months before perihelion
    Magnitude 15.6 N
    Tail 3'30" or ~3.5 arc minutes or 210 arc sec PA 245 deg
    perihelion date T 2012 Jan. 12.9086 TT
    perihelion distance q = 2.008568 AU
    earth distance delta = 1.559 AU receding
    solar distance r =2.366 AU
    elongation = 132.5 degrees
    phase = 18.4 degrees

    stack of 6 x 600 sec Total exposure 3600 sec or 60 minutes or 1 hour
    0.3-m f/6.4 Schmidt-Cassegrain + CCD + Red filter
    C. Bell H47 Vicksburg

    Classification: Jupiter-family Comet T_jup = 2.887

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