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Thread: Koposov-I- Milky Way Globular

  1. #1
    Member lamperti's Avatar
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    Apr 2012
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    Koposov-I- Milky Way Globular

    Small globular in Virgo discovered in 2007 and definitely off the beaten path!

    Wikipedia: "Koposov I and Koposov II were described by their discoverers as the "lowest luminosity globular clusters orbiting the Milky Way," along with AM 4, Palomar 1, and Whiting 1.

    At 450x and a 22", Koposov-I showed as a hazy, faint glow around a faint star. No resolution.

    RA=11h 59m 18.05s[1]
    Declination =+12° 15′ 36.0″
    Distance= 157.5 kly (48.3 kpc)
    Apparent magnitude (V)=14.20

    Koposov II is in Gemini and much fainter. Better challenge for imagers.

    Al
    15" f4.5 Obsession Classic
    4" f8.6 Televue 102

  2. #2
    Member FaintFuzzies's Avatar
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    Feb 2012
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    Hill Country Texas
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    Hi Al,

    Jimi and I observed both objects in 2012.

    http://www.faintfuzzies.com/OR-April162012-FD-Misc.html

    Koposov 2 globular cluster in Gemini
    48” at 488x - Very faint small round even surface brightness glow. Popped in and out, 75% of the time. About 0.3’ across.


    Koposov 1 globular cluster in Virgo
    48” at 488x - Some speckling was detected around a considerably bright very small fuzzy star in the center.
    Clear skies,
    Alvin #26
    faintfuzzies.com

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