Name: Messier 40
    Other names:  
    Description: Double Star
    Ascension: 12 : 22.4
    Declanation: +58 : 05
    Apparent diameter: 0.8 (arc min)
    Constellation: Ursa Major
    Magnitude: 8.4
    Distance: 510 light years
    Equipment: Meade ETX90+Modified toucam (new eprom)+focal reducer 0.66
    Date / Time UTC: 24 april 2004 22:15
    Stacked : 22 of 79
    Exposure time: 20 s
    Location: The Hague, The Netherlands
    Other info:

    This faint double star was found by Charles Messier when he was searching for a nebula which was - erroneously - reported by the 17th-century observer Johann Hevelius in this vicinity.

     

    © Job Gehéniau

    http://www.jgeheniau.nl/etx90/astronomy2.html

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