Name: Cor Caroli
    Other names: SAO 63257
    Description: Double Star
    Ascension: 12h 56min 1,7sec
    Declanation: +38° 19' 6''
    Apparent diameter: separation 19.4 arcsec
    Constellation: Canes Venatici
    Magnitude: 2.9 and 5.5
    Distance: 97 light years
    Equipment: ETX90+toucam+Barlow3
    Date / Time UTC: 15 april 2004 00:15
    Stacked : 120 of 367
    Exposure time: AVI
    Location: The Hague, The Netherlands
    Other info: Binary star in the constellation Canes Venatici
    consisting of a brighter component (A) of
    visual magnitude 2.9 and a companion (B) of
    magnitude 5.5. It is the prototype for a group of
    unusual spectrum-variable stars that show strong
    and fluctuating absorption lines of silicon,
    chromium,strontium, or certain rare earths.
    [A] Cor Caroli (Alpha-2) is a "magnetic star," and
    possesses one of the strongest known
    magnetic fields.
    No change in the relative position of the stars has
    been observed since 1830. This indicates that the
    orbital period of the pair must be very long.

     

    © Job Gehéniau

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

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