Name: Iota Cassiopeiae
    Other names: SAO 12298
    Description:  
    Ascension:  
    Declanation:  
    Apparent diameter:  
    Constellation: Cassiopeia
    Magnitude:  
    Distance:  
    Equipment: ETX90 icx424 f/27.6 and f/69 (5* telextneder)
    Date / Time UTC: 16 october 2005
    Stacked :  
    Exposure time:  
    Location: The Hague, The Netherlands
    Other info: Triple Star Iota Cassiopeiae Iota Cas, which is largely ignored as a result of
    the luster of the rest of the constellation. And too bad, as the star -- 140 light
    years away -- is one of the more wonderful multiples of the nighttime sky.
    A small telescope reveals an attractive triple. The bright member is a fifth
    magnitude (4.65) class A (A5 peculiar) dwarf called Iota-A. Lying just 2.7 seconds
    of arc away is 7th magnitude (6.9) class F (F5) Iota-B, while 7.4 seconds of arc out
    is ninth magnitude (8.7) class K (K1) Iota-C (both dwarfs).
    While A and B are both white and fairly colorless, C is on the orange side.
    The closeness of the stars leads to false visual color contrasts that make the
    system quite pretty and well worth a look

     

    © Job Gehéniau

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

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