Comments

This should be an easy target, and maybe scientifically valuable because of the long period.

Basic data

    RA = 21:38:08.7, DE = +30:29:19
    Season = Aug 18
    V = 10.54, J = 9.017 (22), K = 8.544 (25) -> B = 11.25(16), V = 10.46(11), Rc=10.03(8), Ic=9.62(6), B-V=0.78(19)
    HJDo = 4801.16945 (20) and P = 10.338523 (9) days (as listed in Schneider's Extrasolar Planets Encyclopaedia, HJDo corrected from earlier value)
    Depth =  19.1 ± 1.5 mmag
    Length = 4.06 ± 0.02 hr
    Fp = 0.?? ± 0.??, F2 = 0.?? ± 0.??
    b = 0.31 ± 0.07

Table & Plots of Amateur Observations - 

Amateur Light Curves

Professional Light Curves

              

Finder Charts

           
Finder image based on Palomar Observatory Sky Survey (POSS) B & R photographic plate images (converted to RGB color by SkyMap (http://sky-map.org/).

           
Finder image, created by Joao Gregorio (based on DSS2-POSS II image retrieved by Aladin), showing colors of candidate reference stars.

References

Discovery paper: Howard, A. W. et al, 2010  http://fr.arxiv.org/abs/1008.3898v1

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WebMaster: Bruce L. Gary.  Nothing on this web page is copyrighted. This site opened:  2010.08.30.  Last Update:  2010.08.30