Comments

This is a difficult target for getting a good depth because of a companion star 7"arc away and only 1.36 mag fainter in R-band (according to the discovery paper, Bakos et al, 2010).

Basic data

    RA = 07:27:40.0, DE = +24:20:12
    Season = Jan 11
    V = 11.34, J = 9.276 (22), K = 8.601 (19) -> B = 12.27(15), V = 11.19(10), Rc=10.61(8),Ic=10.08(6), B-V=1.08(18)
    HJDo = 5080.92661 (21) and P = 2.875317 (4) days (as listed in Schneider's Extrasolar Planets Encyclopaedia, HJDo corrected from earlier value)
    Depth = 19 ± 1 mmag
    Length = 1.85 ± 0.02 hr
    Fp = 0.?? ± 0.??, F2 = 0.?? ± 0.??
    b = 0.63 ± 0.03

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/). Note that HAT-P-20 is the brighter of two stars ~7" arc apart.

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

References

Discovery paper: Bakos et al, 2010  http://fr.arxiv.org/abs/1008.3388v1

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WebMaster: Bruce L. Gary.  Nothing on this web page is copyrighted. This site opened:  2010.08.19.  Last Update:  2010.08.24