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|Right ascension (Epoch J2000)||18h 38m 53.40s|
|Declination (Epoch J2000)||-21° 03' 06.70"|
|Spectral type||G5 V|
|Distance from Sol||42.3 ly|
|Other designations||HR 6998, Gl 722, Hip 91438, HD 172051, BD -21°5081, SAO 187086.|
BD -21°5081 is located about 42.3 light-years from Sol. This southern star lies in the western part of the constellation Sagittarius, the Archer. BD -21°5081 is a yellow-orange main sequence dwarf star of spectral and luminosity type G5 V. The star may have a mass similar to that of Sol, 93 percent of its diameter, and 65 percent of its luminosity.
For an Earth-type planet around BD -21°5081 to have liquid water at its surface, it would need a stable orbit centered around 0.81 AU -- between the orbital distances of Venus and Earth in the Solar System. Such a planet would have an orbital period less than one Earth year.
(Data from SolStation.com)
- (Johnson and Wright, 1983, page 691)