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|Right ascension (Epoch J2000)||16h 36m 21.4s|
|Declination (Epoch J2000)||-02° 19' 28.5"|
|Spectral type||K0-2 Ve|
|Distance from Sol||31.9 ly|
|Other designations||12 Ophiuchi include: V2133 Oph, 12 Oph, HR 6171*, Gl 631, Hip, 81300, HD 149661, BD-01 3220, BD-02 4211, SAO 141269, FK5 1433, LHS 3224, LTT 6632, LFT 1294, LPM 614.|
12 Ophiuchi is located about 31.9 light-years away from our Sun, Sol, within the east central corner of the constellation Ophiuchus, the Serpent Holder or Snake Charmer. 12 Ophiuchi is a main-sequence orange-red dwarf star of spectral and luminosity type K0-2 Ve. The star may have around 90 percent of Sol's mass, 85 to 100 percent of its diameter, and around 39 percent of its luminosity. It appears to be as enriched than Sol in elements heavier than hydrogen ("metals") with about 102 percent of Sol's abundance of iron.
The distance from 12 Ophiuchi where an Earth-type planet would be "comfortable" with liquid water is centered around only 0.64 AU -- inside the orbital distance of Venus in the Solar System -- where a planet probably would have an orbital period around half an Earth year.
(Data from SolStation.com)
- (Perrin and Karoji, 1987, page 236; and Johnson and Wright, 1983, page 687)
- (Cayrel de Strobel et al, 1991, page 300)