12 Ophiuchi
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| 12 Ophiuchi | |
| Stellar characteristics | |
|---|---|
| Constellation | Ophiuchus |
| 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[1], 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[2].
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)
Notes
- ↑ (Perrin and Karoji, 1987, page 236; and Johnson and Wright, 1983, page 687)
- ↑ (Cayrel de Strobel et al, 1991, page 300)
