23 Librae
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Libra |
| Right ascension | 15h 13m 28s |
| Declination | -25° 18' 33" |
| Apparent magnitude (V) | 6.45 |
| Distance | 81 ly (25 pc) |
| Spectral type | G5V |
| Other designations | |
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HD 134987
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23 Librae (23 Lib) is a yellow dwarf star in the constellation Libra. 23 Lib has a mass of 1.05 suns and a radius of 1.25 suns. In 1999 an exoplanet was announced orbiting 23 Lib.
Contents |
[edit] Planet
[edit] 23 Librae b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.820±0.047 AU |
| Eccentricity | (e) | 0.243±0.011 |
| Orbital period | (P) | 258.31±0.16 d |
| Angular distance | (θ) | 31 mas |
| Longitude of periastron |
(ω) | 358.3±3.7° |
| Time of periastron | (T0) | 2,450,331.7±2.2 JD |
| Semi-amplitude | (K) | 49.52±.57 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.62±0.13 MJ |
| Discovery information | ||
| Discovery date | 1999 | |
| Discoverer(s) | Vogt et al. | |
| Detection method | Radial velocity | |
| Discovery status | Published | |
23 Librae b (23 Lib b) is an extrasolar jovian planet discovered in 1999 orbiting the star 23 Librae. It orbits in its star's habitable zone, with temperatures similar to Venus.
[edit] References
- Vogt et al. (2000). "Six New Planets from the Keck Precision Velocity Survey". The Astrophysical Journal 536 (2): 902 – 914. doi:.
- Butler et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505 – 522. doi:. (web Preprint)
[edit] External links
- HD 134987 -- High proper-motion Star (SIMBAD Query Result)
- Star: HD 134987 (EPE)
- 23 Librae (Extrasolar Visions)
- 23 Librae b (Extrasolar Visions)
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