NGC 2423-3 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | NGC 2423-3 | |
| Constellation | Puppis | |
| Right ascension | (α) | 07h 37m 09s |
| Declination | (δ) | −13° 54′ 24″ |
| Distance | 2498 ly (766 pc) | |
| Spectral type | K-M III | |
| Orbital elements | ||
| Semi-major axis | (a) | 2.1 AU |
| Periastron | (q) | 1.66 AU |
| Apastron | (Q) | 2.54 AU |
| Eccentricity | (e) | 0.21 ± 0.07 |
| Orbital period | (P) | 714.3 ± 5.3 d |
| Argument of periastron |
(ω) | 18 ± 10° |
| Time of periastron | (T0) | 2,453,213 ± 21 JD |
| Semi-amplitude | (K) | 71.5 m/s |
| Physical characteristics | ||
| Mass | (m) | >10.6 MJ |
| Discovery information | ||
| Discovery date | 21 June 2007 | |
| Discoverer(s) | Mayor et al. | |
| Discovery method | Doppler spectroscopy | |
| Discovery site |  France | |
| Discovery status | Published | |
NGC 2423-3b is an extrasolar planet[1] approximately 2498 light-years away in the constellation of Puppis. The planet was announced in 2007 to be orbiting the red giant star NGC 2423-3 (which in turn is part of the NGC 2423 open cluster). The planet has a mass at least 10.6 times that of Jupiter. Only the minimum mass is known since the orbital inclination is not known, so it may instead be a brown dwarf.
This planet was discovered by Christophe Lovis and Michel Mayor in June 2007. Lovis had also found three Neptune-mass planets orbiting HD 69830 in May 2006, also in Puppis.
See also
References
- ↑ C. Lovis & M. Mayor (2007). "Two substellar companions in the open clusters NGC 2423 and NGC 4349". Astronomy & Astrophysics. 472: 657–664. arXiv:0706.2174
. Bibcode:2007A&A...472..657L. doi:10.1051/0004-6361:20077375.
- SIMBAD NGC 2423 3 b
External links
- "NGC 2423 3". Exoplanet. Retrieved 2008-08-11.
- "Notes for planet NGC 2423 3 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-11.
Coordinates: 
07h 37m 09s, −13° 54′ 24″
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