NGC 2423-3 b

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″
Distance2498 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

  1. ↑ 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.
  • "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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