NGC 2423-3 b

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.

NGC 2423-3 b
Discovery
Discovered byMayor et al.
Discovery site France
Discovery date21 June 2007
Doppler spectroscopy
Orbital characteristics
Apastron2.54 AU (380,000,000 km)
Periastron1.66 AU (248,000,000 km)
2.1 AU (310,000,000 km)
Eccentricity0.21 ± 0.07
714.3 ± 5.3 d
2,453,213 ± 21
18 ± 10
Semi-amplitude71.5
StarNGC 2423-3
Physical characteristics
Mass>10.6 MJ

    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

    • NGC 4349-127 b
    • PSR B1620-26 b

    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.


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