HD 181433 b

HD 181433 b is an extrasolar planet located approximately 87 light years away^[4] in the constellation of Pavo, orbiting the star HD 181433. This planet has mass at least 7.56 times that of Earth. This planet is classified as a super-Earth and orbits at 0.080 AU and varies only about 0.063 AU with an eccentricity of 0.396.^[3] François Bouchy et al. have published a paper detailing the HD 181433 planetary system in Astronomy and Astrophysics.^[1]

HD 181433 b

Discovery
Discovered by	Bouchy et al.[1]
Discovery site	La Silla Observatory, Chile[2]
Discovery date	June 16, 2008[2]
Detection method	Doppler spectroscopy[2]
Orbital characteristics
Apastron	0.111 AU (16,600,000 km)
Periastron	0.048 AU (7,200,000 km)
Semi-major axis	0.080 AU (12,000,000 km)[3]
Eccentricity	0.396[3]
Orbital period (sidereal)	9.3743[3] d
Average orbital speed	93
Time of periastron	2454542 ± 0.26[3]
Argument of periastron	202 ± 10[3]
Star	HD 181433

References

1. Bouchy, François; Mayor, Michel; Lovis, Christophe; Udry, Stéphane; Benz, Willy; Bertaux, Jean-Loup; Delfosse, Xavier; Mordasini, Christoph; Pepe, Francesco; Queloz, Didier; Ségransan, Damien (2009). "The HARPS Search for Southern Extra-solar Planets. XVII. Super-Earth and Neptune-mass Planets in Multiple Planet Systems HD 47186 and HD 181433". Astronomy and Astrophysics. 496 (2): 527–31. arXiv:0812.1608. Bibcode:2009A&A...496..527B. doi:10.1051/0004-6361:200810669. S2CID 117778593.
2. "A Trio of Super-Earths" (Press release). ESO. 2008-06-16. Archived from the original on 2008-10-07. Retrieved 2008-10-02.
3. Schneider, J. "Notes for Planet HD 181433 b". Extrasolar Planets Encyclopaedia. Retrieved 2008-10-02.
4. van Leeuwen, F. (2007). "HIP 95152". Hipparcos, the New Reduction: The Astrometric Catalogue. Retrieved 2008-10-02.

External links

• "HD 181433 b". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-09.