HD 153950 b

HD 153950 b

Extrasolar planet		List of extrasolar planets
Parent star
Star		HD 153950
Constellation		Scorpius
Right ascension	(α)	17h 04m 30.8715s
Declination	(δ)	–43° 18′ 35.172″
Apparent magnitude	(mV)	7.39
Distance		162 ± 5.9 ly (49.6 ± 1.8 pc)
Spectral type		F8V
Orbital elements
Semimajor axis	(a)	1.28 ± 0.01 AU (191 ± 1 Gm)
Eccentricity	(e)	0.34 ± 0.021
Orbital period	(P)	499.4 ± 3.6 d (1.367 ± 0.010 y)
Orbital speed	(υ)	28.0 km/s
Argument of periastron	(ω)	308.2 ± 2.4°
Time of periastron	(T0)	2,454,502 ± 4.1 JD
Physical characteristics
Minimum mass	(m sin i)	2.73 ± 0.05 MJ (868 ± 16 M⊕)
Discovery information
Discovery date		October 26, 2008
Discoverer(s)		Moutou et al.
Detection method		Doppler spectroscopy (HARPS)
Discovery site		La Silla Observatory
Discovery status		Published
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data

HD 153950 b is an extrasolar planet located approximately 162 light-years away in the constellation of Scorpius, orbiting the 7th magnitude F-type main sequence star HD 153950. This planet has mass about 2.73 times that of Jupiter, but because the inclination is not known, the mass value is only minimum. So in next decade, the Gaia mission, Space Interferometry Mission, or James Webb Space Telescope will determine the inclination of every known extrasolar planets, including this planet. This planet takes about 499 days to orbit at an orbital distance about 1.28 AU and range from 0.84 to 1.72 AU, corresponding to the orbital eccentricity of 0.34.

This planet was discovered on October 26, 2008 by Moutou et al. using the HARPS spectrograph on ESO’s 3.6 meter telescope installed at La Silla Observatory in Atacama desert, Chile.

See also

• BD-17°63 b
• HD 131664
• HD 143361 b
• HD 145377 b
• HD 20868 b
• HD 43848
• HD 48265 b
• HD 73267 b

References

• Moutou et al.; Mayor, M.; Lo Curto, G.; Udry, S.; Bouchy, F.; Benz, W.; Lovis, C.; Naef, D. et al (2009). "The HARPS search for southern extra-solar planets XVII. Six long-period giant planets around BD -17 0063, HD 20868, HD 73267, HD 131664, HD 145377, HD 153950" (abstract). Astronomy and Astrophysics 496 (2): 513–519. Bibcode 2009A&A...496..513M. doi:10.1051/0004-6361:200810941. http://www.aanda.org/index.php?option=article&access=doi&doi=10.1051/0004-6361:200810941. (web Preprint)

External links

• "HD 153950 b". Exoplanets. http://media4.obspm.fr/exoplanets/base/planete.php?etoile=HD+153950&planete=b.