HD 76700 b

HD 76700 b is an exoplanet orbiting the G-type main sequence star HD 76700 approximately 198 light years away in the southern constellation Volans. The planet was discovered in 2002, and was announced in 2003.

HD 76700 b
An artist's impression of HD 76700 b orbiting it's host star.
Discovery[1]
Discovered byTinney, Butler,
Marcy et al.
Discovery site Anglo-Australian Telescope
Discovery dateJuly 5, 2002
Radial velocity
Orbital characteristics
Semi-major axis
0.0511 ± 0.0030 AU (7,640,000 ± 450,000 km)[2]
Eccentricity0.10±0.08[3]
3.97097±0.00023 d[3]
2451213.32±0.67 JD[2]
Argument of perihelion
30°[2]
Semi-amplitude27.6±1.7
StarHD 76700
Physical characteristics
Mean radius
0.99 RJ
Mass0.21±0.03 MJ[3]
Surface gravity
5.82 m/s2
Temperature1316+85
−252 K

    Discovery

    In 2002, a group of scientists detected planets around multiple stars, along with HD 76700. Unlike the other planets, HD 76700 b has a short and circular orbit. However, according to the newest data, the planet's orbit may be slightly eccentric.

    Properties

    Due to the planet's high mass, it's a gas giant similar to Saturn. HD 76700 b was detected indirectly, so properties such as its radius, inclination, and temperature is unknown. HD 76700 b has a short 4 day orbit around its host due to it being 8 times closer than Mercury is to the Sun.

    References
    1. Tinney, C. G.; et al. (2003). "Four New Planets Orbiting Metal-enriched Stars". The Astrophysical Journal. 587 (1): 423–428. arXiv:astro-ph/0207128. Bibcode:2003ApJ...587..423T. doi:10.1086/368068.
    2. Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
    3. Stassun, Keivan G.; Collins, Karen A.; Gaudi, B. Scott (1 March 2017). "Accurate Empirical Radii and Masses of Planets and Their Host Stars with Gaia Parallaxes". The Astronomical Journal. 153: 136. arXiv:1609.04389. doi:10.3847/1538-3881/aa5df3. ISSN 0004-6256.
    • "HD 76700". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-11-04.
    • "HD 76700 b". Exoplanet Kyoto. Retrieved 2021-08-13.{{cite web}}: CS1 maint: url-status (link)

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