HD 30177 b

HD 30177 b
Exoplanet List of exoplanets
Parent star
Star HD 30177
Constellation Dorado
Right ascension (α) 04h 41m 54.3731s
Declination (δ) –58° 01′ 14.725″
Apparent magnitude (mV) 8.41
Distance178.4 ly
(54.7 pc)
Spectral type G8V
Orbital elements
Semi-major axis(a) 3.95 ± 0.05 AU
Eccentricity (e) 0.193 ± 0.025
Orbital period(P) 2770 ± 100 d
Argument of
periastron		 (ω) 34 ± 15°
Time of periastron (T0) 2451437 ± 72 JD
Semi-amplitude (K) 146.8 ± 2.8 m/s
Physical characteristics
Minimum mass(m sin i)10.52 ± 0.20 MJ
Discovery information
Discovery date June 13, 2002[1]
Discoverer(s) Tinney, Butler, Marcy et al.
Discovery method radial velocity
Discovery site Anglo-Australian Planet Search
Discovery status Published[2]

HD 30177 b is an extrasolar planet located approximately 178 light-years away in the constellation of Dorado, orbiting the star HD 30177. This is one of the most massive planets ever detected by the radial velocity method. In addition, the planet orbits far from the star, about 4 AU away, taking 2770 days (7.58 years) to orbit the star. Even though the massive planet is orbiting at 4 AU from the star, the radial velocity semi-amplitude is high, around 146.8±2.8 m/s. Since the inclination (and thus the true mass) is not known, this planet candidate may in fact be a brown dwarf.

This planet was discovered on June 13, 2002[1] by Tinney, Butler, and Marcy et al. using the Doppler spectroscopy from the Anglo-Australian Telescope.[2][3]

See also

References

  1. 1 2 Tinney, Chris (2007-09-07). "AAPS Discovered Planets". Anglo-Australian Planet Search. University of New South Wales. Retrieved 2018-04-17.
  2. 1 2 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.
  3. ↑ 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.
  • "Notes for planet HD 30177 b". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-29.
  • "HD 30177". Exoplanets. Retrieved 2008-08-29.

Coordinates: 04h 41m 54.3731s, −58° 01′ 14.725″


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