HD 30177 b

Planetbox begin
name = HD 30177 bPlanetbox star
star = HD 30177
constell = Dorado
RA = RA|04|41|54.3731
DEC = DEC|–58|01|14.725
dist_ly = 178.4
dist_pc = 54.7
class = G8VPlanetbox orbit
semimajor = 3.95±0.05
semimajor_gigameter = 591
periastron = 3.19
periastron_gigameter = 477
apastron = 4.71
apastron_gigameter = 705
eccentricity = 0.193±0.025
period = 2770±100
period_year = 7.58
period_megasecond = 239
speed = 15.6
ang_dist = 72.212
long_peri = 34±15
t_peri = 2451437±72
semi-amp = 146.8±2.8Planetbox character
mass = >10.52±0.20
radius = ~0.9899
density = ~14380
gravity_earth = ~28.34
gravity = ~278.0
temperature = ~132Planetbox discovery
discovery_date = June 13, 2002
discoverers = Tinney, Butler, Marcy "et al"
discovery_method = radial velocity
discovery_site = Anglo-Australian Planet Search
discovery_status = Published Planetbox catalog
names = HIP 111143 b

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 radial velocity method. It is even more massive than Pi Mensae b, but not as massive as HD 114762 b and HD 136118 b. This planet by mass is classified as massive superjovian. In addition, the planet orbits far from the star, about 4 AU away, taking 2770 days (7.58 years) to orbit the star. Even if the massive planet is orbiting at 4 AU from the star, semi-amplitude is high, around 146.8±2.8 m/s. Since if inclination is not known, this planet would likely be a brown dwarf instead.

On June 13, 2002 this planet was discovered by Tinney, Butler, and Marcy "et al" using the Doppler spectroscopy from the Anglo-Australian Telescope.

See also

* Pi Mensae b

References

*cite journal | url=http://www.journals.uchicago.edu/doi/full/10.1086/368068 | author=Tinney "et al." | title=Four New Planets Orbiting Metal-enriched Stars | journal=The Astrophysical Journal | volume=587 | issue=1 | year=2003 | pages=423 – 428 | doi=10.1086/368068
*cite journal|url=http://www.journals.uchicago.edu/doi/abs/10.1086/504701|author=Butler "et al." | title=Catalog of Nearby Exoplanets | journal=The Astrophysical Journal | volume=646 | issue=1 | pages=505 – 522 | year=2006 | doi=10.1086/504701 ( [http://xxx.lanl.gov/abs/astro-ph?papernum=0607493 web Preprint] )

External links

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