70 Virginis b

Planetbox begin
name = 70 Virginis b Planetbox image


caption = 70 Virginis b "(Artist's impression)"Planetbox star
star = 70 Virginis
constell = Virgo
RA = RA|13|28|25.8
DEC = DEC|+13|46|43.5
dist_ly = 59.1
dist_pc = 18.1
class = G2.5VaPlanetbox orbit
semimajor = 0.484 ± 0.028
eccentricity = 0.4007 ± 0.0035
period = 116.6884 ± 0.0044
period_year =
inclination =
ang_dist = 26.726
long_peri = 358.71 ± 0.54
t_peri = 2,447,239.82 ± 0.21
semi-amp = 316.3 ± 1.7 Planetbox character
mass = >7.49 ± 0.61Planetbox discovery
discovery_date = 17 January 1996
discoverers = Geoffrey Marcy
R. Paul Butler
discovery_method = Doppler Spectroscopy
discovery_site = flag|United States
discovery_status = Confirmed Planetbox catalog
names = HD 117176 b, HR 5072 b, "Goldilocks"

70 Virginis b is an extrasolar planet approximately 60 light-years away in the constellation of Virgo. Announced in 1996 by Geoffrey Marcy and R. Paul Butler, 70 Virginis was one of the first stars confirmed to have planets orbiting it. When first announced, 70 Virginis b was considered to be within its star's habitable zone (preferably in the "Goldilocks zone"), but would later be confirmed that the planet has an eccentric orbit, closer to its parent.

Characteristics

70 Virginis b is an eccentric Jupiter type extrasolar planet which orbits its sun every 116 days with 7.5 times the mass of Jupiter, its surface Gravity must be very high nearly as much as the Sun. At the time of discovery in January 1996, it was believed that the star was only 29 ly away resulting in the star being less luminous based on its apparent magnitude. As a result the planet's orbit was thought to be in the habitable zone and the planet was nicknamed Goldilocks (not too cold or too hot).Cite news | first = Corey | last = Powell | title = A Parade of New Planets | publisher = Scientific American | date = 1996-05-27 | url = http://www.sciam.com/article.cfm?articleID=000BAF7C-7457-1C76-9B81809EC588EF21 | accessdate = 2007-05-13] The Hipparcos satellite later showed that the star was more distant and therefore brighter resulting in the planet being too hot to be in the habitable zone. [cite journal | author=Perryman, M. A. C., "et al." | title=Hipparcos distances and mass limits for the planetary candidates: 47 Ursae Majoris, 70 Virginis, 51 Pegasi | url=http://adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996A%26A...310L..21P&link_type=ARTICLE&db_key=AST&high=41f529900e10089| journal=Astron. Astrophys. | year=1996 | volume=310 | pages=L21–L24]

See also

*51 Pegasi b
*Tau Boötis b
*55 Cancri b
*47 Ursae Majoris b
*Upsilon Andromedae b

References

External links

* [http://www.solstation.com/stars2/70virgin.htm SolStation: 70 Virginis]
* [http://exoplanet.eu/star.php?st=70+Vir Extrasolar Planets Encyclopaedia 70 Virginis]
* [http://www.extrasolar.net/planettour.asp?StarCatId=normal&PlanetId=22 70 Virginis b]