4 Ursae Majoris b

Planetbox begin
name = 4 Ursae Majoris b Planetbox star
star = 4 Ursae Majoris
constell = Ursa Major
RA = RA|08|40|12.8
DEC = DEC|+64|19|40
dist_ly = 252
dist_pc = 77
class = K1+IIIbPlanetbox orbit
semimajor = 0.87 ± 0.04
eccentricity = 0.432 ± 0.024
period = 269.3 ± 1.96
ang_dist = 13.945
long_peri = 23.81 ± 4.42
t_peri = 2,452,987.3936 ± 4.31
semi-amp = 215.6 ± 7.1 Planetbox character
mass = >7.1 ± 1.6
radius = >0.95Planetbox discovery
discovery_date = 28 March 2007
discoverers = Doellinger et al.
discovery_method = Doppler Spectroscopy
discovery_status = Published Planetbox catalog
names = Pi² Ursae Majoris b, HD 73108 b, HIP 42527 b, HR 3403 b, SAO 14616 b

4 Ursae Majoris b, also known as Pi² Ursae Majoris b, is an extrasolar planet orbiting the star 4 Ursae Majoris, approximately 252 light-years away in the constellation of Ursa Major. The mass is calculated to be over 7 times more than Jupiter, classifying as mid-superjovian (Ib). It eccentrically orbits the star a little bit closer than Earth to the Sun, but it takes only three-fourths of a year in period. This makes the orbital velocity 12% faster than the Earth.

It has a fast semi-amplitude of 215.6 m/s because the planet is a mid-superjovian that orbits slightly closer than Earth to the star. The radius is probably slightly smaller than Jupiter and has a very strong gravitational pull.

See also

* Epsilon Tauri b
* 47 Ursae Majoris b
* Pi Mensae b

References

*

External links

*cite web |url=http://exoplanet.eu/planet.php?p1=4+Uma&p2=b |title=4 Uma b |accessdate=2008-06-09 |work=The Extrasolar Planets Encyclopaedia |date=2007-03-28