HD 221287 b

Planetbox begin
name = HD 221287 b Planetbox star
star = HD 221287
constell = Tucana
RA = RA|23|31|20.3389
DEC = DEC|–58|12|35.038
dist_ly = 172.502
dist_pc =52.889
class = F7VPlanetbox orbit
semimajor = 1.25 ± 0.04
semimajor_gigameter = 187
periastron = 1.15
periastron_gigameter = 172
apastron = 1.35
apastron_gigameter = 202
eccentricity = 0.08 ± 0.11
period = 456.1 ± 6.5
period_year = 1.2487
ang_dist = 23.629
long_peri = 98 ± 72
t_peri = 2,453,263 ± 100
semi-amp = 71 ± 13Planetbox character
mass = >3.12 ± 0.78
mass_earth = 992 Planetbox discovery
discovery_date = March 5, 2007
discovery_site = flag|Chile
discoverers = Naef et al.
discovery_method = HARPS
discovery_status=Published

HD 221287 b is an exoplanet approximately 173 light years away in the constellation of Tucana. This planet has mass >3.12 M_J (>992 M_⊕) and orbits at 1.25 AUs or 6.06 μpc from the star, taking 1.25 years to orbit at 29.9 km/s around the star. Naef discovered this planet in early 2007 by using HARPS spectrograph located in Chile.

References

* ( [http://arxiv.org/abs/0704.0917 web preprint] )

External links

*cite web|url=http://exoplanet.eu/planet.php?p1=HD+221287&p2=b|title=Notes for planet HD 221287 b|work=The Extrasolar Planets Encyclopaedia|accessdate=2008-07-21