HD 102272

Starbox begin
name = HD 102272Starbox observe
epoch = J2000.0 (ICRS)
constell = Leo
ra = RA|11|46|23.5351SIMBAD link|HD+102272|HD 102272, entry, SIMBAD. Accessed on line June 18, 2008.]
dec = DEC|+14|07|26.350
appmag_v = 8.71Starbox character
class = K0 [http://luth7.obspm.fr/~schneider/HD_102272a.pdf A Planetary System Around the K0 Giant HD 102272] , A. Niedzielski et al., preprint. Submitted to "Astrophysical Journal Letters". Accessed on line June 18, 2008.]
b-v = 1.00
u-b = 0.69Starbox astrometry
prop_mo_ra = −7.88
prop_mo_dec = 7.41
parallax = 2.76
p_error = 1.11
parallax_footnote =
dist_ly = 1200±300
dist_pc = 360±90cite web |url=http://exoplanet.eu/star.php?st=HD+102272 |title=Notes for star HD 102272 |accessdate=2008-07-01 |work=The Extrasolar Planets Encyclopaedia |publisher= |date= ]
absmag_v = ~1 [From apparent magnitude and parallax.] Starbox detail
source =
mass = 1.9 ± 0.3
radius = 10.1 ± 4.6
gravity = 3.07 ± 0.12
luminosity =
temperature = 4908 ± 35
metal = [Metallicity| [Fe/H] = −0.26 ± 0.08
rotation = ~170 days
age = Starbox reference
Simbad = HD+102272
ARICNS =

HD 102272 is a K-type giant star approximately 1,200 light-years away in the constellation of Leo. As of 2008, two extrasolar planets are known to orbit the star.

Planetary system

In June 2008, the discovery of two extrasolar planets orbiting the star was announced. The planets were discovered using the radial velocity method and the Hobby-Eberly Telescope. The radial velocity data clearly shows the presence of the inner planet (HD 102272b.) Although there is evidence for another planet, there is insufficient data to unambiguously determine its orbit.

PlanetboxOrbit
exoplanet = b
mass = >5.9 ± 0.2
period = 127.58 ± 0.30
semimajor = 0.614 ± 0.001
eccentricity = 0.05 ± 0.04PlanetboxOrbit
exoplanet = c
mass = >2.6 ± 0.4
period = 520 ± 26
semimajor = 1.57 ± 0.05
eccentricity = 0.68 ± 0.06

References

External links

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