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{{Starbox begin
| name = HD 102272
}}{{Starbox observe
| epoch = J2000.0 (ICRS)
| constell = Leo
| ra = {{RA|11|46|23.54}}[1]
| dec = {{DEC|+14|07|26.3}}[1]
| appmag_v = 8.71[1]
}}{{Starbox character
| class = K0
| b-v = 1.00[1]
| u-b = 0.69
}}{{Starbox astrometry
| prop_mo_ra = -6.54 ± 1.43[1]
| prop_mo_dec = 6.21 ± 0.76[1]
| parallax = 4.10
| p_error = 0.97
| parallax_footnote = [1]
| absmag_v = ~1[2]
}}{{Starbox detail
| source =
| mass = 1.9 ± 0.3
| radius = 10.1 ± 4.6
| gravity = 3.07 ± 0.12
| luminosity =
| temperature = 4908 ± 35
| metal = [Fe/H] = −0.26 ± 0.08
| rotation = ~170 days
| age =
}}{{starbox catalog
| names = HIP 57428, SAO 99784, BD+14 2434[1]
}}{{Starbox reference
| Simbad = HD+102272
| ARICNS =
}}{{Starbox end}}HD 102272 is a K-type giant star approximately 800 light-years away in the constellation of Leo. {{As of|2008}}, two extrasolar planets are known to orbit the star.[3] Planetary system In June 2008, the discovery of two extrasolar planets orbiting the star was announced.[3] 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 102272 b.) Although there is evidence for another planet, there is insufficient data to unambiguously determine its orbit. {{OrbitboxPlanet begin
| table_ref =
}}{{OrbitboxPlanet
| exoplanet = b
| mass = >5.9 ± 0.2
| period = 127.58 ± 0.30
| semimajor = 0.614 ± 0.001
| eccentricity = 0.05 ± 0.04
}}{{OrbitboxPlanet
| exoplanet = c
| mass = >2.6 ± 0.4
| period = 520 ± 26
| semimajor = 1.57 ± 0.05
| eccentricity = 0.68 ± 0.06
}}{{Orbitbox end}} References 1. ^1 2 {{SIMBAD link|HD+102272|HD 102272}}, entry, SIMBAD. Accessed on line June 18, 2008.
2. ^From apparent magnitude and parallax.
3. ^1 {{cite 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 |date= }}
4. ^1 2 3 4 5 {{cite journal | url=http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 }} Vizier catalog entry
[4]
}} External links - {{cite 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 |date= }}
- {{cite web | url=http://media4.obspm.fr/exoplanets/base/etoile.php?nom=HD+102272 | title=HD 102272 | work=Exoplanets |accessdate=2008-11-09 }}
{{-}}{{Sky|11|46|23.5351|+|14|07|26.350|1200}}{{Stars of Leo}}{{giant-star-stub}} 6 : Henry Draper Catalogue objects|Hipparcos objects|Leo (constellation)|K-type giants|Planetary systems with two confirmed planets|Durchmusterung objects |