}}{{Starbox reference
| Simbad = HD+102195
| EPE = HD+102195
}}{{Starbox end}}HD 102195 is an orange-hued star in the zodiac constellation of Virgo with a confirmed exoplanet companion.[3] With an apparent visual magnitude of 8.07,[3] the star is too faint to be seen with the naked eye. The distance to HD 102195 can be estimated from its annual parallax shift of {{Val|34.06|ul=mas}},[1] yielding a separation of 95.8 light years. It is moving further away from the Earth with a heliocentric radial velocity of 1.85 km/s.[1] This is a high proper motion star and a possible member of the η Cha stellar kinematic group.[20]This K-type main-sequence star has a stellar classification of K0 V.[4] It is a quasi-periodic variable star with a cycle of 11.5 days, a variation range of 3.65%, and a phased amplitude of 94%.[22] HD 102195 is around six billion years old with a rotation period of 12.3 days.[14] It has 88% of the Sun's mass and 84% of the Sun's radius. It is radiating 49% of the Sun's luminosity from its photosphere at an effective temperature of 5,283 K.[11]
In 2005, an orbiting companion was detected using the Exoplanet Tracker instrument.[3] This near Jupiter-mass exoplanet has an orbital period of 4.1 days with a circular orbit. By comparing the rotation period and radius of the star with the projected rotational velocity, Melo et al. (2007) derived an orbital inclination of 47°. This would suggest a planetary mass of {{Val|0.62|ul=Jupiter mass}}.[3]
{{OrbitboxPlanet begin
| table_ref = [3]
}}{{OrbitboxPlanet
| exoplanet = b
| mass = ≥0.45
| period = {{Val|4.113775|0.000557}}
| semimajor = 0.0491[28]
| eccentricity = 0.0 (assumed)
}}{{Orbitbox end}} See also
- List of extrasolar planets
References
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7. ^1 {{cite journal | title=K2 Variable Catalogue: Variable stars and eclipsing binaries in K2 campaigns 1 and 0 | display-authors=1 | last1=Armstrong | first1=D. J. | last2=Kirk | first2=J. | last3=Lam | first3=K. W. F. | last4=McCormac | first4=J. | last5=Walker | first5=S. R. | last6=Brown | first6=D. J. A. | last7=Osborn | first7=H. P. | last8=Pollacco | first8=D. L. | last9=Spake | first9=J. | journal=Astronomy & Astrophysics | volume=579 | id=A19 | pages=6 | date=July 2015 | doi=10.1051/0004-6361/201525889 | bibcode=2015A&A...579A..19A | arxiv=1502.04004 }}
8. ^1 2 3 4 5 6 7 8 9 {{cite journal | title=A new Neptune-mass planet orbiting HD 219828 | display-authors=1 | last1=Melo | first1=C. | last2=Santos | first2=N. C. | last3=Gieren | first3=W. | last4=Pietrzynski | first4=G. | last5=Ruiz | first5=M. T. | last6=Sousa | first6=S. G. | last7=Bouchy | first7=F. | last8=Lovis | first8=C. | last9=Mayor | first9=M. | last10=Pepe | first10=F. | last11=Queloz | first11=D. | last12=da Silva | first12=R. | last13=Udry | first13=S. | journal=Astronomy and Astrophysics | volume=467 | issue=2 | date=May 2007 | pages=721–727 | doi=10.1051/0004-6361:20066845 | bibcode=2007A&A...467..721M | arxiv=astro-ph/0702459 }}
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