|
m →Planetary system: Journal cites:, added 1 Bibcodes, using AWB (7670)
|
||
Line 52: | Line 52: | ||
{{OrbitboxPlanet begin |
{{OrbitboxPlanet begin |
||
| table_ref = <ref name="Niedzielski">{{cite journal | url=http://www.iop.org/EJ/abstract/0004-637X/693/1/276 | author=Niedzielski ''et al.'' | title=A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272 |
| table_ref = <ref name="Niedzielski">{{cite journal | url=http://www.iop.org/EJ/abstract/0004-637X/693/1/276 | author=Niedzielski ''et al.'' | title=A Planet in a 0.6 AU Orbit Around the K0 Giant HD 102272 |
||
| journal=The [[Astrophysical Journal]] | volume=693 | issue=1 | pages=276–280 | year=2009 | format=abstract | doi=10.1088/0004-637X/693/1/276}} ([http://arxiv.org/abs/0810.1710 web preprint])</ref>}} |
| journal=The [[Astrophysical Journal]] | volume=693 | issue=1 | pages=276–280 | year=2009 | format=abstract | doi=10.1088/0004-637X/693/1/276 | bibcode=2009ApJ...693..276N}} ([http://arxiv.org/abs/0810.1710 web preprint])</ref>}} |
||
{{OrbitboxPlanet |
{{OrbitboxPlanet |
||
| exoplanet = [[HD 102272 b|b]] |
| exoplanet = [[HD 102272 b|b]] |
Observation data Epoch J2000.0 (ICRS) Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Leo |
Right ascension | 11h46m 23.5351s[1] |
Declination | +14° 07′ 26.350″[1] |
Apparent magnitude (V) | 8.71[1] |
Characteristics | |
Spectral type | K0 [2] |
U−B color index | 0.69 [2] |
B−V color index | 1.00[1] |
Astrometry | |
Proper motion (μ) | RA: −7.88[1] mas/yr Dec.: 7.41[1] mas/yr |
Parallax (π) | 2.76 ± 1.11 mas[1] |
Distance | 1200±300 ly (360±90[3] pc) |
Absolute magnitude (MV) | ~1[4] |
Details | |
Mass | 1.9 ± 0.3 [2] M☉ |
Radius | 10.1 ± 4.6 [2] R☉ |
Surface gravity (log g) | 3.07 ± 0.12 [2] cgs |
Temperature | 4908 ± 35 [2] K |
Metallicity | [Fe/H] = −0.26 ± 0.08 [2] |
Rotation | ~170 days [2] |
Other designations | |
HIP 57428 | |
Database references | |
SIMBAD | data |
HD 102272 is a K-type giant star approximately 1,200 light-years away in the constellationofLeo. As of 2008[update], two extrasolar planets are known to orbit the star.[3]
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.[2]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | >5.9 ± 0.2 MJ | 0.614 ± 0.001 | 127.58 ± 0.30 | 0.05 ± 0.04 | — | — |
c | >2.6 ± 0.4 MJ | 1.57 ± 0.05 | 520 ± 26 | 0.68 ± 0.06 | — | — |
{{cite journal}}
: Explicit use of et al. in: |author=
(help) (web preprint)
This star-related article is a stub. You can help Wikipedia by expanding it. |