HD 290327
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 23m 21.56s[1] |
| Declination | –02° 16′ 39.4″[1] |
| Apparent magnitude (V) | 8.96 |
| Characteristics | |
| Spectral type | G5IV |
| Apparent magnitude (B) | 9.69 |
| Apparent magnitude (J) | 7.683 |
| Apparent magnitude (H) | 7.404 |
| Apparent magnitude (K) | 7.271 |
| B−V color index | 0.73 |
| Astrometry | |
| Proper motion (μ) | RA: 34.44±1.54[1] mas/yr Dec.: −96.93±0.99[1] mas/yr |
| Parallax (π) | 17.65 ± 1.57[1] mas |
| Distance | 180 ± 20 ly (57 ± 5 pc) |
| Absolute magnitude (MV) | 5.26 |
| Details | |
| Mass | 0.84 M☉ |
| Radius | 1.02±0.13 R☉ |
| Luminosity | 0.734±0.134 L☉ |
| Surface gravity (log g) | 4.24 cgs |
| Temperature | 5310±100 K |
| Metallicity | -0.11 |
| Other designations | |
BD–02°128, HIP 25191, PPM 175811, SAO 132049 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 290327 is a 9th magnitude G-type subgiant star located approximately 180 light years away in the constellation Orion. This star is larger, cooler, fainter, and less massive than our Sun. Also its metal content is seven-ninths as much as the Sun. In 2009, a gas giant planet was found in orbit around the star.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 2.54+0.17 −0.14 MJ |
3.43+0.20 −0.12 |
2443+205 −117 |
0.08+0.08 −0.03 |
— | — |
See also
- List of extrasolar planets
References
- ↑ 1.0 1.1 1.2 1.3 1.4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- ↑ 2.0 2.1 Naef, D. et al. (2010). "The HARPS search for southern extrasolar planets XXIII. 8 planetary companions to low-activity solar-type stars". Astronomy and Astrophysics 523. A15. arXiv:1008.4600. Bibcode:2010A&A...523A..15N. doi:10.1051/0004-6361/200913616.
Coordinates: 
05h 23m 21.5647s, −02° 16′ 39.428″
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