HD 34445
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Orion |
| Right ascension | 05h 17m 40.98s[1] |
| Declination | +07° 21′ 12.1″[1] |
| Apparent magnitude (V) | 7.32 |
| Characteristics | |
| Spectral type | G0 |
| Apparent magnitude (B) | 7.94 |
| B−V color index | 0.62 |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | –79.4 km/s |
| Proper motion (μ) | RA: -0.46 ± 0.74[1] mas/yr Dec.: -147.17 ± 0.43[1] mas/yr |
| Parallax (π) | 21.52 ± 0.66[1] mas |
| Distance | 152 ± 5 ly (46 ± 1 pc) |
| Absolute magnitude (MV) | 4.05 |
| Details | |
| Mass | 1.07 M☉ |
| Radius | 1.38 R☉ |
| Luminosity | 2.01 L☉ |
| Surface gravity (log g) | 4.21 cgs |
| Temperature | 5836 K |
| Metallicity | +0.14 |
| Rotation | ~22 days |
| Rotational velocity (v sin i) | 2.7 ± 0.5 km/s |
| Age | 8.5 ± 2.0 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 34445 is a 7th magnitude G-type star located approximately 152 light years away in the constellation Orion. This star is larger, hotter, brighter, and more massive than our Sun. Also its metal content is 40% greater than the Sun. In 2004, a gas giant planet was found in orbit around the star. But it wasn’t until 2009 that this planet was confirmed.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥0.79 ± 0.07 MJ | 2.07 ± 0.02 | 1049 ± 11 | 0.27 ± 0.07 | — | — |
See also
References
- 1 2 3 4 5 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
- ↑ Howard, Andrew W.; et al. (2010). "The California Planet Survey. I. Four New Giant Exoplanets". The Astrophysical Journal 721 (2): 1467–1481. arXiv:1003.3488. Bibcode:2010ApJ...721.1467H. doi:10.1088/0004-637X/721/2/1467.
Coordinates: 
05h 17m 40.9786s, +07° 21′ 12.036″
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