HD 44219
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Monoceros |
| Right ascension | 06h 20m 14.32s[1] |
| Declination | –10° 43′ 30.0″[1] |
| Apparent magnitude (V) | 7.705 |
| Characteristics | |
| Spectral type | G5 |
| Apparent magnitude (B) | 8.345 |
| Apparent magnitude (J) | 6.509 |
| Apparent magnitude (H) | 6.215 |
| Apparent magnitude (K) | 6.115 |
| B−V color index | 0.640 |
| Astrometry | |
| Radial velocity (Rv) | –12.4 km/s |
| Proper motion (μ) | RA: 73.05±0.84[1] mas/yr Dec.: −17.95±0.66[1] mas/yr |
| Parallax (π) | 19.83 ± 0.78 mas[1] |
| Distance | 164 ± 6 ly (50 ± 2 pc) |
| Absolute magnitude (MV) | 4.192 |
| Details | |
| Mass | 1.01 ± 0.01[2] M☉ |
| Radius | 1.37 ± 0.03[2] R☉ |
| Luminosity | 1.83 ± 0.01[2] L☉ |
| Surface gravity (log g) | 4.17 ± 0.02[2] cgs |
| Temperature | 5749 ± 45[2] K |
| Metallicity [Fe/H] | 0.03 dex |
| Age | 9.6 ± 0.7[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 44219 is an 8th magnitude G-type main sequence star located approximately 164 light years away in the constellation Monoceros. This star is larger, cooler, brighter, and about the same mass as our Sun. Also its metal content is one-fifteenth more than the Sun. In 2009, a gas giant planet was found in orbit around the star.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥ 0.58+0.06 −0.04 MJ |
1.19±0.02 | 472.3+6.3 −5.0 |
0.61+0.07 −0.09 |
— | — |
See also
References
- ^ a b c d e 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
- ^ a b c d e f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
- ^ a b 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.
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