HD 49674
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 51m 30.514s[1] |
| Declination | +40° 52′ 03.92″[1] |
| Apparent magnitude (V) | 8.1 |
| Characteristics | |
| Spectral type | G5V |
| B−V color index | 0.729 |
| Astrometry | |
| Radial velocity (Rv) | 11.8 ± 0.3 km/s |
| Proper motion (μ) | RA: 32.23 ± 0.97[1] mas/yr Dec.: −122.70 ± 0.69[1] mas/yr |
| Parallax (π) | 22.61 ± 0.87[1] mas |
| Distance | 144 ± 6 ly (44 ± 2 pc) |
| Absolute magnitude (MV) | 8.81 |
| Details | |
| Mass | 1.07 ± 0.02[2] M☉ |
| Radius | 1.01 ± 0.01[2] R☉ |
| Luminosity | 0.96 ± 0.01[2] L☉ |
| Surface gravity (log g) | 4.46 ± 0.02[2] cgs |
| Temperature | 5702 ± 28[2] K |
| Age | 1.8 ± 1.2[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
HD 49674 is an 8th magnitude G-type main-sequence star (spectral type G5V) located approximately 144 light years away in the constellation of Auriga. It has a very similar mass to our Sun. It is orbited by a recently discovered planet.[3]
Planetary system
At the time of discovery of the planet HD 49674 b in 2002, it was the least massive planet known, very close to the boundary between sub-Jupiter mass and Neptune-mass at 0.1 MJ. This planet orbits very close to the star.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.105 ± 0.011 MJ | 0.0580 ± 0.0034 | 4.94737 ± 0.00098 | 0.087 ± 0.095 | — | — |
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 - 1 2 3 4 5 6 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.
- ↑ Butler, R. Paul; et al. (2003). "Seven New Keck Planets Orbiting G and K Dwarfs". The Astrophysical Journal. 582 (1): 455–466. Bibcode:2003ApJ...582..455B. doi:10.1086/344570.
- ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links
- "Notes for star HD 49674". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-23.
- HIP 32916 Catalog
- Image HD 49674
Coordinates: 
06h 51m 30.5164s, +40° 52′ 03.923″
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