Gliese 674
- Not to be confused with Gliese 676.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 28m 39.945s [1] |
| Declination | –46° 53′ 42.69″ [1] |
| Apparent magnitude (V) | 9.38 |
| Characteristics | |
| Spectral type | M3V |
| U−B color index | 1.22 |
| B−V color index | 1.55 |
| R−I color index | 1.03 |
| Astrometry | |
| Radial velocity (Rv) | -10.5 ± 1.3 km/s |
| Proper motion (μ) | RA: 571.26 ± 1.77[1] mas/yr Dec.: -880.83 ± 0.74[1] mas/yr |
| Parallax (π) | 220.24 ± 1.42[1] mas |
| Distance | 14.81 ± 0.10 ly (4.54 ± 0.03 pc) |
| Absolute magnitude (MV) | 11.06 |
| Details | |
| Mass | 0.35 M☉ |
| Radius | 0.41-0.43 R☉ |
| Luminosity | 0.016 L☉ |
| Surface gravity (log g) | 570 m/s2 (58.1 g) cgs |
| Temperature | 3600 ± 100 K |
| Metallicity | -0.28 |
| Rotation | 32.9±0.1 d[2] |
| Age | 0.55 ± 0.45 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | The star |
| b | |
| Exoplanet Archive | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
Gliese 674 (Gliese–Jahreiß 674) is a pre-main-sequence red dwarf approximately 15 light years away in the southern constellation of Ara.
Planetary system
On January 7, 2007, Bonfils used the HARPS spectrograph in ESO and found an intermediate mass planet orbiting close to the red dwarf star in an unusually eccentric orbit.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥11.8 M⊕ | 0.039 | 4.6938 ± 0.007 | 0.2 ± 0.02 | — | — |
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 - ↑ Suárez Mascareño, A.; et al. (September 2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745−2756, arXiv:1506.08039, Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441.
- ↑ Bonfils, X.; et al. (2007). "The HARPS search for southern extra-solar planets. X. A m sin i = 11 M_⊕ planet around the nearby spotted M dwarf GJ 674". Astronomy and Astrophysics. 474 (1): 293–299. arXiv:0704.0270. Bibcode:2007A&A...474..293B. doi:10.1051/0004-6361:20077068.
External links
- "Gliese 674". nStars database entry. Archived from the original on April 28, 2005.
- "Gliese 674". SolStation.
- GJ 674 Catalog
- Image Gliese 674
Notes
Coordinates: 
17h 28m 39.9463s, −46° 53′ 42.685″
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