| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Ara |
| Right ascension | 17h 28m 39.9463s |
| Declination | –46° 53′ 42.685″ |
| 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: 573.32 ± 1.89 mas/yr Dec.: -879.84 ± 0.82 mas/yr |
| Parallax (π) | 220.25 ± 1.59 mas |
| Distance | 14.8 ± 0.1 ly (4.54 ± 0.03 pc) |
| Absolute magnitude (MV) | 11.06 |
| Details | |
| Mass | 0.35 M☉ |
| Radius | 0.41-0.43 R☉ |
| Surface gravity (log g) | 570 m/s2 (58.1 g) |
| Luminosity | 0.0032 L☉ |
| Temperature | 3600 ± 100 K |
| Metallicity | -0.28 |
| Age | 0.55 ± 0.45 G years |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
Gliese 674 (Gliese-Jahreiss 674) is a red dwarf star approximately 15 light years away in the southern constellation of Ara.
Contents |
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.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | >0.037 MJ | 0.039 | 4.6938 ± 0.007 | 0.2 ± 0.02 |
See also
External links
- "Gliese 674". nStars database entry. http://nstars.arc.nasa.gov/searches/starinfo.cfm?partb=1728m4653&starpage=0.
- "Gliese 674". SolStation. http://www.solstation.com/stars/gl674.htm.
- "Notes for star GJ 674". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=GJ+674.
References
- GJ 674 Catalog
- Image Gliese 674
- GJ 674
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