Gliese 674
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 28m 39.9455s[1] |
| Declination | –46° 53′ 42.6932″[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: 572.582±0.102[1] mas/yr Dec.: −880.251±0.068[1] mas/yr |
| Parallax (π) | 219.8012 ± 0.0487[1] mas |
| Distance | 14.839 ± 0.003 ly (4.550 ± 0.001 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[citation needed] red dwarf approximately 15 light years away in the southern constellation of Ara. Gliese 674, as is typical for young red dwarfs, is strongly active, with regular ultraviolet flares. As of 2019, the strongest ultraviolet flare detected had a total energy of 5.6*1023 joules and a duration of a few hours.[3]
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.[4]
| 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[]
- List of nearest stars
- List of extrasolar planets
References[]
- ^ Jump up to: a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ 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, S2CID 119181646.
- ^ Froning, C. S.; Kowalski, A.; France, K.; Parke Loyd, R. O.; Christian Schneider, P.; Youngblood, A.; Wilson, D.; Brown, A.; Berta-Thompson, Z.; Sebastian Pineda, J.; Linsky, J.; Rugheimer, S.; Miguel, Y. (2019). "A Hot Ultraviolet Flare on the M Dwarf Star GJ 674". arXiv:1901.08647 [astro-ph.SR].
- ^ 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. S2CID 119671420.
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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Categories:
- Gliese 674
- Ara (constellation)
- Hipparcos objects
- Durchmusterung objects
- Local Bubble
- M-type main-sequence stars
- Planetary systems with one confirmed planet
- Gliese and GJ objects
- Red dwarf star stubs