Gliese 674

Not to be confused with Gliese 676.
Gliese 674
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
Distance14.81 ± 0.10 ly
(4.54 ± 0.03 pc)
Absolute magnitude (MV)11.06
Details
Mass0.35 M☉
Radius0.41-0.43 R☉
Luminosity0.016 L☉
Surface gravity (log g)570 m/s2 (58.1 g) cgs
Temperature3600 ± 100 K
Metallicity-0.28
Rotation32.9±0.1 d[2]
Age0.55 ± 0.45 Gyr
Other designations
GJ 674, CD -46°11540, GCTP 3958.00, LHS 449, LFT 1351, LTT 6942, LPM 645, HIP 85523.
Database references
SIMBADThe star
b
Exoplanet Archivedata
ARICNSdata
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]

The Gliese 674 planetary system
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. 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
  2. ↑ 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.
  3. ↑ 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.
  • "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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