Gliese 674

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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
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 gcgs
Temperature 3600 ± 100 K
Metallicity -0.28
Rotation 32.9±0.1 d[2]
Age 0.55 ± 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
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.

Planetary system[edit]

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[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752free to read. 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:1506.08039free to read, 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:0704.0270free to read. Bibcode:2007A&A...474..293B. doi:10.1051/0004-6361:20077068. 

External links[edit]

Notes[edit]

Coordinates: Sky map 17h 28m 39.9463s, −46° 53′ 42.685″