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
Age 0.55 ± 0.45 G years
Other designations
GJ 674, CD -46°11540, GCTP 3958.00, LHS 449, LFT 1351, LTT 6942, LPM 645, HIP 85523.
Database references
SIMBAD data
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[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.[2]

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

Distance[edit]

Gliese 674 distance estimates

Source Parallax, mas Distance, pc Distance, ly Ref.
Woolley et al. (1970) 216 ± 8 4.63+0.18
−0.17
15.1+0.6
−0.5
[3]
Gliese & Jahreiß (1991) 219.7 ± 12.1 4.55+0.27
−0.24
14.8+0.9
−0.8
[4]
van Altena et al. (1995) 216.8 ± 7.1 4.61+0.16
−0.15
15 ± 0.5 [5]
Perryman et al. (1997) (Hipparcos) 220.43 ± 1.63 4.54 ± 0.03 14.8 ± 0.11 [6]
Perryman et al. (1997) (Tycho) (absents) [7]
van Leeuwen (2007) 220.24 ± 1.42 4.541 ± 0.029 14.81+0.1
−0.09
[1]
RECONS TOP100 (2012) 220.11 ± 1.39[note 1] 4.543 ± 0.029 14.82 ± 0.09 [8]

Non-trigonometric distance estimates are marked in italic. The best estimate is marked in bold.

See also[edit]

External links[edit]

References[edit]

  1. ^ a b c d e f 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. ^ 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. 
  3. ^ Woolley R.; Epps E. A.; Penston M. J.; Pocock S. B. (1970). "Woolley 674". Catalogue of stars within 25 parsecs of the Sun. Retrieved 2014-10-22. 
  4. ^ Gliese, W. and Jahreiß, H. (1991). "Gl 674". Preliminary Version of the Third Catalogue of Nearby Stars. Retrieved 2014-10-22. 
  5. ^ Van Altena W. F., Lee J. T., Hoffleit E. D. (1995). "GCTP 3958". The General Catalogue of Trigonometric Stellar Parallaxes, Fourth Edition. Retrieved 2014-10-22. 
  6. ^ Perryman et al. (1997). "HIP 85523". The Hipparcos and Tycho Catalogues. Retrieved 2014-10-22. 
  7. ^ Perryman et al. (1997). "HIP 85523". The Hipparcos and Tycho Catalogues. Retrieved 2014-10-22. 
  8. ^ "RECONS TOP100". THE ONE HUNDRED NEAREST STAR SYSTEMS brought to you by RECONS (Research Consortium On Nearby Stars). 2012. Retrieved 2014-10-22. 

Notes[edit]

  1. ^ Weighted parallax based on parallaxes from van Altena et al. (1995) and van Leeuwen (2007).

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