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
Age0.55 ± 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
SIMBADdata
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.[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

Gliese 674 distance estimates

Source Parallax, mas Distance, pc Distance, ly Distance, Pm Ref.
Woolley et al. (1970) 216±8 4.63+0.18
−0.17		 15.1+0.6
−0.5		 142.9+5.5
−5.1		 [3]
Gliese & Jahreiß (1991) 219.7±12.1 4.55+0.27
−0.24		 14.8+0.9
−0.8		 140.4+8.2
−7.3		 [4]
van Altena et al. (1995) 216.8±7.1 4.61+0.16
−0.15		 15±0.5 142.3+4.8
−4.5		 [5]
Perryman et al. (1997) (Hipparcos) 220.43±1.63 4.54±0.03 14.8±0.11 140±1 [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		 140.1±0.9 [1]
RECONS TOP100 (2012) 220.11±1.39[note 1] 4.543±0.029 14.82±0.09 140.2±0.9 [8]

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

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 van Leeuwen F. (2007). "HIP 85523". Validation of the new Hipparcos reduction. Retrieved 2014-10-22.
  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 ed.). 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.

External links

Notes

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

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