Gliese 674

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Gliese 674
Observation data Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17^h 28^m 39.9463^s
Declination	–46° 53′ 42.685″
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 (R_v)	-10.5 ± 1.3 km/s
Proper motion (μ)	RA: 573.32 ± 1.89 mas/yr Dec.: -879.84 ± 0.82 mas/yr
Parallax (π)	220.25 ± 1.59 mas
Distance	14.8 ± 0.1 ly (4.54 ± 0.03 pc)
Absolute magnitude (M_V)	11.06

Details

Mass	0.35 M_☉
Radius	0.41-0.43 R_☉
Luminosity	0.0032 L_☉
Surface gravity (log g)	570 m/s² (58.1 g)
Temperature	3600 ± 100 K
Metallicity	-0.28
Age	0.55 ± 0.45 G years

Other designations
GJ 674, CD -46°11540, CP(D) −46°8664, GCTP 3958.00, LHS 449, LFT 1351, LTT 6942, LPM 645, HIP 85523.
Database references
SIMBAD	data
ARICNS	data

Gliese 674 (Gliese–Jahreiß 674) is a pre-main sequence red dwarf star approximately 15 light years away in the southern constellation of Ara.

1 Planetary system
2 See also
3 External links
4 References

[edit] 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.

The Gliese 674 system
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity
b	≥11.8 M_⊕	0.039	4.6938 ± 0.007	0.2 ± 0.02

[edit] See also

[edit] External links

"Gliese 674". nStars database entry. http://nstars.arc.nasa.gov/searches/starinfo.cfm?partb=1728m4653&starpage=0.
"Gliese 674". SolStation. http://www.solstation.com/stars/gl674.htm.
"Notes for star GJ 674". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/star.php?st=GJ+674.

[edit] References

← Star systems within 10–15 light-years →

Star systems (including brown dwarf systems) within 10–15 light-years from Earth.

F V (Yellow-white)	Procyon (11.44 ± 0.02 ly; 2 stars)

G V (Yellow)	Tau Ceti (11.905 ± 0.007 ly; 1 star)

K V (Orange)	Epsilon Eridani (10.480 ± 0.003 ly; 1 star, 2 planets: planet b • planet c) • 61 Cygni (11.40 ± 0.02 ly; 2 stars) • Epsilon Indi (11.81 ± 0.01 ly; 1 star, 2 brown dwarfs)

M V
(Red dwarf)

Ross 248 (10.31 ± 0.02 ly; 1 star) • Lacaille 9352 (10.69 ± 0.02 ly; 1 star) • Ross 128 (10.94 ± 0.05 ly; 1 star) • EZ Aquarii (11.27 ± 0.17 ly; 3 stars) • Struve 2398 (11.49 ± 0.06 ly; 2 stars) • Groombridge 34 (11.65 ± 0.03 ly; 2 stars) • DX Cancri (11.83 ± 0.13 ly; 1 star) • Gliese 1061 (11.99 ± 0.06 ly; 1 star) • YZ Ceti (12.12 ± 0.14 ly; 1 star) • Luyten's Star (12.25 ± 0.03 ly; 1 star) • SCR 1845-6357 (12.57 ± 0.05 ly; 1 star, 1 brown dwarf) • Teegarden's star (12.57 ± 0.04 ly; 1 star) • Kapteyn's Star (12.76 ± 0.05 ly; 1 star) • Lacaille 8760 (12.87 ± 0.04 ly; 1 star) • Kruger 60 (13.15 ± 0.07 ly; 2 stars) • Ross 614 (13.34 ± 0.05 ly; 2 stars) • Wolf 1061 (13.92 ± 0.09 ly; 1 star) • Gliese 1 (14.16 ± 0.06 ly; 1 star) • Wolf 424 (14.31 ± 0.29 ly; 2 stars: Wolf 424 A • Wolf 424 B) • TZ Arietis (14.51 ± 0.19 ly; 1 star) • Gliese 687 (14.79 ± 0.06 ly; 1 star) • LHS 292 (14.81 ± 0.25 ly; 1 star)‡ • Gliese 1245 (14.81 ± 0.07 ly; 3 stars) • Gliese 674 (14.82 ± 0.09 ly; 1 star, 1 planet: planet b)

White
Dwarf

DZ	van Maanen's star (14.02 ± 0.11 ly; 1 star)

Brown
Dwarf

M	DEN 1048-3956 (13.12 ± 0.06 ly; 1 brown dwarf)

T	UGPS 0722-05 (13.3 ± 2.0 ly; 1 brown dwarf)‡ • WISE 1741+2553 (17.9+3.3 −3.1 ly; 1 brown dwarf)‡

Y	WISE 1541-2250 (9.3+4.1 −2.2 ly; 1 brown dwarf)‡ • WISE 2056+1459 (9.8+11.1 −2.0 ly; 1 brown dwarf)‡ • WISE 1738+2732 (11.1+12.7 −0 ly; 1 brown dwarf)‡ • WISE 1405+5534 (~12.4 ly; 1 brown dwarf)‡ • WISE 0410+1502 (23.2+5.2 −12.7 ly; 1 brown dwarf)‡

In left column are stellar classes of primary members of star systems. ‡Distance error margin extends out of declared distance interval. Bold are systems containing at least one component with absolute magnitude of +8.5 or brighter. Italic are systems possibly located within declared distance interval, but probably not.

v t e Stars of Ara

Bayer	α (Choo) β γ δ ε¹ ε² ζ η θ ι κ λ μ ν¹ ν² π ρ¹ ρ² σ

Gould	1 G. 2 G. 3 G. 4 G. 5 G. 6 G. 7 G. 8 G. 9 G. 10 G. 11 G. 12 G. 13 G. (η) 14 G. 15 G. 16 G. 17 G. 18 G. 19 G. 20 G. 21 G. (ρ¹) 22 G. 23 G. (ζ) 24 G. (ρ²) 25 G. (ε¹) 26 G. 27 G. 28 G. 29 G. 30 G. 31 G. (ε²) 32 G. 33 G. 34 G. 35 G. 36 G. 37 G. 38 G. 39 G. 40 G. 41 G. 42 G. 43 G. 44 G. 45 G. 46 G. 47 G. 48 G. 49 G. (ι) 50 G. (γ) 51 G. (β) 52 G. 53 G. (κ) 54 G. 55 G. 56 G. 57 G. 58 G. 59 G. 60 G. (δ) 61 G. 62 G. (α, Choo) 63 G. 64 G. 65 G. 66 G. 67 G. (σ) 68 G. 69 G. (π) 70 G. 71 G. (λ) 72 G. 73 G. 74 G. 75 G. (μ) 76 G. 77 G. (ν¹) 78 G. (ν²) 79 G. 80 G. 81 G. 82 G. 83 G. 84 G. (θ) 85

Nearby	Gliese 674 Gliese 682 41 G.

List