674
Star gliese 674 |
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AladinLite | |||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | altar | ||||||||||||
Right ascension | 17 h 28 m 39.95 s | ||||||||||||
declination | -46 ° 53 ′ 42.7 ″ | ||||||||||||
Apparent brightness | 9.38 likes | ||||||||||||
Typing | |||||||||||||
Known exoplanets | 1 | ||||||||||||
B − V color index | +1.57 | ||||||||||||
U − B color index | +1.20 | ||||||||||||
R − I index | +1.33 | ||||||||||||
Spectral class | M3 V | ||||||||||||
Variable star type | BY | ||||||||||||
Astrometry | |||||||||||||
parallax | (219.80 ± 0.05) mas | ||||||||||||
distance | (14.83 ± 0.01) Lj (4.550 ± 0.001) pc |
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Visual absolute brightness M vis | +11.09 mag | ||||||||||||
Proper movement | |||||||||||||
Rec. Share: | (+572.58 ± 0.10) mas / a | ||||||||||||
Dec. portion: | (−880.25 ± 0.07) mas / a | ||||||||||||
Physical Properties | |||||||||||||
Dimensions | (0.360 ± 0.007) M ☉ | ||||||||||||
radius | (0.365 ± 0.011) R ☉ | ||||||||||||
Luminosity |
0.016 L ☉ |
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Effective temperature | 3600 ± 100K | ||||||||||||
Metallicity [Fe / H] | −0.28 | ||||||||||||
Age | 550 ± 450 mill. A | ||||||||||||
Other names and catalog entries |
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Gliese 674 is a red dwarf in the constellation Altar, 14.8 light years from Earth . It has an apparent magnitude of 9.38 mag. In 2007, Xavier Bonfils discovered an exoplanet orbiting this star. This is called Gliese 674 b .
Individual evidence
- ↑ a b c d e f g CD-46 11540. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on November 10, 2018 .
- ^ Hipparcos catalog (ESA 1997)
- ↑ NSI 22,079th In: VSX. AAVSO , accessed November 10, 2018 .
- ↑ a b P. E. Kervella, F. Arenou, F. Mignard, F. Thévenin: Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly . In: Astronomy & Astrophysics . 623, p. A72. arxiv : 1811.08902 . bibcode : 2019A & A ... 623A..72K . doi : 10.1051 / 0004-6361 / 201834371 .
- ^ GJ 674. In: NASA Exoplanet Archive . Retrieved November 10, 2018 .
- ↑ a b c GJ 674b. In: Extrasolar Planets Encyclopaedia . Retrieved November 10, 2018 .