Jean 317

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Star
gliese 317
AladinLite
Observation
dates equinox :  J2000.0 , epoch : J2000.0
Constellation Ship compass
Right ascension 08 h 40 m 59.21 s
declination -23 ° 27 ′ 22.6 ″
Apparent brightness 11.98 likes
Typing
Known exoplanets 2
B − V color index (1.23) 
R − I index (2.26) 
Spectral class M3.5 V
Astrometry
Radial velocity (87.73 ± 0.12) km / s
parallax (65.77 ± 0.06)  mas
distance (49.57 ± 0.05)  ly
(15.20 ± 0.01)  pc
Proper movement 
Rec. Share: (−461.16 ± 0.14)  mas / a
Dec. portion: (805.57 ± 0.13)  mas / a
Physical Properties
Dimensions (0.42 ± 0.05)  M ☉
Effective temperature (3510 ± 50)  K.
Metallicity [Fe / H] (0.4 ± 0.2)
Other names
and catalog entries
Gliese catalog FY 317 [1]
2MASS catalog 2MASS J08405923-2327232 [2]
Other names LHS 2037

Gliese 317 is a red dwarf that is orbited by at least two planets , Gliese 317 b and Gliese 317 c . The star has the spectral class M3.5 V. Its mass is around 0.42 solar masses . Its companions were both discovered in 2007 through measurements of its radial velocity .

Individual evidence

  1. ↑ a b c d e f g h L 675-81. In: SIMBAD . Center de Données astronomiques de Strasbourg , accessed on September 21, 2019 .
  2. ↑ a b c GJ 317 c. In: Extrasolar Planets Encyclopaedia . Retrieved September 21, 2019 .