Gliese 758 B

From Wikipedia, the free encyclopedia
  (Redirected from GJ 758 B)
Jump to: navigation, search
GJ 758 B
Extrasolar planet List of extrasolar planets
GJ 758 System - Labeled.jpg
Discovery image of GJ 758 B, taken with Subaru HiCIAO in the near infrared.
Parent star
Star GJ 758
Constellation Lyra
Right ascension (α) 19h 23m 34.0s
Declination (δ) +33° 13′ 19.1″
Apparent magnitude (mV) 6.36
Distance 50.55 ly
(15.5 pc)
Spectral type G9V
Orbital elements
Semimajor axis (a) 41.8+37.3
[1] AU
Eccentricity (e) 0.464+0.206
Orbital period (P) 270+433
[1] y
Physical characteristics
Mass (m) ~30–40[1] MJ
Temperature (T) 593+44
Discovery information
Discovery date November 9, 2009
Discoverer(s) Thalmann, et al.
Discovery method Direct imaging
Discovery status Published
Database references
Extrasolar Planets
Exoplanet Archive data
Open Exoplanet Catalogue data

GJ 758 B is a brown dwarf orbiting the G-type main sequence star GJ 758, located approximately 50 light years away, in the constellation Lyra.

GJ 758 B was detected by direct imaging using the HiCIAO instrument of the Subaru Telescope.[2][3][4] The parameters have subsequently been revised in a follow-up study which also revealed that a putative second substellar object in the system was in fact an unrelated background star.[1]


  1. ^ a b c d e Janson, M.; Carson, J.; Thalmann, C.; McElwain, M. W.; Goto, M.; Crepp, J.; Wisniewski, J.; Abe, L.; Brandner, W.; Burrows, A.; Egner, S.; Feldt, M.; Grady, C. A.; Golota, T.; Guyon, O.; Hashimoto, J.; Hayano, Y.; Hayashi, M.; Hayashi, S.; Henning, T.; Hodapp, K. W.; Ishii, M.; Iye, M.; Kandori, R.; Knapp, G. R.; Kudo, T.; Kusakabe, N.; Kuzuhara, M.; Matsuo, T.; Mayama, S.; Miyama, S.; Morino, J.-I.; Moro-Martín, A.; Nishimura, T.; Pyo, T.-S.; Serabyn, E.; Suto, H.; Suzuki, R.; Takami, M.; Takato, N.; Terada, H.; Tofflemire, B.; Tomono, D.; Turner, E. L.; Watanabe, M.; Yamada, T.; Takami, H.; Usuda, T.; Tamura, M. (2011). "Near-infrared Multi-band Photometry of the Substellar Companion GJ 758 B". The Astrophysical Journal 728 (2). arXiv:1011.5505. Bibcode:2011ApJ...728...85J. doi:10.1088/0004-637X/728/2/85. 
  2. ^ Thalmann, Christian (2009). "Discovery of the Coldest Imaged Companion of a Sun-Like Star". arXiv:0911.1127v1 [astro-ph.EP]. 
  3. ^ "Possible Planet Around a G-class Star". Centauri Dreams. 2009-12-04. Retrieved 2009-12-04. 
  4. ^ "Discovery of an Exoplanet Candidate Orbiting a Sun-Like Star: Inaugural Observations with Subaru's New Instrument HiCIAO". Subaru Telescope. 2009-12-03. Retrieved 2009-12-04. 

External links[edit]

Coordinates: Sky map 19h 23m 34.0s, +33° 13′ 19.1″