GJ 758 B

GJ 758 B
Extrasolar planet List of extrasolar planets

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
−13.4[1] AU
Eccentricity (e) 0.464+0.206
−0.260[1]
Orbital period (P) 270+433
−119[1] y
Physical characteristics
Mass (m) ~30–40[1] MJ
Temperature (T) 593+44
−44 K
Discovery information
Discovery date November 9, 2009
Discoverer(s) Thalmann, et. al.
Detection method Direct imaging
Discovery status Published
Database references
Extrasolar Planets
Encyclopaedia		 data
SIMBAD 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]

References

  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. http://www.centauri-dreams.org/?p=10517. 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. http://subarutelescope.org/Pressrelease/2009/12/03/index.html. Retrieved 2009-12-04. 

External links

Animation of GJ 758 B's orbit compared to outer Solar System

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

GJ 758 system
Stars
Brown dwarf
GJ 758 B