Gliese 758 B

Gliese 758 B (often shortened to GJ 758 B) is a brown dwarf or Super-Jupiter orbiting the G-type main sequence star Gliese 758, located approximately 50 light years away, in the constellation Lyra.

Gliese 758 B

Discovery image of Gliese 758 B, taken with Subaru HiCIAO in the near infrared.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Lyra
Right ascension 19h 23m 34.01358s[1]
Declination +33° 13′ 19.0725″[1]
Characteristics
Spectral type T8[2]
Details
Temperature600±100[2] K
Mass23+17
−13[2] MJup
Position (relative to Gliese 758)
ComponentGliese 758 B
Observed separation
(projected)		21.1+2.7
−1.3 AU
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

Gliese 758 B was detected by direct imaging using the HiCIAO instrument of the Subaru Telescope.[3][4][5] 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.[6]

Orbit

Gliese 758 B orbits its host star in an eccentric orbit with a semimajor axis of 21.1+2.7
−1.3 Astronomical units and an orbital period of 96+21
−9 years, which takes it within 9 astronomical units at its closest approach.[7]

References
  1. van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. Vigan, A.; Bonnefoy, M.; Ginski, C.; Beust, H.; Galicher, R.; Janson, M.; Baudino, J.-L.; Buenzli, E.; Hagelberg, J.; D’Orazi, V.; Desidera, S.; Maire, A.-L.; Gratton, R.; Sauvage, J.-F.; Chauvin, G.; Thalmann, C.; Malo, L.; Salter, G.; Zurlo, A.; Antichi, J.; Baruffolo, A.; Baudoz, P.; Blanchard, P.; Boccaletti, A.; Beuzit, J.-L.; Carle, M.; Claudi, R.; Costille, A.; Delboulbé, A.; Dohlen, K.; Dominik, C.; Feldt, M.; Fusco, T.; Gluck, L.; Girard, J.; Giro, E.; Gry, C.; Henning, T.; Hubin, N.; Hugot, E.; Jaquet, M.; Kasper, M.; Lagrange, A.-M.; Langlois, M.; Le Mignant, D.; Llored, M.; Madec, F.; Martinez, P.; Mawet, D.; Mesa, D.; Milli, J.; Mouillet, D.; Moulin, T.; Moutou, C.; Origné, A.; Pavlov, A.; Perret, D.; Petit, C.; Pragt, J.; Puget, P.; Rabou, P.; Rochat, S.; Roelfsema, R.; Salasnich, B.; Schmid, H.-M.; Sevin, A.; Siebenmorgen, R.; Smette, A.; Stadler, E.; Suarez, M.; Turatto, M.; Udry, S.; Vakili, F.; Wahhaj, Z.; Weber, L.; Wildi, F. (16 February 2016). "First light of the VLT planet finder SPHERE". Astronomy & Astrophysics. 587: A55. arXiv:1511.04076. Bibcode:2016A&A...587A..55V. doi:10.1051/0004-6361/201526465.
  3. Thalmann, Christian (2009). "Discovery of the Coldest Imaged Companion of a Sun-Like Star". The Astrophysical Journal. 707 (2): L123–L127. arXiv:0911.1127v1. Bibcode:2009ApJ...707L.123T. doi:10.1088/0004-637X/707/2/L123.
  4. "Possible Planet Around a G-class Star". Centauri Dreams. 2009-12-04. Retrieved 2009-12-04.
  5. "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.
  6. 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.; et al. (2011). "Near-infrared Multi-band Photometry of the Substellar Companion GJ 758 B". The Astrophysical Journal. 728 (2): 85. arXiv:1011.5505. Bibcode:2011ApJ...728...85J. doi:10.1088/0004-637X/728/2/85.
  7. Bowler, Brendan P.; et al. (2018). "Orbit and Dynamical Mass of the Late-T Dwarf Gl 758 B". The Astronomical Journal. 155 (4): 159. arXiv:1802.10126. Bibcode:2018AJ....155..159B. doi:10.3847/1538-3881/aab2a6.


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