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User:Kepler-1229b/sandbox/HD 5388 b

Coordinates: Sky map 00h 55m 11.8897s, −47° 24′ 21.475″
From Wikipedia, the free encyclopedia
HD 5388 b
Discovery
Discovered bySantos et al.
Discovery siteLa Silla Observatory
Discovery dateOctober 19, 2009
radial velocity (HARPS)
Orbital characteristics
Apastron2.46 AU (368,000,000 km)
Periastron1.06 AU (159,000,000 km)
1.76 AU (263,000,000 km)[1]
Eccentricity0.40 ± 0.02[1]
777 ± 4[1] d
2.13 y
24.7
2,454,570 ± 9[1]
324 ± 4[1]
Semi-amplitude41.7 ± 1.6[1]
StarHD 5388
Physical characteristics
Mass69[2] MJ

HD 5388 b (also known as HIP 4311 b) was thought to be an extrasolar planet orbiting the F-type main sequence star HD 5388, located approximately 175 light years away in the constellation Phoenix. It takes over two years to orbit the star at a semimajor axis of 1.76 AU with an eccentricity of 0.40.[1] It was announced on October 19, 2009, together with 29 other planets.

This planet has been disproved and shown to be a brown dwarf.[2]

See also

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References

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  1. ^ a b c d e f g Santos, N. C.; et al. (2010). "The HARPS search for southern extrasolar planets XXI. Three new giant planets orbiting the metal-poor stars HD5388, HD181720, and HD190984". Astronomy and Astrophysics. 512. A47. arXiv:0912.3216. Bibcode:2010A&A...512A..47S. doi:10.1051/0004-6361/200913489.
  2. ^ a b Sahlmann, J.; et al. (2011). "HD 5388 b is a 69 MJup companion instead of a planet". Astronomy and Astrophysics Letters. 528. L8. arXiv:1102.3372. Bibcode:2011A&A...528L...8S. doi:10.1051/0004-6361/201116533.

Category:Phoenix (constellation) Category:Brown dwarfs