Eta2 Hydri b
Discovery
Discovered bySetiawan et al.
Discovery siteChile, La Silla
Discovery date25 May 2005
Radial velocity
Orbital characteristics
1.93 AU (289,000,000 km)
Eccentricity0.40±0.07
711±8 d
2,451,420
351.5±9.5
Semi-amplitude105±8
StarEta2 Hydri
Physical characteristics
Mass>6.54 MJ

    Eta2 Hydri b2 Hyi b, η2 Hydri b), commonly known as HD 11977 b, is an extrasolar planet that is approximately 217 light-years away in the constellation of Hydrus. The presence of the planet around an intermediately massive giant star provides indirect evidence for the existence of planetary systems around A-type stars.

    References

    • Setiawan, J.; Rodmann, J.; Da Silva, L.; Hatzes, A. P.; Pasquini, L.; Von Der Lühe, O.; De Medeiros, J. R.; Döllinger, M. P.; Girardi, L. (2005). "A substellar companion around the intermediate-mass giant star HD 11977". Astronomy & Astrophysics. 437 (2): L31–L34. arXiv:astro-ph/0505510. Bibcode:2005A&A...437L..31S. doi:10.1051/0004-6361:200500133. S2CID 6362483.


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