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{{DISPLAYTITLE:Eta2 Hydri b}}{{Infobox planet
| name = Eta2 Hydri b
| discoverer = Setiawan et al.
| discovery_site = {{flagicon|Chile}} La Silla
| discovered = 25 May 2005
| discovery_method = Radial velocity
| apsis = astron
| semimajor = {{convert|1.93|AU|km|abbr=on}}
| eccentricity = 0.40±0.07
| period = 711±8 d
| time_periastron = 2,451,420
| arg_peri = 351.5±9.5
| semi-amplitude = 105±8
| star = Eta2 Hydri
| mass = >6.54 {{Jupiter mass|link=y}}
}}Eta2 Hydri b (η2 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- {{cite journal | url=http://www.aanda.org/articles/aa/full/2005/26/aahb021/aahb021.html | last =Setiawan | first=J. | title=A substellar companion around the intermediate-mass giant star HD 11977 | journal=Astronomy & Astrophysics | year=2005 | volume=437 | issue=2 | pages=L31–L34 | doi=10.1051/0004-6361:200500133 | last2=Rodmann | first2=J. | last3=Da Silva | first3=L. | last4=Hatzes | first4=A. P. | last5=Pasquini | first5=L. | last6=Von Der Lühe | first6=O. | last7=De Medeiros | first7=J. R. | last8=Döllinger | first8=M. P. | last9=Girardi | first9=L. | bibcode=2005A&A...437L..31S|arxiv = astro-ph/0505510 }}
External links- {{cite web|url=http://www.mpia.de/homes/setiawan/hd11977_english.html |title=HD 11977 B, a planet around a giant star |accessdate=2008-07-03 |work=Max-Planck-Institut für Astronomie |publisher= |date= |deadurl=yes |archiveurl=https://web.archive.org/web/20070314061322/http://www.mpia.de/homes/setiawan/hd11977_english.html |archivedate=March 14, 2007 }}
- {{cite web |url=http://exoplanet.eu/planet.php?p1=HD+11977&p2=b |title=Notes for planet HD 11977 b |accessdate=2008-07-03 |work=The Extrasolar Planets Encyclopaedia |publisher= |date= }}
{{-}}{{Sky|01|54|56|-|67|38|50|216.89}}{{extrasolar-planet-stub}}Eta2 Hydri b 5 : Exoplanets|Hydrus (constellation)|Giant planets|Exoplanets discovered in 2005|Exoplanets detected by radial velocity |