Gliese 433 is a dim red dwarf star in the constellation of Hydra, roughly 29.5 light years away from the Sun. Astronomers have announced the discovery of a very low-mass extrasolar planet in close orbit.
Gliese 433 b is an extrasolar planet which orbits the star. This planet is a super-Earth with at least six times the mass of Earth and takes approximately seven days to orbit the star at a semimajor axis of approximately 0.056 AU. This planet was announced in a press release in October 2009, but no discovery paper has yet been made available. A study described in a 2014 paper by Tuomi et al. confirms both detections.
(in order from star)
- Zechmeister, M.; Kürster, M.; Endl, M. (August 6, 2009). "The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs". Astronomy and Astrophysics. 505: 859–871. arXiv: . Bibcode:2009A&A...505..859Z. doi:10.1051/0004-6361/200912479.
- Suárez Mascareño, A.; et al. (September 2015), "Rotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators", Monthly Notices of the Royal Astronomical Society, 452 (3): 2745–2756, arXiv: , Bibcode:2015MNRAS.452.2745S, doi:10.1093/mnras/stv1441.
- "32 New Exoplanets Found". ESO News. ESO. Retrieved 15 February 2012.
- "Bayesian search for low-mass planets around nearby M dwarfs" (PDF). Mon. Not. R. Astron. Soc. 000, 1 – 31. RAS. Retrieved 18 February 2014.
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