Hellenica World

HD 50554

HD 50554 is a star approximately 98 light-years (30 pc) away in the constellation Gemini.


HD 50554 is a yellow-white main-sequence star [F8V] that currently fuse hydrogen in its core. Since the star is 7th magnitude, it is not visible to the unaided eye, but with binoculars or a telescope, it should be easy to see this star. The age of the star is only 10 million years older than our Sun. It is a population I star with metallicity of –0.07 dex [Fe/H] or 85% as much metals as the Sun.
[edit] Planetary system

In 2002, a giant planet was found by Debra Fischer, who used the radial velocity method.[3] This superjovian planet orbits at 341 gigameters from the star in an eccentric orbit.

The HD 50554 system[4]
(in order from star)
Mass Semimajor axis
Orbital period
b >4.46 ± 0.48 MJ 2.28 ± 0.13 1224 ± 12 0.444 ± 0.038

See also

* HD 50499
* List of extrasolar planets


1. ^ a b c d e van Leeuwen, F. (2007). "HIP 33212". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=33120. Retrieved 2009-12-17.
2. ^ Kovtyukh et al.; Soubiran, C.; Belik, S. I.; Gorlova, N. I. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics 411 (3): 559–564. doi:10.1051/0004-6361:20031378. http://www.aanda.org/articles/aa/full/2003/46/aa3944/aa3944.html.
3. ^ Fischer et al.; Marcy, Geoffrey W.; Butler, R. Paul; Vogt, Steven S.; Walp, Bernie; Apps, Kevin (2002). "Planetary Companions to HD 136118, HD 50554, and HD 106252". Publications of the Astronomical Society of the Pacific 114: 529–535. doi:10.1086/341677. http://www.journals.uchicago.edu/doi/full/10.1086/341677.
4. ^ Butler et al.; Wright, J. T.; Marcy, G. W.; Fischer, D. A.; Vogt, S. S.; Tinney, C. G.; Jones, H. R. A.; Carter, B. D. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. doi:10.1086/504701. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html.

External links

* "HD 50554". Extrasolar Visions. http://www.extrasolar.net/startour.asp?StarCatID=normal&StarID=135.

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