HD 50554
HD 50554 is a star approximately 98 light-years (30 pc) away in the constellation Gemini.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Gemini |
| Right ascension | 06h 54m 42.825s[1] |
| Declination | +24° 14′ 44.02″[1] |
| Apparent magnitude (V) | +6.860 |
| Characteristics | |
| Spectral type | F8V |
| B−V color index | 0.532 |
| Variable type | “None” |
| Astrometry | |
| Radial velocity (Rv) | −4.2 km/s |
| Proper motion (μ) | RA: −37.58 ± 0.71[1] mas/yr Dec.: −95.54 ± 0.47[1] mas/yr |
| Parallax (π) | 33.43 ± 0.59[1] mas |
| Distance | 98 ± 2 ly (29.9 ± 0.5 pc) |
| Absolute magnitude (MV) | +4.401 |
| Details | |
| Mass | 1.06 ± 0.03[2] M☉ |
| Radius | 1.07 ± 0.03[2] R☉ |
| Luminosity | 1.37 ± 0.01[2] L☉ |
| Surface gravity (log g) | 4.4 ± 0.04[2] cgs |
| Temperature | 6036 ± 52[2] K |
| Metallicity [Fe/H] | −0.07 dex |
| Rotational velocity (v sin i) | 3.3 km/s |
| Age | 3.3 ± 1.4[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
Star
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.
Planetary system
In 2001, a giant planet was announced by the European Southern Observatory, who used the radial velocity method.[3][4] The discovery was confirmed in 2002 using observations from the lick and keck telescopes.[5]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >4.46 ± 0.48 MJ | 2.28 ± 0.13 | 1224 ± 12 | 0.444 ± 0.038 | — | — |
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See also
- HD 50499
- List of extrasolar planets
References
- van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
- Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
- "Exoplanets: The Hunt Continues!" (Press release). Garching, Germany: European Southern Observatory. April 4, 2001. Retrieved December 27, 2012.
- Perrier, C.; et al. (2003). "The ELODIE survey for northern extra-solar planets. I. Six new extra-solar planet candidates". Astronomy and Astrophysics. 410 (3): 1039–1049. arXiv:astro-ph/0308281. Bibcode:2003A&A...410.1039P. doi:10.1051/0004-6361:20031340.
- Fischer, Debra A.; et al. (2002). "Planetary Companions to HD 136118, HD 50554, and HD 106252". Publications of the Astronomical Society of the Pacific. 114 (795): 529–535. Bibcode:2002PASP..114..529F. doi:10.1086/341677. JSTOR 10.1086/341677.
- Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701.
External links
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