HD 50554

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

HD 50554
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
Distance98 ± 2 ly
(29.9 ± 0.5 pc)
Absolute magnitude (MV)+4.401
Details
Mass1.06 ± 0.03[2] M
Radius1.07 ± 0.03[2] R
Luminosity1.37 ± 0.01[2] L
Surface gravity (log g)4.4 ± 0.04[2] cgs
Temperature6036 ± 52[2] K
Metallicity [Fe/H]−0.07 dex
Rotational velocity (v sin i)3.3 km/s
Age3.3 ± 1.4[2] Gyr
Other designations
BD+24°1451, GC 9043, GSC 01894-01961, HIP 33212, SAO 78855
Database references
SIMBADdata
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]

The HD 50554 planetary system[6]
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

See also

References

  1. 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. S2CID 18759600. Vizier catalog entry
  2. 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. S2CID 54555839.
  3. "Exoplanets: The Hunt Continues!" (Press release). Garching, Germany: European Southern Observatory. April 4, 2001. Retrieved December 27, 2012.
  4. 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. S2CID 6946291.
  5. 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.
  6. 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. S2CID 119067572.

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