HD 50554

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HD 50554
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Gemini
Right ascension 06h 54m 42.83s[1]
Declination +24° 14′ 44.0″[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 1.04 M
Radius 1.11 ± 0.33 R
Luminosity 1.33 L
Surface gravity (log g) 4.35 cgs
Temperature 5977 ± 5.8[2] K
Metallicity –0.07
Rotation 3.3 km/s
Age 4.58 years
Other designations
BD+24°1451, GC 9043, GSC 01894-01961, HIP 33212, SAO 78855
Database references
SIMBAD data
Extrasolar Planets
Encyclopaedia
data

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

Star[edit]

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[edit]

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[edit]

References[edit]

  1. ^ a b c d e van Leeuwen, F. (2007). "HIP 33212". Hipparcos, the New Reduction. 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. arXiv:astro-ph/0308429. Bibcode:2003A&A...411..559K. doi:10.1051/0004-6361:20031378. 
  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. 
  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. 
  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. 

External links[edit]


Coordinates: Sky map 06h 54m 42.8253s, +24° 14′ 44.011″