HD 4203

HD 4203
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Pisces
Right ascension 00h 44m 41.20s[1]
Declination +20° 26′ 56.1″[1]
Apparent magnitude (V) 8.68
Characteristics
Spectral type G5
Astrometry
Proper motion (μ) RA: 122.97 ± 0.84[1] mas/yr
Dec.: -124.29 ± 0.66[1] mas/yr
Parallax (π)12.95 ± 1.03[1] mas
Distance250 ± 20 ly
(77 ± 6 pc)
Details
Mass1.12 ± 0.03[2] M☉
Radius1.35 ± 0.03[2] R☉
Luminosity1.68 ± 0.01[2] L☉
Surface gravity (log g)4.22 ± 0.03[2] cgs
Temperature5666 ± 43[2] K
Age6.3 ± 1.0[2] Gyr
Other designations
BD+19º117, HIP 3502, SAO 74235
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

HD 4203 is a 9th magnitude star located approximately 250 light years away in the constellation Pisces. The star is yellow with spectral type G5. The star has evolved for 9.41 billion years. The star has a gas giant planet orbiting around a high metallicity star.[3]

The HD 4203 planetary system[4]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b >1.164 ± 0.067 MJ 2.07 ± 0.18 431.88 ± 0.85 0.519 ± 0.027 — —
c >2.17 ± 0.52 MJ — 6700 ± 4500 0.24 ± 0.13 — —

See also

Notes

  1. 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. Bibcode:2007A&A...474..653V. arXiv:0708.1752 Freely accessible. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  2. 1 2 3 4 5 6 Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. Bibcode:2015A&A...575A..18B. arXiv:1411.4302 Freely accessible. doi:10.1051/0004-6361/201424951.
  3. ↑ Vogt, Steven S.; et al. (2002). "Ten Low-Mass Companions from the Keck Precision Velocity Survey". The Astrophysical Journal. 568 (1): 352–362. Bibcode:2002ApJ...568..352V. arXiv:astro-ph/0110378 Freely accessible. doi:10.1086/338768.
  4. ↑ Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. Bibcode:2006ApJ...646..505B. arXiv:astro-ph/0607493 Freely accessible. doi:10.1086/504701.

Coordinates: 00h 44m 41.2021s, +20° 26′ 56.138″


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