HD 28254

HD 28254 is a binary star system located 180 light-years away in the constellation Dorado. The primary component is an 8th magnitude G-type main-sequence star. This star is larger, cooler, brighter, and more massive than the Sun, and its metal content is 2.3 times as much as the Sun. In 2009, a gas giant exoplanet was found in orbit around the star.

HD 28254
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Dorado
Right ascension 04h 24m 50.705s
Declination −50° 37 19.88
Apparent magnitude (V) 7.69
Characteristics
Spectral type G1IV/V
Apparent magnitude (B) 8.412
Apparent magnitude (R) 7.70
Apparent magnitude (J) 6.395±0.026
Apparent magnitude (H) 6.133±0.031
Apparent magnitude (K) 6.006±0.029
B−V color index 0.722
V−R color index 0.01
Astrometry
Radial velocity (Rv)−9.315±0.002 km/s
Proper motion (μ) RA: −67.277 mas/yr
Dec.: −143.680 mas/yr
Parallax (π)18.1242 ± 0.0247 mas
Distance180.0 ± 0.2 ly
(55.17 ± 0.08 pc)
Absolute magnitude (MV)4.001
Details
Mass1.11±0.01 M
Radius1.57±0.02 R
Luminosity2.19±0.01 L
Surface gravity (log g)4.08±0.02 cgs
Temperature5,607±37 K
Metallicity [Fe/H]0.36±0.03 dex
Rotational velocity (v sin i)2.50±1.0 km/s
Age7.8±0.4 Gyr
Other designations
CD–50°1385, GC 5376, HD 28254, HIP 20606, SAO 233508, PPM 333464
Database references
SIMBADA
B
Exoplanet Archivedata
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