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.
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 |
Distance | 180.0 ± 0.2 ly (55.17 ± 0.08 pc) |
Absolute magnitude (MV) | 4.001 |
Details | |
Mass | 1.11±0.01 M☉ |
Radius | 1.57±0.02 R☉ |
Luminosity | 2.19±0.01 L☉ |
Surface gravity (log g) | 4.08±0.02 cgs |
Temperature | 5,607±37 K |
Metallicity [Fe/H] | 0.36±0.03 dex |
Rotational velocity (v sin i) | 2.50±1.0 km/s |
Age | 7.8±0.4 Gyr |
Other designations | |
Database references | |
SIMBAD | A |
B | |
Exoplanet Archive | data |
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