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Double star system in the constellation Aquarius From Wikipedia, the free encyclopedia
HD 208177 is a double star system in the equatorial constellation of Aquarius.[5] They are faintly visible to the naked eye with an apparent magnitude of 6.20.[2] The pair have an angular separation of 19.113″.[7] The primary component is an evolved subgiant star with a stellar classification of F5IV.[3] It has an estimated 163%[5] of the Sun's mass and is about 1.7 billion years old[6]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 21h 54m 35.91630s[1] |
Declination | −03° 18′ 04.5532″[1] |
Apparent magnitude (V) | 6.20[2] |
Characteristics | |
Spectral type | F5IV[3] |
U−B color index | 0.07[2] |
B−V color index | 0.48[2] |
Astrometry | |
Radial velocity (Rv) | -20[4] km/s |
Proper motion (μ) | RA: +29.06[1] mas/yr Dec.: −29.87[1] mas/yr |
Parallax (π) | 16.89 ± 1.32 mas[1] |
Distance | 190 ± 20 ly (59 ± 5 pc) |
Details | |
Mass | 1.63[5] M☉ |
Surface gravity (log g) | 3.94[6] cgs |
Temperature | 6,577[6] K |
Metallicity [Fe/H] | 0.30[6] dex |
Age | 1.70[6] Gyr |
Mass | 0.32[5] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
Database references | |
SIMBAD | data |
Data sources: | |
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
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