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.) |
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]