Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Aquarius |
Right ascension | 21h 42m 10.11292s [1] |
Declination | +01° 17′ 06.9019″ [1] |
Apparent magnitude (V) | 5.66 [2] |
Characteristics | |
Spectral type | K2(III) [3] |
B−V color index | 1.446±0.008 [2] |
Astrometry | |
Radial velocity (Rv) | +8.15±0.19 [2] km/s |
Proper motion (μ) |
RA: −4.298
[1]
mas/
yr Dec.: −7.530 [1] mas/ yr |
Parallax (π) | 3.4044 ± 0.1310 mas [1] |
Distance | 960 ± 40
ly (290 ± 10 pc) |
Absolute magnitude (MV) | −1.98 [2] |
Details | |
Radius | 54.5+3.5 −3.00 [1] R☉ |
Luminosity | 842±38 [1] L☉ |
Surface gravity (log g) | 1.2 [4] cgs |
Temperature | 4,210+121 −129 [1] K |
Rotational velocity (v sin i) | 3.2 [4] km/s |
Other designations | |
Database references | |
SIMBAD | data |
26 Aquarii is a single [6] star located approximately 960 [1] light years away from the Sun in the zodiac constellation of Aquarius. 26 Aquarii is the Flamsteed designation. [5] It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.66. [2] This object is moving away from the Earth with a heliocentric radial velocity of +8 km/s. [2]
Houk and Swift (1999) listed a stellar classification of K2(III) [3] for 26 Aquarii, corresponding to an evolved K-type giant of uncertain luminosity class. Bartkevicius and Lazauskaite (1997) found spectral traits of MD-Ba?-K3 II–III, K2 Ia, suggesting some type of giant K-type star with a suspected metal deficiency (MD) of barium. [7] It has 54.5 times the Sun's radius and is radiating 842 times the luminosity of the Sun from its photosphere at an effective temperature of 4,210 K. [1]