| 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]
GaiaDR2 was invoked but never defined (see the help page).Anderson2012 was invoked but never defined (see the help page).Houk1999 was invoked but never defined (see the help page).Rebull2015 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).Eggleton2008 was invoked but never defined (see the help page).Bartkevicius1997 was invoked but never defined (see the help page).