| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 21h 09m 35.6477s |
| Declination | -11° 22′ 18.095″ |
| Apparent magnitude (V) | 4.519 |
| Characteristics | |
| Spectral type | G8III |
| U−B color index | 0.7 |
| B−V color index | 0.94 |
| Astrometry | |
| Radial velocity (Rv) | -11.8 km/s |
| Proper motion (μ) | RA: 92.31 mas/yr Dec.: -15.76 mas/yr |
| Parallax (π) | 19.93 ± 0.77 mas |
| Distance | 164 ± 6 ly (50 ± 2 pc) |
| Absolute magnitude (MV) | 5.752 |
| Details | |
| Mass | 1.1 M☉ |
| Radius | 1.1 R☉ |
| Luminosity | 1.2 L☉ |
| Temperature | 5,000–6,000 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Nu Aquarii (ν Aqr, ν Aquarii) is a star in the constellation Aquarius. It shares the traditional name Albulaan with μ Aquarii. The name derives from an Arabic term al-bulacān (ألبولعان) meaning "the two swallowers". This star, along with ε Aqr (Albali) and μ Aqr (Albulaan), were al Bulaʽ (البلع), the Swallower.[1][2][3]
In Chinese, 天壘城 (Tiān Lěi Chéng), meaning Celestial Ramparts, refers to an asterism consisting of ν Aquarii, ξ Aquarii, 46 Capricorni, 47 Capricorni, λ Capricorni, 50 Capricorni, 18 Aquarii, 29 Capricorni, 9 Aquarii, 8 Aquarii, 14 Aquarii, 17 Aquarii and 19 Aquarii.[4] Consequently, ν Aquarii itself is known as 天壘城十 (Tiān Lěi Chéng shí, English: the Tenth Star of Celestial Ramparts.)[5]
Nu Aquarii is a yellow G-type giant with an apparent magnitude of +4.50. It is approximately 164 light years from Earth.
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