| Observation data Epoch J2000 Equinox J2000 |
|
|---|---|
| Constellation | Aquarius |
| Right ascension | 23h 17m 54.2152s |
| Declination | -09° 10′ 57.048″ |
| Apparent magnitude (V) | 4.4 |
| Characteristics | |
| Spectral type | B5V |
| U−B color index | -0.56 |
| B−V color index | -0.15 |
| Variable type | Eruptive variable |
| Astrometry | |
| Radial velocity (Rv) | -6 km/s |
| Proper motion (μ) | RA: 19.63 mas/yr Dec.: -9.64 mas/yr |
| Parallax (π) | 10.13 ± 1.04 mas |
| Distance | approx. 320 ly (approx. 100 pc) |
| Absolute magnitude (MV) | 4.24 |
| Details | |
| Mass | 18 M☉ |
| Radius | 7 R☉ |
| Luminosity | 20,000 L☉ |
| Temperature | 10,000–30,000 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
Psi-2 Aquarii is a blue-white B-type main sequence dwarf star with a mean apparent magnitude of +4.41. It is approximately 322 light years from Earth. It is a variable Be star and its brightness varies by 0.06 magnitudes in the blue end of the visible spectrum.
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