94 Aquarii
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| 94 Aquarii A (Aa/Ab) | |
| Right ascension | 23h 19m 06.7257s |
| Declination | −13° 27′ 31.6146″ |
| Apparent magnitude (V) | 5.19 |
| 94 Aquarii B | |
| Right ascension | 23h 19m 06.5609s |
| Declination | –13° 27′ 18.9037″ |
| Apparent magnitude (V) | 7.52 |
| Characteristics | |
| 94 Aqr A | |
| Spectral type | G8.5 IV + K V |
| U−B color index | +0.42 |
| B−V color index | +0.79 |
| 94 Aqr B | |
| Spectral type | K2 V |
| U−B color index | +0.60 |
| B−V color index | +0.88 |
| Astrometry | |
| 94 Aquarii A (Aa/Ab) | |
| Radial velocity (Rv) | +17.60±0.07 km/s |
| Proper motion (μ) | RA: 258.738±0.944 mas/yr Dec.: −73.014±0.928 mas/yr |
| Parallax (π) | 44.8996±0.5572 mas |
| Distance | 72.6 ± 0.9 ly (22.3 ± 0.3 pc) |
| Absolute magnitude (MV) | +3.52/+6.52 |
| 94 Aquarii B | |
| Proper motion (μ) | RA: 306.702±0.107 mas/yr Dec.: −104.633±0.086 mas/yr |
| Parallax (π) | 44.5152 ± 0.0550 mas |
| Distance | 73.27 ± 0.09 ly (22.46 ± 0.03 pc) |
| Absolute magnitude (MV) | +5.92 |
| Orbit | |
| Primary | 94 Aquarii Aa |
| Companion | 94 Aquarii Ab |
| Period (P) | 6.321±0.010 yr |
| Semi-major axis (a) | 0.189±0.002″ |
| Eccentricity (e) | 0.173±0.020 |
| Inclination (i) | 44.5±1.0° |
| Longitude of the node (Ω) | 341.9±1.5° |
| Periastron epoch (T) | 2012.301 |
| Argument of periastron (ω) (secondary) | 28.3° |
| Details | |
| 94 Aquarii Aa | |
| Mass | 1.22±0.03 M☉ |
| Radius | 2.06±0.03 R☉ |
| Luminosity | 3.30±0.06 L☉ |
| Surface gravity (log g) | 3.88 cgs |
| Temperature | 5,461 K |
| Metallicity [Fe/H] | +0.23 dex |
| Rotational velocity (v sin i) | 8 km/s |
| Age | 6.2±0.2 Gyr |
| 94 Aquarii Ab | |
| Mass | 0.81±0.04 M☉ |
| Radius | 0.85±0.03 R☉ |
| Temperature | 4,670 or 4,970 K |
| 94 Aquarii B | |
| Surface gravity (log g) | 4.54 cgs |
| Temperature | 5,136 K |
| Metallicity [Fe/H] | +0.24 dex |
| Other designations | |
| BD−14 6448, GJ 894.2, HD 219834, HIP 115126, HR 8866, SAO 165625 | |
| Database references | |
| SIMBAD | data |
94 Aquarii (abbreviated 94 Aqr) is a triple star system in the equatorial constellation of Aquarius. 94 Aquarii is the Flamsteed designation. The brightest member has an apparent visual magnitude of 5.19, making it visible to the naked eye. The parallax measured by the Gaia spacecraft yields a distance estimate of around 73 light-years (22 parsecs) from Earth.
The inner pair of this triple star system form a spectroscopic binary with an orbital period of 6.321 years, a moderate orbital eccentricity of 0.173, and a combined visual magnitude of 5.19. The primary component of this pair has a stellar classification of G8.5 IV, with the luminosity class of IV indicating this is a subgiant star. At an angular separation of 13.0 arcseconds from this pair is a magnitude 7.52 K-type main sequence star with a classification of K2 V.