| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquarius |
| 94 Aquarii A (Aa/Ab) | |
| Right ascension | 23h 19m 06.7257s[1] |
| Declination | –13° 27′ 31.6146″[1] |
| Apparent magnitude (V) | 5.19[2] |
| 94 Aquarii B | |
| Right ascension | 23h 19m 06.5609s[3] |
| Declination | –13° 27′ 18.9037″[3] |
| Apparent magnitude (V) | 7.52[2] |
| Characteristics | |
| 94 Aqr A | |
| Spectral type | G8.5 IV[4] + K V[5] |
| U−B color index | +0.42[2] |
| B−V color index | +0.79[2] |
| 94 Aqr B | |
| Spectral type | K2 V[4] |
| U−B color index | +0.60[2] |
| B−V color index | +0.88[2] |
| Astrometry | |
| 94 Aquarii A (Aa/Ab) | |
| Radial velocity (Rv) | +17.60±0.07[6] km/s |
| Proper motion (μ) | RA: 258.738±0.944[1] mas/yr Dec.: −73.014±0.928[1] mas/yr |
| Parallax (π) | 44.8996 ± 0.5572 mas[1] |
| Distance | 72.6 ± 0.9 ly (22.3 ± 0.3 pc) |
| Absolute magnitude (MV) | +3.52/+6.52[7] |
| 94 Aquarii B | |
| Proper motion (μ) | RA: 306.702±0.107[3] mas/yr Dec.: −104.633±0.086[3] mas/yr |
| Parallax (π) | 44.5152 ± 0.0550 mas[3] |
| Distance | 73.27 ± 0.09 ly (22.46 ± 0.03 pc) |
| Absolute magnitude (MV) | +5.92[7] |
| Orbit[7] | |
| 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[8] M☉ |
| Radius | 2.06±0.03[8] R☉ |
| Luminosity | 3.30±0.06[8] L☉ |
| Surface gravity (log g) | 3.88[9] cgs |
| Temperature | 5,461[9] K |
| Metallicity [Fe/H] | +0.23[9] dex |
| Rotational velocity (v sin i) | 8[10] km/s |
| Age | 6.2±0.2[8] Gyr |
| 94 Aquarii Ab | |
| Mass | 0.81±0.04[8] M☉ |
| Radius | 0.85±0.03[8] R☉ |
| Temperature | 4,670 or 4,970[5] K |
| 94 Aquarii B | |
| Surface gravity (log g) | 4.54[5] cgs |
| Temperature | 5,136[5] K |
| Metallicity [Fe/H] | +0.24[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
94 Aquarii (abbreviated 94 Aqr) is a triple star[12] system in the equatorial constellation of Aquarius. 94 Aquarii is the Flamsteed designation. The brightest member has an apparent visual magnitude of 5.19,[2] 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.[1]
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,[7] and a combined visual magnitude of 5.19.[13] The primary component of this pair has a stellar classification of G8.5 IV,[9] 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[13] K-type main sequence star with a classification of K2 V.[4]
Gaia DR2 for A was invoked but never defined (see the help page).aass34_1 was invoked but never defined (see the help page).Gaia DR2 for B was invoked but never defined (see the help page).mnras389_2_869 was invoked but never defined (see the help page).Katoh2013 was invoked but never defined (see the help page).Docobo2018 was invoked but never defined (see the help page).aj132_1_161 was invoked but never defined (see the help page).coapa239_1 was invoked but never defined (see the help page).SIMBAD was invoked but never defined (see the help page).apj135_301 was invoked but never defined (see the help page).aaa474_2_653 was invoked but never defined (see the help page).