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]