7 Aquarii
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Aquarius |
Right ascension | 20h 56m 54.0278s |
Declination | -09° 41′ 51.161″ |
Apparent magnitude (V) | 5.499 |
Characteristics | |
Spectral type | K5III |
U−B color index | 1.71 |
B−V color index | 1.47 |
Variable type | Variable star |
Astrometry | |
Radial velocity (Rv) | -32.7 km/s |
Proper motion (μ) | RA: -3.51 mas/yr Dec.: -11.53 mas/yr |
Parallax (π) | 5.42 ± 0.99 mas |
Distance | approx. 600 ly (approx. 180 pc) |
Absolute magnitude (MV) | 7.002 |
Orbit | |
Companion | 7 Aquarii B |
Semi-major axis (a) | 2.1" |
Inclination (i) | 165° |
Orbit | |
Companion | 7 Aquarii C |
Semi-major axis (a) | 176.5" |
Inclination (i) | 67° |
Other designations | |
ZI 1966, GC 29220, HR 8015, SAO 144968, GCRV 13152, IDS 20515-1004 A, BU 1034AB, IRAS 20541-0953, SRS 16468, ADS 14449 AB, GSC 05774-01594, IRC -10553, TYC 5774-1594-1, ADS 14449 A, HD 199345, 2MASS J20565402-0941511, YZ 99 7416, BD-10° 5553, HERZ 15809, CCDM J20570-0941AB, HIC 103401, NSV 13419, CSV 102046, HIP 103401, PPM 204646. | |
Database references | |
SIMBAD | data |
Database references | |
SIMBAD | data |
Data sources: | |
Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
7 Aquarii (abbreviated 7 Aqr) is a variable star in the constellation Aquarius. 7 Aquarii is the Flamsteed designation. Its apparent magnitude is 5.49.
Components
NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
---|---|---|---|---|---|
7 Aquarii B (BD-10 5554) | 20h 57m 05.0002s | -09° 40' 39.041 | 9.81 | M | Simbad |
References
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