7 Aquarii

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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
Details
Mass 0,8 M
Radius 0,9 R
Luminosity 0,4 L
Temperature 3,500–5,000 K
Metallicity ?
Rotation ?
Age ? years
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 is a variable star in the constellation Aquarius. Its apparent magnitude is 5.49.

Components[edit]

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[edit]