12 Aquarii

12 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 04m 04.74s
Declination -05° 49 23.08
Apparent magnitude (V) 5.89
Characteristics
Spectral type G4III
U−B color index 0.41
B−V color index 0.68
Astrometry
Radial velocity (Rv)1.1 km/s
Proper motion (μ) RA: 22.4 mas/yr
Dec.: 4.0 mas/yr
Parallax (π)6.03 ± 1.17 mas
Distanceapprox. 500 ly
(approx. 170 pc)
Absolute magnitude (MV)7.4
Details
Mass1.1 M
Radius1.1 R
Luminosity1.2 L
Temperature5,000–6,000 K
Metallicity?
Rotation?
Age? years
Orbit
Companion12 Aquarii B
Semi-major axis (a)0.1"
Orbit
Companion12 Aquarii C
Semi-major axis (a)2.4"
Inclination (i)195°
Other designations
HD 200497, ADS 14592 A, GC 29417, PPM 204770, BD-06° 5664A, GCRV 13234, SAO 145065, MCA 66Aa, CCDM J21041-0549A, HR 8059, STF 2745A, CSI-06 5664 2, IDS 20588-0613 A, WDS J21041-0549A.
Database references
SIMBADdata
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

12 Aquarii (abbreviated 12 Aqr) is a double star in the constellation Aquarius. 12 Aquarii is the Flamsteed designation. It is a yellow sub-giant that is slightly larger and heavier than the Sun with an apparent magnitude of 5.53 and absolute magnitude 7.4, making it less bright than the Sun comparatively.

Components

NAME Right ascension Declination Apparent magnitude (V) Spectral type Database references
12 Aquarii B (CSI-06 5664 1) 21h 04m 04.58s -05° 49' 24.2 7.31 A3V Simbad
12 Aquarii C (CSI-06 5664 3) 21h 04m 04.7247s -05° 49' 23.038 5.53 G4 Simbad

References


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