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12 Aquarii

<tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Astrometry</th></tr></th></tr><tr><th colspan="2" style="text-align: center"></tr><tr style="vertical-align:top;"><td>Radial velocity (Rv)</td><td>1.1 km/s</td></tr><tr style="vertical-align:top;"><td>Proper motion (μ)</td><td> RA: 22.4 mas/yr
Dec.: 4.0 mas/yr </td></tr><tr style="vertical-align:top;"><td>Parallax (π)</td><td>6.03 ± 1.17 mas</td></tr><tr style="vertical-align:top;"><td>Distance</td><td>approx. 500 ly
(approx. 170 pc)</td></tr><tr style="vertical-align:top;"><td>Absolute magnitude (MV)</td><td>7.4</td></tr><tr><th colspan="2" style="text-align: center"></th></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Details</th></tr></th></tr><tr><th colspan="2" style="text-align: center"></th></tr><tr style="vertical-align:baseline;"><td>Mass</td><td>1.1 M</td></tr><tr style="vertical-align:baseline;"><td>Radius</td><td>1.1 R</td></tr><tr style="vertical-align:baseline;"><td>Luminosity</td><td>1.2 L</td></tr><tr style="vertical-align:baseline;"><td>Temperature</td><td>5,000–6,000 K</td></tr><tr style="vertical-align:baseline;"><td>Metallicity</td><td>?</td></tr><tr style="vertical-align:baseline;"><td>Rotation</td><td>?</td></tr><tr style="vertical-align:baseline;"><td>Age</td><td>? years</td></tr><tr><th colspan="2" style="text-align: center"></th></tr> <tr><td style="background-color: #FFFFC0;" colspan="2" align=center>Orbit</td></tr><tr style="vertical-align:baseline;"><td>Companion</td><td>12 Aquarii B</td></tr><tr style="vertical-align:baseline;"><td>Semi-major axis (a)</td><td>0.1"</td></tr> <tr><td style="background-color: #FFFFC0;" colspan="2" align=center>Orbit</td></tr><tr style="vertical-align:baseline;"><td>Companion</td><td>12 Aquarii C</td></tr><tr style="vertical-align:baseline;"><td>Semi-major axis (a)</td><td>2.4"</td></tr><tr style="vertical-align:baseline;"><td>Inclination (i)</td><td>195°</td></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Other designations</th></tr><tr><td colspan="2">
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.
</td></tr>

<tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Database references</th></tr><tr style="vertical-align: top;"><td>SIMBAD</td><td>data</tr>


12 Aquarii
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 04m 04.74s
Declination -05° 49′ 23.08″
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Characteristics
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Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.) </div>

12 Aquarii is a double star in the constellation Aquarius. Its apparent magnitude is 5.53 and absolute magnitude is 7.4, making it less bright than our sun comparatively. 12 Aquarii is a yellow sub-giant that is slightly larger and heavier than our sun.

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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