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Open Access Articles- Top Results for 7 Aquarii

7 Aquarii

7 Aquarii <tr><td colspan="2" style="text-align:center;">

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Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 20h 56m 54.0278s
Declination -09° 41′ 51.161″
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This page is a soft redirect. Apparent magnitude (V)

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Characteristics
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This page is a soft redirect. K5III

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This page is a soft redirect. 1.71

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This page is a soft redirect. B−V color index

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This page is a soft redirect. 1.47

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This page is a soft redirect. Variable star <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>-32.7 km/s</td></tr><tr style="vertical-align:top;"><td>Proper motion (μ)</td><td> RA: -3.51 mas/yr
Dec.: -11.53 mas/yr </td></tr><tr style="vertical-align:top;"><td>Parallax (π)</td><td>5.42 ± 0.99 mas</td></tr><tr style="vertical-align:top;"><td>Distance</td><td>approx. 600 ly
(approx. 180 pc)</td></tr><tr style="vertical-align:top;"><td>Absolute magnitude (MV)</td><td>7.002</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>0,8 M</td></tr><tr style="vertical-align:baseline;"><td>Radius</td><td>0,9 R</td></tr><tr style="vertical-align:baseline;"><td>Luminosity</td><td>0,4 L</td></tr><tr style="vertical-align:baseline;"><td>Temperature</td><td>3,500–5,000 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>7 Aquarii B</td></tr><tr style="vertical-align:baseline;"><td>Semi-major axis (a)</td><td>2.1"</td></tr><tr style="vertical-align:baseline;"><td>Inclination (i)</td><td>165°</td></tr> <tr><td style="background-color: #FFFFC0;" colspan="2" align=center>Orbit</td></tr><tr style="vertical-align:baseline;"><td>Companion</td><td>7 Aquarii C</td></tr><tr style="vertical-align:baseline;"><td>Semi-major axis (a)</td><td>176.5"</td></tr><tr style="vertical-align:baseline;"><td>Inclination (i)</td><td>67°</td></tr>

<tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Other designations</th></tr><tr><td colspan="2">
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.
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<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> <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>

Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.) </div>

7 Aquarii is a variable star in the constellation Aquarius. 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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