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Star in the constellation Serpens From Wikipedia, the free encyclopedia
Tau7 Serpentis, Latinized from τ7 Serpentis, is an A-type star in the constellation of Serpens, approximately 174 light-years from the Earth.[1] It has an apparent visual magnitude of approximately 5.804.[1]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Serpens |
Right ascension | 15h 41m 54.7132s[1] |
Declination | +18° 27′ 50.532″[1] |
Apparent magnitude (V) | 5.804[1] |
Characteristics | |
Spectral type | A8Vam[2] |
U−B color index | +0.11[3] |
B−V color index | +0.20[3] |
R−I color index | +0.10[3] |
Astrometry | |
Radial velocity (Rv) | −29.5±2[1] km/s |
Proper motion (μ) | RA: −73.00[1] mas/yr Dec.: +56.85[1] mas/yr |
Parallax (π) | 18.78 ± 0.82 mas[1] |
Distance | 174 ± 8 ly (53 ± 2 pc) |
Absolute magnitude (MV) | +2.18[4] |
Details | |
Luminosity | 11[4] L☉ |
Rotational velocity (v sin i) | 20[3] km/s |
Other designations | |
Database references | |
SIMBAD | data |
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