| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
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|---|---|
| Constellation | Serpens |
| Right ascension | 15h 41m 54.7132s[1] |
| Declination | +18° 27′ 50.532″[1] |
| Apparent magnitude (V) | 5.804[1] |
| Characteristics | |
| Spectral type | A2m[1] |
| U−B color index | +0.11[2] |
| B−V color index | +0.20[2] |
| R−I color index | +0.10[2] |
| 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[1] mas |
| Distance | 174 ± 8 ly (53 ± 2 pc) |
| Absolute magnitude (MV) | 2.17[3] |
| Details | |
| Rotational velocity (v sin i) | 20[2] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Tau7 Serpentis (Tau7 Ser, τ7 Serpentis, τ7 Ser) 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]
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