Tau8 Serpentis
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 44m 42.1323s |
| Declination | +17° 15′ 51.199″ |
| Apparent magnitude (V) | 6.1 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A0V |
| U−B color index | −0.03 |
| B−V color index | 0.00 |
| Astrometry | |
| Radial velocity (Rv) | −7.47±0.53 km/s |
| Proper motion (μ) | RA: −28.655 mas/yr Dec.: +4.476 mas/yr |
| Parallax (π) | 8.9643±0.0409 mas |
| Distance | 364 ± 2 ly (111.6 ± 0.5 pc) |
| Absolute magnitude (MV) | 0.88 |
| Details | |
| Mass | 2.5 M☉ |
| Radius | 2.3 R☉ |
| Luminosity | 44 L☉ |
| Surface gravity (log g) | 4.09 cgs |
| Temperature | 9,727 K |
| Rotational velocity (v sin i) | 117 km/s |
| Other designations | |
| τ8 Ser, Tau8 Ser, 26 Serpentis, BD+17°2906, GC 21164, HD 140729, HIP 77111, HR 5858, SAO 101712, PPM 131656 | |
| Database references | |
| SIMBAD | data |
Tau8 Serpentis, Latinized from τ8 Serpentis, is an A-type main sequence star in the constellation of Serpens, approximately 364 light-years from the Earth. It has an apparent visual magnitude of approximately 6.144. Although it was observed to be binary by speckle interferometry in 1985, subsequent observations show no sign of binarity, and the detection appears to have been spurious.