Tau6 Serpentis, Latinized from τ6 Serpentis, is a G-type giant star in the constellation of Serpens, approximately 450 light-years from the Earth.[2] It has an apparent visual magnitude of approximately 6.000,[2] and is a member of the Ursa Major Stream.[3]
Quick Facts Constellation, Right ascension ...
τ6 Serpentis
Observation data
Epoch J2000.0 Equinox J2000.0 (ICRS) |
| Constellation |
Serpens[1] |
| Right ascension |
15h 40m 59.1008s[2] |
| Declination |
+16° 01′ 28.517″[2] |
| Apparent magnitude (V) |
6.000[2] |
| Characteristics |
| Spectral type |
G8III[2] |
| U−B color index |
+0.61[3] |
| B−V color index |
+0.90[3] |
| R−I color index |
+0.46[3] |
| Astrometry |
|---|
|
|---|
| Radial velocity (Rv) | 3.4±0.9[2] km/s |
| Proper motion (μ) | RA: 22.16[2] mas/yr
Dec.: −16.80[2] mas/yr |
| Parallax (π) | 7.24±0.79 mas[2] |
| Distance | approx. 450 ly
(approx. 140 pc) |
| Absolute magnitude (MV) | −0.33[1] |
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|---|
| Details |
|---|
|
|---|
| Mass | 3.2[4] M☉ |
| Radius | 15[4] R☉ |
| Luminosity | 137[4] L☉ |
| Surface gravity (log g) | 2.64[4] cgs |
| Temperature | 5,126[4] K |
| Metallicity [Fe/H] | −0.01[4] dex |
| Rotational velocity (v sin i) | 4,5[5] km/s |
| Age | 310[4] Myr |
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|---|
| Other designations |
|---|
| τ6 Ser, 19 Serpentis, BD+16°2816, GC 21089, HD 140027, HIP 76810, HR 5840, SAO 101678, PPM 131601
τ6 Ser, Tau6 Serpentis, Tau6 Ser, 19 Serpentis, 19 Ser, BD+16 2816, GC 21089, HD 140027, HIP 76810, HR 5840, PPM 131601, SAO 101678.[2] |
| Database references |
|---|
| SIMBAD | data |
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