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] |
|
|---|
| 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 |
|
|---|
| 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 |
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]
References
- ^ a b Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e f g h i j k * 19 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
- ^ a b c d HR 5840, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed September 19, 2008.
- ^ a b c d e f g Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars. VII. Occurrence rate of giant extrasolar planets as a function of mass and metallicity". Astronomy and Astrophysics. 574: A116. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360.
- ^ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics. 475 (3): 1003. arXiv:0709.1145. Bibcode:2007A&A...475.1003H. doi:10.1051/0004-6361:20078233.
Category