Astronomy:Tau8 Serpentis
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Short description: Star in the constellation Serpens
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Serpens[1] |
| Right ascension | 15h 44m 42.1323s[2] |
| Declination | +17° 15′ 51.199″[2] |
| Apparent magnitude (V) | 6.1[3] |
| Characteristics | |
| Evolutionary stage | main sequence[4] |
| Spectral type | A0V[5] |
| U−B color index | −0.03[6] |
| B−V color index | 0.00[6] |
| Astrometry | |
| Radial velocity (Rv) | −7.47±0.53[2] km/s |
| Proper motion (μ) | RA: −28.655[2] mas/yr Dec.: +4.476[2] mas/yr |
| Parallax (π) | 8.9643 ± 0.0409[2] mas |
| Distance | 364 ± 2 ly (111.6 ± 0.5 pc) |
| Absolute magnitude (MV) | 0.88[1] |
| Details | |
| Mass | 2.5[7] M☉ |
| Radius | 2.3[7] R☉ |
| Luminosity | 44[7] L☉ |
| Surface gravity (log g) | 4.09[7] cgs |
| Temperature | 9,727[7] K |
| Rotational velocity (v sin i) | 117[4] 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[5] | |
| 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.[5] It has an apparent visual magnitude of approximately 6.144.[5] 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.[8]
References
- ↑ 1.0 1.1 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355. Bibcode: 2000A&A...355L..27H.
- ↑ 4.0 4.1 Zorec, J.; Royer, F. (2012). "Rotational velocities of A-type stars. IV. Evolution of rotational velocities". Astronomy and Astrophysics 537: A120. doi:10.1051/0004-6361/201117691. Bibcode: 2012A&A...537A.120Z.
- ↑ 5.0 5.1 5.2 5.3 * 26 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
- ↑ 6.0 6.1 HR 5858, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Accessed on line September 19, 2008.
- ↑ 7.0 7.1 7.2 7.3 7.4 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ McAlister, Harold A.; Mason, Brian D.; Hartkopf, William I.; Shara, Michael M. (1993). "ICCD Speckle Observations of Binary Stars. X. A Further Survey for Duplicity Among the Bright Stars". The Astronomical Journal 106: 1639. doi:10.1086/116753. Bibcode: 1993AJ....106.1639M.
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