| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 44m 42.1323s [1] |
| Declination | +17° 15′ 51.197″ [1] |
| Apparent magnitude (V) | 6.144 [1] |
| Characteristics | |
| Spectral type | A0V [1] |
| U−B color index | −0.03 [2] |
| B−V color index | 0.00 [2] |
| Astrometry | |
| Radial velocity (Rv) | −5.2 ± 5 [1] km/s |
| Proper motion (μ) |
RA: −30.44
[1]
mas/
yr Dec.: 6.59 [1] mas/ yr |
| Parallax (π) | 10.16 ± 0.79 mas [1] |
| Distance | 320 ± 20
ly (98 ± 8 pc) |
| Absolute magnitude (MV) | 0.88 [3] |
| Details | |
| Radius | 2.0 [4] R☉ |
| Rotational velocity (v sin i) | 76 [2] 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
[1] | |
| Database references | |
| SIMBAD | data |
Tau8 Serpentis, Latinized from τ8 Serpentis, is an A-type main sequence star in the constellation of Serpens, approximately 320 light-years from the Earth. [1] It has an apparent visual magnitude of approximately 6.144. [1] 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. [5]
References
- ^ a b c d e f g h i j k * 26 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
- ^ a b c 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.
- ^ 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.
- ^ HD 140729, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line September 19, 2008.
- ^ ICCD speckle observations of binary stars. X - A further survey for duplicity among the bright stars, Harold A. McAlister, Brian D. Mason, William I. Hartkopf, and Michael M. Shara, Astronomical Journal 106, #4 (October 1993), pp. 1639–1655, doi: 10.1086/116753, Bibcode: 1993AJ....106.1639M.
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 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |
| Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
|---|---|
| Constellation | Serpens |
| Right ascension | 15h 44m 42.1323s [1] |
| Declination | +17° 15′ 51.197″ [1] |
| Apparent magnitude (V) | 6.144 [1] |
| Characteristics | |
| Spectral type | A0V [1] |
| U−B color index | −0.03 [2] |
| B−V color index | 0.00 [2] |
| Astrometry | |
| Radial velocity (Rv) | −5.2 ± 5 [1] km/s |
| Proper motion (μ) |
RA: −30.44
[1]
mas/
yr Dec.: 6.59 [1] mas/ yr |
| Parallax (π) | 10.16 ± 0.79 mas [1] |
| Distance | 320 ± 20
ly (98 ± 8 pc) |
| Absolute magnitude (MV) | 0.88 [3] |
| Details | |
| Radius | 2.0 [4] R☉ |
| Rotational velocity (v sin i) | 76 [2] 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
[1] | |
| Database references | |
| SIMBAD | data |
Tau8 Serpentis, Latinized from τ8 Serpentis, is an A-type main sequence star in the constellation of Serpens, approximately 320 light-years from the Earth. [1] It has an apparent visual magnitude of approximately 6.144. [1] 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. [5]
References
- ^ a b c d e f g h i j k * 26 Ser -- Star, database entry, SIMBAD. Accessed on line September 19, 2008.
- ^ a b c 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.
- ^ 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.
- ^ HD 140729, database entry, Catalog of Apparent Diameters and Absolute Radii of Stars (CADARS), 3rd edition, L. E. Pasinetti-Fracassini, L. Pastori, S. Covino, and A. Pozzi, CDS ID II/224. Accessed on line September 19, 2008.
- ^ ICCD speckle observations of binary stars. X - A further survey for duplicity among the bright stars, Harold A. McAlister, Brian D. Mason, William I. Hartkopf, and Michael M. Shara, Astronomical Journal 106, #4 (October 1993), pp. 1639–1655, doi: 10.1086/116753, Bibcode: 1993AJ....106.1639M.
| Stars |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
|
Star clusters |
| ||||||||||||
| Nebulae |
| ||||||||||||
| Galaxies |
| ||||||||||||
| |||||||||||||
| |||||||||||||
|
| This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |