Astronomy:e Ophiuchi
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Short description: Star in the Ophiuchus constellation
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Ophiuchus[1] |
| Right ascension | 17h 18m 36.99s[2] |
| Declination | +10° 51′ 52.1″[2] |
| Apparent magnitude (V) | 5.03[3] |
| Characteristics | |
| Evolutionary stage | red giant branch[4] |
| Spectral type | K4II-III[3] |
| U−B color index | 1.89[3] |
| B−V color index | 1.55[3] |
| R−I color index | 0.83[citation needed] |
| Astrometry | |
| Radial velocity (Rv) | 1.89 km/s |
| Proper motion (μ) | RA: +7.676[2] mas/yr Dec.: −97.830[2] mas/yr |
| Parallax (π) | 6.3784 ± 0.1045[2] mas |
| Distance | 511 ± 8 ly (157 ± 3 pc) |
| Absolute magnitude (MV) | −0.86[1] |
| Details | |
| Mass | 1.1[4] M☉ |
| Radius | 53[4] R☉ |
| Luminosity | 554[4] L☉ |
| Surface gravity (log g) | 1.06[4] cgs |
| Temperature | 3,836[4] K |
| Rotational velocity (v sin i) | 5.47[5] km/s |
| Age | 10.3[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
e Ophiuchi (HD 156681) is a star in the constellation Ophiuchus near the border with Hercules, which it had been mistakenly catalogued 66 Herculis.[7] It has an apparent magnitude of 5.03.
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 XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 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.
- ↑ 3.0 3.1 3.2 3.3 "VizieR Detailed Page". http://vizier.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=5050&-corr=PK=HR&-out.max=9999&HR=6433. Retrieved 2012-07-13.
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 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. doi:10.1051/0004-6361/201322360. Bibcode: 2015A&A...574A.116R.
- ↑ Hekker, S.; Meléndez, J. (2007). "Precise radial velocities of giant stars. III. Spectroscopic stellar parameters". Astronomy and Astrophysics 475 (3): 1003. doi:10.1051/0004-6361:20078233. Bibcode: 2007A&A...475.1003H.
- ↑ "e Ophiuchi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=e+Ophiuchi.
- ↑ Wagman, M. (August 1987), "Flamsteed's Missing Stars", Journal for the History of Astronomy 18 (3): 209–223, doi:10.1177/002182868701800305, Bibcode: 1987JHA....18..209W.
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