Astronomy:101 Virginis
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Short description: Star in the constellation Boötes
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| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 17m 28.4519s[1] |
| Declination | +15° 15′ 48.167″[1] |
| Apparent magnitude (V) | 5.84[2] (5.74 - 5.90[3]) |
| Characteristics | |
| Spectral type | M3IIIa[2] |
| B−V color index | 1.678[2] |
| Variable type | SRb[3] |
| Astrometry | |
| Radial velocity (Rv) | −11.30[4] km/s |
| Proper motion (μ) | RA: 14.27[1] mas/yr Dec.: 8.80[1] mas/yr |
| Parallax (π) | 3.3735 ± 0.1766[5] mas |
| Distance | 970 ± 50 ly (300 ± 20 pc) |
| Details | |
| Radius | 76.78[5] R☉ |
| Luminosity | 1,078[6] L☉ |
| Temperature | 3,682[6] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, Bright Star Catalogue (5th rev. ed.) | |
101 Virginis is a red giant variable star in the Boötes constellation, currently on the asymptotic giant branch.[7] It was originally catalogued as 101 Virginis by Flamsteed due to an error in the position.[8][9] When it was confirmed as a variable star, it was actually within the border of the constellation Boötes and given the name CY Boötis.[3]
The variability is not strongly defined but a primary period of 23 days and a secondary period of 340 days have been reported.[10]
CY Boo is listed in the Hipparcos catalogue as a "problem binary", a star which was suspected of being multiple but for which the Hipparcos observations did not give a satisfactory solution. Further observations have always shown it to be single.[11]
References
- ↑ 1.0 1.1 1.2 1.3 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. doi:10.1051/0004-6361:20078357. Bibcode: 2007A&A...474..653V.
- ↑ 2.0 2.1 2.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
- ↑ 3.0 3.1 3.2 Kholopov, P. N.; Samus, N. N.; Kazarovets, E. V.; Perova, N. B. (1985). "The 67th Name-List of Variable Stars". Information Bulletin on Variable Stars 2681: 1. Bibcode: 1985IBVS.2681....1K.
- ↑ Famaey, B.; Pourbaix, D.; Frankowski, A.; Van Eck, S.; Mayor, M.; Udry, S.; Jorissen, A. (2009). "Spectroscopic binaries among Hipparcos M giants,. I. Data, orbits, and intrinsic variations". Astronomy and Astrophysics 498 (2): 627. doi:10.1051/0004-6361/200810698. Bibcode: 2009A&A...498..627F.
- ↑ 5.0 5.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 6.0 6.1 McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (2012). "Fundamental parameters and infrared excesses of Hipparcos stars". Monthly Notices of the Royal Astronomical Society 427 (1): 343–357. doi:10.1111/j.1365-2966.2012.21873.x. Bibcode: 2012MNRAS.427..343M.
- ↑ Eggen, Olin J. (1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal 104: 275. doi:10.1086/116239. Bibcode: 1992AJ....104..275E.
- ↑ Davies, H. S. (1905). "Flamsteed and Piazzi Identities". Popular Astronomy 13: 423. Bibcode: 1905PA.....13..423D. https://archive.org/details/sim_popular-astronomy_1905-10_13_8/page/423.
- ↑ Wagman, M. (1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy 18 (3): 209. doi:10.1177/002182868701800305. Bibcode: 1987JHA....18..209W.
- ↑ Percy, J. R.; Dunlop, H.; Kassim, L.; Thompson, R. R. (2001). "Periods of 25 Pulsating Red Giants". Information Bulletin on Variable Stars 5041: 1. Bibcode: 2001IBVS.5041....1P.
- ↑ Mason, Brian D.; Martin, Christian; Hartkopf, William I.; Barry, Donald J.; Germain, Marvin E.; Douglass, Geoffrey G.; Worley, Charles E.; Wycoff, Gary L. et al. (1999). "Speckle Interferometry of New and Problem HIPPARCOS Binaries". The Astronomical Journal 117 (4): 1890. doi:10.1086/300823. Bibcode: 1999AJ....117.1890M.
External links
- VizieR: HR 5352
- Aladin: Image 101 Virginis
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