101 Virginis
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas[5] |
| 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[edit]
- ^ a b c d Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
- ^ a b c 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 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. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698. S2CID 18739721.
- ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b 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. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
- ^ Eggen, Olin J. (1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
- ^ Davies, H. S. (1905). "Flamsteed and Piazzi Identities". Popular Astronomy. 13: 423. Bibcode:1905PA.....13..423D.
- ^ Wagman, M. (1987). "Flamsteed's Missing Stars". Journal for the History of Astronomy. 18 (3): 209. Bibcode:1987JHA....18..209W. doi:10.1177/002182868701800305. S2CID 118445625.
- ^ 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.; Ten Brummelaar, Theo; Franz, Otto G. (1999). "Speckle Interferometry of New and Problem HIPPARCOS Binaries". The Astronomical Journal. 117 (4): 1890. Bibcode:1999AJ....117.1890M. doi:10.1086/300823.
External links[edit]
- VizieR: HR 5352
- Aladin: Image 101 Virginis
