S Boötis

S Boötis is a Mira variable in the constellation Boötes. It ranges between magnitudes 7.8 and 13.8 over a period of approximately 270 days.[3] It is too faint to be seen with the naked eye, however when it is near maximum brightness it can be seen with binoculars.[9]

Not to be confused with Sigma Boötis.
S Boötis

The visual band light curve of S Boötes, from AAVSO data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 14h 22m 52.9255s[2]
Declination +53° 48′ 37.307″[2]
Apparent magnitude (V) 7.4 - 14.0[3]
Characteristics
Spectral type M3e-6e[3]
B−V color index +1.3[4]
Variable type Mira[3]
Astrometry
Radial velocity (Rv)−17.00[5] km/s
Proper motion (μ) RA: +7.283[2] mas/yr
Dec.: −12.789[2] mas/yr
Parallax (π)0.5746 ± 0.0407 mas[2]
Distance5,700 ± 400 ly
(1,700 ± 100 pc)
Details
Mass2.7[6] M☉
Radius491[7] R☉
Luminosity18,793[6] L☉
Surface gravity (log g)−0.53[6] cgs
Temperature3,007[6] K
Age631[6] Myr
Other designations
HIP 70291, SAO 29125, BD+54°1571, HD 126289[8]
Database references
SIMBADdata

S Boötis was discovered at Bonn Observatory by Friedrich Wilhelm Argelander in 1860.[10][11][12]

References
  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  3. VSX (4 January 2010). "S Boötis". AAVSO Website. American Association of Variable Star Observers. Retrieved 17 July 2023.
  4. 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.
  5. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  6. Fouesneau, M.; Andrae, R.; Dharmawardena, T.; Rybizki, J.; Bailer-Jones, C. A. L.; Demleitner, M. (2022). "Astrophysical parameters from Gaia DR2, 2MASS, and AllWISE". Astronomy and Astrophysics. 662: A125. arXiv:2201.03252. Bibcode:2022A&A...662A.125F. doi:10.1051/0004-6361/202141828. S2CID 245837778.
  7. Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv:2109.10912. Bibcode:2022A&A...657A...7K. doi:10.1051/0004-6361/202142146. eISSN 1432-0746. ISSN 0004-6361.
  8. "S Bootis". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 28 September 2014.
  9. Macrobert, Alan. "The Stellar Magnitude System". Sky and Telescope. American Astronomical Society. Retrieved 17 July 2023.
  10. Cannon, Annie J. (1907). "Second catalogue of variable stars". Annals of Harvard College Observatory. 55 (1): 1–94. Retrieved 17 July 2023.
  11. Isles, J. E.; Saw, D. R. B. (February 1987). "Mira Stars, - I. R Ari, R Aur, X Aur, R Boo and S Boo". Journal of the British Astronomical Association. 97 (2): 106-116. Bibcode:1987JBAA...97..106I. Retrieved 17 July 2023.
  12. "S Boo". The International Variable Star Index. AAVSO. Retrieved 17 July 2023.


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