astro.wikisort.org - Star

Search / Calendar

R Horologii is a red giant star approximately 1,000 light-years away in the southern constellation of Horologium.[10] It is a Mira variable with a period of 404.83 days,[11] ranging from apparent magnitude 4.7 to 14.3—one of the largest ranges in brightness known of stars in the night sky visible to the unaided eye.[2] The star is losing mass at the rate of 5.9×10−7 M☉·y−1.[7]

R Horologii

R Horologii (R) in Horologium
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Horologium
Right ascension 02h 53m 52.77465s[1]
Declination −49° 53′ 22.7330″[1]
Apparent magnitude (V) 4.7 - 14.3[2]
Characteristics
Spectral type M5-7e[3]
B−V color index 1.044±0.011[4]
Variable type Mira Ceti[5]
Astrometry
Radial velocity (Rv)+60.0±4.4[6] km/s
Proper motion (μ) RA: +125.698[1] mas/yr
Dec.: +35.975[1] mas/yr
Parallax (π)3.1999 ± 0.3632 mas[1]
Distanceapprox. 1,000 ly
(approx. 310 pc)
Details
Temperature2,200[7] K
Other designations
R Hor, CD−50° 860, HD 18242, HIP 13502, HR 868[8]
Database references
SIMBADdata
The light curve of R Horologii from AAVSO V band data[9]
The light curve of R Horologii from AAVSO V band data[9]

References


  1. 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.
  2. Privett, Grant; Jones, Kevin (2013). The Constellation Observing Atlas. New York, New York: Springer Science & Business Media. p. 102. ISBN 9781461476481.
  3. Keenan, Philip C. (June 1966). "A Catalogue of Spectra of Mira Variables of Types ME and Se". Astrophysical Journal Supplement. 13: 333. Bibcode:1966ApJS...13..333K. doi:10.1086/190139.
  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. Samus', N. N; Kazarovets, E. V; Durlevich, O. V; Kireeva, N. N; Pastukhova, E. N (2017). "General catalogue of variable stars: Version GCVS 5.1". Astronomy Reports. 61 (1): 80. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
  6. Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35495 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.
  7. Danilovich, T.; et al. (October 2017), "Sulphur-bearing molecules in AGB stars. I. The occurrence of hydrogen sulphide", Astronomy & Astrophysics, 606: 14, arXiv:1707.06003, Bibcode:2017A&A...606A.124D, doi:10.1051/0004-6361/201731203, S2CID 55533463, A124
  8. "R Horologii". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 18 March 2016.
  9. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  10. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–64. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  11. Templeton, M. R.; Mattei, J. A.; Willson, L. A. (2005). "Secular Evolution in Mira Variable Pulsations". The Astronomical Journal. 130 (2): 776–788. arXiv:astro-ph/0504527. Bibcode:2005AJ....130..776T. doi:10.1086/431740. S2CID 359940.


This variable star–related article is a stub. You can help Wikipedia by expanding it.

  • v
  • t
  • e

На других языках

- [en] R Horologii

[es] R Horologii

R Horologii (R Hor / HD 18242 / HR 868 / HIP 13502)[1][2] es una estrella variable en la constelación de Horologium. Cuando alcanza su brillo máximo —magnitud aparente +4,7— es la segunda estrella más brillante de su constelación después de α Horologii. Se encuentra a unos 1000 años luz de distancia del Sistema Solar.


Текст в блоке "Читать" взят с сайта "Википедия" и доступен по лицензии Creative Commons Attribution-ShareAlike; в отдельных случаях могут действовать дополнительные условия.

Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.

2019-2025
WikiSort.org - проект по пересортировке и дополнению контента Википедии