Article · Wikipedia archive · Last revised Jul 22, 2026

R Normae

R Normae is a Mira variable star located near Eta Normae in the southern constellation of Norma. This is an intermediate-mass red giant star that is generating part of its energy through hydrogen fusion. Because this fusion is thought to be occurring under conditions of convection, it is generating an excess of lithium. The star ranges from magnitude 6.5 to 12.8 and has a relatively long period of 496 days. Located around 2,900 light-years distant, it shines with a luminosity 7764 times that of the Sun and has a surface temperature of 3161 K.

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Jul 22, 2026
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R Normae

The visual band light curve of R Normae, from AAVSO data1
Observation data
Epoch J2000      Equinox ICRS
Constellation Norma2
Right ascension 15h 35m 57.35429s3
Declination −49° 30′ 28.6817″3
Apparent magnitude (V) 6.5–12.82
Characteristics
Spectral type M3e-M7II2
U−B color index +1.334
B−V color index +1.774
Variable type Mira5
Astrometry
Radial velocity (Rv)−22.06 km/s
Proper motion (μ) RA: −0.633 mas/yr
Dec.: −7.093 mas/yr
Parallax (π)1.72±2.79 mas3
Distance2,9007 ly
(9007 pc)
Details
Mass5.758 M☉
Luminosity7,7649 L☉
Surface gravity (log g)1.308 cgs
Temperature3,1619 K
Metallicity [Fe/H]−0.338 dex
Other designations
R Nor, CD−49°9787, GC 20939, GSC 08304-00824, HD 138743, HIP 76377, HIC 76377, SAO 22594810
Database references
SIMBADdata

R Normae is a Mira variable star located near Eta Normae11 in the southern constellation of Norma. This is an intermediate-mass red giant star that is generating part of its energy through hydrogen fusion. Because this fusion is thought to be occurring under conditions of convection, it is generating an excess of lithium.12 The star ranges from magnitude 6.5 to 12.8 and has a relatively long period of 496 days.2 Located around 2,9007 light-years distant, it shines with a luminosity 7764 times that of the Sun and has a surface temperature of 3161 K.9

References

References

  1. "Download Data". aavso.org. AAVSO. Retrieved 1 October 2021.
  2. Watson, Christopher (12 March 2014). "R Normae". AAVSO Website. American Association of Variable Star Observers. Retrieved 21 March 2015.
  3. 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. Vizier catalog entry
  4. Landolt, A. U. (October 1973). "UBV observations of long-period variable stars, VIII". Publications of the Astronomical Society of the Pacific. 85: 625. Bibcode:1973PASP...85..625L. doi:10.1086/129515.
  5. Uttenthaler, S.; van Stiphout, K.; Voet, K.; van Winckel, H.; et al. (2011). "The evolutionary state of Miras with changing pulsation periods". Astronomy & Astrophysics. 531: A88. arXiv:1105.2198. Bibcode:2011A&A...531A..88U. doi:10.1051/0004-6361/201116463. S2CID 56226953.
  6. Turon, C.; et al. (July 1993). "Version 2 of the HIPPARCOS Input Catalogue". Bulletin Inf. Cent. Donnees Astron. Strasbourg. 43: 5. Bibcode:1993BICDS..43....5T.
  7. Whitelock, Patricia; Marang, Freddy; Feast, Michael (December 2000). "Infrared colours for Mira-like long-period variables found in the (M-dot <~ 10−7 M☉ yr−1) Hipparcos Catalogue". Monthly Notices of the Royal Astronomical Society. 319 (3): 728–758. Bibcode:2000MNRAS.319..728W. doi:10.1046/j.1365-8711.2000.03743.x.
  8. Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024). "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost". Astronomy and Astrophysics. 691: A98. arXiv:2407.06963. Bibcode:2024A&A...691A..98K. doi:10.1051/0004-6361/202451427.
  9. 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): 343–57. arXiv:1208.2037. Bibcode:2012MNRAS.427..343M. doi:10.1111/j.1365-2966.2012.21873.x. S2CID 118665352.
  10. "V* R Normae -- Variable Star of Mira Ceti type". SIMBAD Astronomical Database. Centre de Données astronomiques de Strasbourg. Retrieved 21 March 2015.
  11. Arnold, H.J.P; Doherty, Paul; Moore, Patrick (1999). The Photographic Atlas of the Stars. Boca Raton, Florida: CRC Press. p. 176. ISBN 978-0-7503-0654-6.
  12. Uttenthaler, S.; et al. (2012). "Lithium destruction and production observed in red giant stars". Memorie della Societa Astronomica Italiana Supplement. 22: 56. arXiv:1206.2759. Bibcode:2012MSAIS..22...56U.