R Reticuli

R Reticuli is a Mira variable star in the southern constellation Reticulum. It is an aging red giant star on the asymptotic giant branch[4] with a stellar classification that varies between M4e to M7.5e,[5] being hottest near maximum visual magnitude.[8] The brightness of the star varies between apparent visual magnitudes 6.35 and 14.2[3] with an average period of 281.08±0.58 d.[9] The mean maximum magnitude is 7.57 and the mean minimum magnitude 13.80.[9]

R Reticuli
Observation data
Epoch J2000      Equinox J2000
Constellation Reticulum
Right ascension 04h 33m 32.82893s[1]
Declination −63° 01′ 44.9867″[1]
Apparent magnitude (V) 9.23[2] (6.35 – 14.2)[3]
Characteristics
Evolutionary stage AGB[4]
Spectral type M4e - M7.5e[5]
B−V color index 1.099±0.045[2]
Variable type Mira[5]
Astrometry
Radial velocity (Rv)26.0±4.6[2] km/s
Proper motion (μ) RA: +12.881[1] mas/yr
Dec.: +15.826[1] mas/yr
Parallax (π)0.6439 ± 0.1184[1] mas
Distance930±13[6] pc
Details
Mass0.88+0.04
−0[6] M☉
Radius249+21
−34[1] R☉
Luminosity7,571±1,671[1] L☉
Surface gravity (log g)−0.445[6] cgs
Temperature3,410+264
−131[1] K
Metallicity [Fe/H]0.55[6] dex
Other designations
R Ret, S Ret, HD 29383, HIP 21252, SAO 249053[7]
Database references
SIMBADdata

Although this star was also assigned the variable star designation S Reticuli, this designation is no longer in use.[3]

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. 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.
  3. VSX; Otero, S. A. (28 January 2011). "R Reticuli". AAVSO Website. American Association of Variable Star Observers. Retrieved 25 May 2014.
  4. Whitelock, Patricia A.; et al. (May 2008). "AGB variables and the Mira period-luminosity relation". Monthly Notices of the Royal Astronomical Society. 386 (1): 313–323. arXiv:0801.4465. Bibcode:2008MNRAS.386..313W. doi:10.1111/j.1365-2966.2008.13032.x. S2CID 17676993.
  5. Samus, N. N.; et al. (2017). "General Catalogue of Variable Stars". Astronomy Reports. 5.1. 61 (1): 80–88. Bibcode:2017ARep...61...80S. doi:10.1134/S1063772917010085. S2CID 125853869.
  6. Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; De Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. S2CID 131780028.
  7. "R Ret". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-11-18.
  8. Skiff, B. A. (2014). "VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009- )". VizieR On-line Data Catalog. Bibcode:2014yCat....1.2023S.
  9. Vogt, N.; et al. (November 2016). "Determination of Pulsation Periods and Other Parameters of 2875 Stars Classified as MIRA in the All Sky Automated Survey (ASAS)". The Astrophysical Journal Supplement Series. 227 (1): 13. arXiv:1609.05246. Bibcode:2016ApJS..227....6V. doi:10.3847/0067-0049/227/1/6. S2CID 119295645. 6.


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