R Reticuli

R Reticuli, also listed under the duplicate variable star designation S Reticuli,^[4] is a Mira variable star in the southern constellation Reticulum. It is an aging red giant star on the asymptotic giant branch^[5] with a stellar classification that varies between M4e to M7.5e,^[6] being hottest near maximum visual magnitude.^[10] The brightness of the star varies between apparent visual magnitudes 6.35 and 14.2^[4] with an average period of 281.08±0.58 d.^[11] The mean maximum magnitude is 7.57 and the mean minimum magnitude 13.80.^[11]

R Reticuli

The visual band light curve of R Reticui, from AAVSO data[1]
Observation data Epoch J2000      Equinox J2000
Constellation	Reticulum
Right ascension	04h 33m 32.83070s[2]
Declination	−63° 01′ 44.9951″[2]
Apparent magnitude (V)	9.23[3] (6.35 – 14.2)[4]
Characteristics
Evolutionary stage	AGB[5]
Spectral type	M4e - M7.5e[6]
B−V color index	1.099±0.045[3]
Variable type	Mira[6]
Astrometry
Radial velocity (Rv)	26.0±4.6[3] km/s
Proper motion (μ)	RA: +12.111[2] mas/yr Dec.: +16.384[2] mas/yr
Parallax (π)	1.3622±0.0492 mas[2]
Distance	2,390 ± 90 ly (730 ± 30 pc)
Details
Mass	0.88+0.04 −0[7] M☉
Radius	249+21 −34[8] R☉
Luminosity	7,571±1,671[8] L☉
Surface gravity (log g)	−0.445[7] cgs
Temperature	3,410+264 −131[8] K
Metallicity [Fe/H]	0.55[7] dex
Other designations
R Ret, S Ret, HD 29383, HIP 21252, SAO 249053[9]
Database references
SIMBAD	data