Eta2 Doradus

Eta² Doradus, Latinized from η² Doradus, is a star in the southern constellation of Dorado. It is visible to the naked eye as a dim, reddish star with an apparent visual magnitude of 5.01^[1] It is about 580 light years from the Sun as shown by parallax, and its net movement is one of receding, having a radial velocity of +34.5 km/s.^[1] It is circumpolar south of latitude 24° 24′ S.^[6]

For other stars with this Bayer designation, see η Doradus.

Eta2 Doradus

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Dorado[1]
Right ascension	06h 11m 14.98s[2]
Declination	−65° 35′ 21.9″[2]
Apparent magnitude (V)	5.01[1]
Characteristics
Evolutionary stage	AGB[3]
Spectral type	M2.5III[1]
B−V color index	1.599[1]
Astrometry
Radial velocity (Rv)	+34.5±0.8[1] km/s
Proper motion (μ)	RA: −23.823[2] mas/yr Dec.: +118.639[2] mas/yr
Parallax (π)	5.6046±0.1562 mas[2]
Distance	580 ± 20 ly (178 ± 5 pc)
Absolute magnitude (MV)	−1.45[1]
Details
Mass	1.4[4] M☉
Radius	81.89[2] R☉
Luminosity	1,165[2] L☉
Surface gravity (log g)	1.61[4] cgs
Temperature	3,726+313 −154[2] K
Metallicity [Fe/H]	−0.13[4] dex
Other designations
η2 Dor, CPD−65°561, FK5 2473, GC 7946, HD 43455, HIP 29353, HR 2245, SAO 249469, PPM 355229, TYC 8901-1098-1[5]
Database references
SIMBAD	data

This object is an M-type giant star, with its stellar classification being M2.5III.^[1][7] It has left the main sequence after exhausting its core hydrogen and expanded to around 80 R_☉. The star is radiating about 1,200 times the Sun's luminosity from its photosphere, at an effective temperature of 3,726 K.^[2]