Eta1 Doradus

Eta¹ Doradus, Latinized from η¹ Doradus, is a star in the southern constellation of Dorado. It is visible to the naked eye as a dim, white-hued star with an apparent visual magnitude of 5.72.^[2] This object is located approximately 335 light years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of +18 km/s.^[2] It is circumpolar south of latitude 24°S.

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

Eta¹ Doradus

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Dorado
Right ascension	06h 06m 09.38154s[1]
Declination	−66° 02′ 22.6304″[1]
Apparent magnitude (V)	5.72[2]
Characteristics
Spectral type	A0V[3]
U−B color index	−0.024±0.004[2]
B−V color index	−0.03[4]
Astrometry
Radial velocity (Rv)	+17.6±4.3[2] km/s
Proper motion (μ)	RA: +13.656[1] mas/yr Dec.: +27.815[1] mas/yr
Parallax (π)	9.7251±0.1094 mas[1]
Distance	335 ± 4 ly (103 ± 1 pc)
Absolute magnitude (MV)	+0.75[2]
Details
Mass	2.46[5] M☉
Luminosity	49[6] L☉
Surface gravity (log g)	4.09±0.08[7] cgs
Temperature	10,325±240[7] K
Rotational velocity (v sin i)	149[5] km/s
Age	94[5] Myr
Other designations
η1 Dor, CPD−66° 493, GC 7813, HD 42525, HIP 28909, HR 2194, SAO 249448, PPM 355182, TYC 8905-1950-1[8]
Database references
SIMBAD	data

This object is an A-type main-sequence star with a stellar classification of A0V.^[3] It is 94^[5] million years old with a high rotation rate, showing a projected rotational velocity of 149.^[5] The star has 2.46^[5] times the mass of the Sun and is radiating 49^[6] times the Sun's luminosity from its photosphere at an effective temperature of 10,325 K.^[7] It is the southern pole star of Venus.^[9]