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.^[1] This object is located approximately 342 light years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of +18 km/s.^[1] 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[1]
Right ascension	06h 06m 09.38177s[2]
Declination	−66° 02′ 22.6352″[2]
Apparent magnitude (V)	5.72[1]
Characteristics
Evolutionary stage	main sequence[2]
Spectral type	A0V[3]
U−B color index	−0.024±0.004[1]
B−V color index	−0.03[4]
Astrometry
Radial velocity (Rv)	+17.6±4.3[1] km/s
Proper motion (μ)	RA: +13.575[2] mas/yr Dec.: +28.139[2] mas/yr
Parallax (π)	9.5464±0.0474 mas[2]
Distance	342 ± 2 ly (104.8 ± 0.5 pc)
Absolute magnitude (MV)	+0.75[1]
Details
Mass	2.46[5] M☉
Radius	2.5[6] R☉
Luminosity	49[7] L☉
Surface gravity (log g)	4.09±0.08[8] cgs
Temperature	10,325±240[8] 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[9]
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^[7] times the Sun's luminosity from its photosphere at an effective temperature of 10,325 K.^[8] It is the northern pole star of Venus.^[10]