Eta3 Fornacis

Eta³ Fornacis (η³ Fornacis) is an orange giant in the constellation of Fornax. The star has a spectral type of K2III and an apparent magnitude of 5.47.^[7] The star is visually close to, but unrelated with the similar stars η² Fornacis and η¹ Fornacis.^[7] The star is located at approximately 489 light years away with a luminosity of about 249 L_☉, and is a suspected binary system with the primary being the orange giant.^[8]

η³ Fornacis

Location of η3 Fornacis (top star inside circle)
Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Fornax
Right ascension	02h 50m 40.407s[1]
Declination	−35° 40′ 33.06″[1]
Apparent magnitude (V)	5.47[2]
Characteristics
Evolutionary stage	red giant branch[1]
Spectral type	K2III[3]
U−B color index	+1.31[2]
B−V color index	+1.25[2]
Astrometry
Radial velocity (Rv)	13.10±0.12[1] km/s
Proper motion (μ)	RA: +4.093[1] mas/yr Dec.: −54.551[1] mas/yr
Parallax (π)	6.6631±0.0580 mas[1]
Distance	489 ± 4 ly (150 ± 1 pc)
Absolute magnitude (MV)	−0.26[4]
Details
Mass	3.7[1] M☉
Radius	21.9[1] R☉
Luminosity	249[1] L☉
Surface gravity (log g)	2.27[1] cgs
Temperature	4,717[1] K
Metallicity [Fe/H]	0.156[1] dex
Rotational velocity (v sin i)	<1[5] km/s
Age	217[1] Myr
Other designations
η3 For, CD−36°1070, HD 17829, HIP 13265, HR 848, SAO 193944[6]
Database references
SIMBAD	data