Epsilon Sculptoris

Epsilon Sculptoris (ε Scl, ε Sculptoris) is a binary star^[16] in the constellation Sculptor. It is 91 light years from Earth and has a combined apparent magnitude of +5.29.

ε Sculptoris

Location of ε Sculptoris (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Sculptor[1]
Right ascension	01h 45m 38.75712s[2]
Declination	−25° 03′ 09.4022″[2]
Apparent magnitude (V)	5.29[1]
Characteristics
A
Evolutionary stage	main sequence[3]
Spectral type	F2V[4]
U−B color index	+0.01[5]
B−V color index	+0.40[5]
B
Evolutionary stage	main sequence[6]
Spectral type	G9V[7]
Astrometry
Radial velocity (Rv)	+13.10[8] km/s
Absolute magnitude (MV)	+3.05[1]
A
Proper motion (μ)	RA: +165.847[3] mas/yr Dec.: −49.654[3] mas/yr
Parallax (π)	35.6418±0.0719 mas[3]
Distance	91.5 ± 0.2 ly (28.06 ± 0.06 pc)
B
Proper motion (μ)	RA: +138.593[9] mas/yr Dec.: −44.200[9] mas/yr
Parallax (π)	35.7514±0.0313 mas[9]
Distance	91.23 ± 0.08 ly (27.97 ± 0.02 pc)
Orbit[10]
Period (P)	2,198.3 yr
Semi-major axis (a)	17.06″
Eccentricity (e)	0.857
Inclination (i)	105.3°
Details
ε Scl A
Mass	1.44[11] M☉
Radius	1.5[12] R☉
Luminosity	5.07[1] L☉
Surface gravity (log g)	4.24[13] cgs
Temperature	6,809[13] K
Metallicity [Fe/H]	−0.02[1] dex
Rotational velocity (v sin i)	86[14] km/s
Age	1.6[3] Gyr
ε Scl B
Mass	0.84[11] M☉
Radius	0.74[15] R☉
Luminosity	0.30[15] L☉
Surface gravity (log g)	4.62[15] cgs
Temperature	4,973[15] K
Other designations
ADS 1394, CCDM J01456-2504AB, CD−25°704, FK5 61, GC 2145, HD 10830, HIP 8209, HR 514, SAO 167275, WDS J01456-2503AB
Database references
SIMBAD	data

The primary component, Epsilon Sculptoris A, is a yellow-white F-type main-sequence star^[4] with an apparent magnitude of +5.34.^[17] Orbiting it with a separation of 4.6 arcseconds, or at least 125 astronomical units, is Epsilon Sculptoris B, a yellow G-type main sequence dwarf with an apparent magnitude of +8.50.^[18] A and B make one orbit around their centre of mass once every 1200 years.^[19]

There are two optical companions, the 15th magnitude designated Epsilon Sculptoris C at an angular separation of 15 arcseconds and the 11th magnitude Epsilon Sculptoris D, at a separation of 142 arcseconds.^[20] Both these faint stars have small Gaia parallaxes indicating a much greater distance than the Epsilon Sculptoris pair.^[21]

This star will be in constellation Fornax around 2920 CE.^[22]