Epsilon Sculptoris (ε Scl, ε Sculptoris) is a binary star[12] in the constellation Sculptor. It is approximately 91.7 light years from Earth.[1]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Sculptor |
Right ascension | 01h 45m 38.75712s[1] |
Declination | −25° 03′ 09.4022″[1] |
Apparent magnitude (V) | 5.29[2] |
Characteristics | |
Spectral type | F2V[3] + G9V[4] |
U−B color index | +0.01[5] |
B−V color index | +0.39[6] |
Astrometry | |
Radial velocity (Rv) | +13.10[7] km/s |
Proper motion (μ) | RA: +159.36[1] mas/yr Dec.: -73.17[1] mas/yr |
Parallax (π) | 35.57 ± 0.52 mas[1] |
Distance | 92 ± 1 ly (28.1 ± 0.4 pc) |
Absolute magnitude (MV) | 3.05[2] |
Details | |
ε Scl A | |
Mass | 1.44[8] M☉ |
Radius | 1.5[9] R☉ |
Luminosity | 5.07[2] L☉ |
Surface gravity (log g) | 4.24[10] cgs |
Temperature | 6,809[10] K |
Metallicity [Fe/H] | -0.02[2] dex |
Rotational velocity (v sin i) | 86[11] km/s |
ε Scl B | |
Mass | 0.84[8] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
The primary component, Epsilon Sculptoris A, is a yellow-white F-type main-sequence star[3] with an apparent magnitude of +5.29.[2] 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 +8.6. A and B make one orbit around their centre of mass once every 1200 years.[13]
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.[14]
This star will be in constellation Fornax around 2920 CE.[15]