Lambda2 Sculptoris
Star in the constellation Sculptor / From Wikipedia, the free encyclopedia
Lambda2 Sculptoris is an orange-hued star in the southern constellation of Sculptor. On dark nights it is faintly visible to the naked eye, having an apparent visual magnitude of +5.90.[2] Based upon an annual parallax shift of 9.63 mas as measured from Earth,[1] it is located roughly 340 light-years from the Sun. It has a relatively large proper motion, advancing 0.284±0.015 arcsecond per year across the sky.[8]
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Sculptor |
Right ascension | 00h 44m 12.09871s[1] |
Declination | −38° 25′ 18.0704″[1] |
Apparent magnitude (V) | +5.90[2] |
Characteristics | |
Spectral type | K1 III[3] |
B−V color index | +1.15[2] |
Astrometry | |
Radial velocity (Rv) | +26.5[4] km/s |
Proper motion (μ) | RA: +246.29[1] mas/yr Dec.: +120.53[1] mas/yr |
Parallax (π) | 9.63 ± 0.40 mas[1] |
Distance | 340 ± 10 ly (104 ± 4 pc) |
Absolute magnitude (MV) | +0.82[5] |
Details | |
Mass | 1.49[4] M☉ |
Radius | 14[6] R☉ |
Luminosity | 63[4] L☉ |
Temperature | 4,531±25[4] K |
Metallicity [Fe/H] | −0.04±0.05[5] dex |
Age | 3.58[4] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
At an age of about 3.58[4] billion years, Lambda2 Sculptoris is an evolved red-clump[9] giant star with a stellar classification of K0 III.[3] It is presently on the horizontal branch and is generating energy through the nuclear fusion of helium at its core. The star has an estimated 1.49[4] times the mass of the Sun and has expanded to about 14[6] times the Sun's radius. It is radiating 63[4] times the solar luminosity from its photosphere at an effective temperature of 4,531 K.[4]