Lambda2 Sculptoris

For other star systems with this Bayer designation, see λ Sculptoris.

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.^[9]

Lambda² Sculptoris

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
Evolutionary stage	red clump[3]
Spectral type	K1 III[4]
B−V color index	+1.15[2]
Astrometry
Radial velocity (Rv)	+26.5[5] 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[6]
Details
Mass	1.49[5] M☉
Radius	14[7] R☉
Luminosity	63[5] L☉
Temperature	4,531±25[5] K
Metallicity [Fe/H]	−0.04±0.05[6] dex
Age	3.58[5] Gyr
Other designations
λ2 Scl, CD−39°181, FK5 26, HD 4211, HIP 3456, HR 195, SAO 192703[8]
Database references
SIMBAD	data

At an age of about 3.58^[5] billion years, Lambda² Sculptoris is an evolved red-clump^[3] giant star with a stellar classification of K0 III.^[4] 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^[5] times the mass of the Sun and has expanded to about 14^[7] times the Sun's radius. It is radiating 63^[5] times the solar luminosity from its photosphere at an effective temperature of 4,531 K.^[5]