π Sculptoris, Latinized as Pi Sculptoris, is candidate astrometric binary[8] star system in the southern constellation Sculptor, positioned near the eastern constellation border with Fornax. It has an orange hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.25.[2] Based upon parallax measurements, the system is located at a distance of 66 light years from the Sun, and is drifting further away with a radial velocity of +14 km/s.[1]

Pi Sculptoris

Location of π Sculptoris (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Sculptor
Right ascension	01h 42m 08.62230s[1]
Declination	−32° 19′ 37.2862″[1]
Apparent magnitude (V)	5.25[2]
Characteristics
Evolutionary stage	horizontal branch[3]
Spectral type	K1II/III[4]
U−B color index	+0.79[5]
B−V color index	+1.05[5]
Astrometry
Radial velocity (Rv)	+13.83±0.15[1] km/s
Proper motion (μ)	RA: −76.714[1] mas/yr Dec.: +4.521[1] mas/yr
Parallax (π)	15.0534 ± 0.1667 mas[1]
Distance	217 ± 2 ly (66.4 ± 0.7 pc)
Absolute magnitude (MV)	1.16[2]
Details
Mass	1.52[3] M☉
Radius	9.28+0.30 −2.31[1] R☉
Luminosity	41.173±0.53[1] L☉
Surface gravity (log g)	2.69[3] cgs
Temperature	4,800+737 −75[1] K
Metallicity [Fe/H]	−0.22[3] dex
Rotational velocity (v sin i)	< 1.6[6] km/s
Other designations
π Scl, CPD−32°4292, FK5 1048, GC 2085, HD 10537, HIP 7955, HR 497, SAO 193263, GSC 07003-02207[7]
Database references
SIMBAD	data

The visible component is an aging giant/bright giant star with a stellar classification of K1II/III.[4] It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through core helium fusion.[3] The star has 1.5[3] times the mass of the Sun and 9.3[1] times the Sun's radius. It is radiating 41[1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,800 K.[1]

References