Lambda Caeli

Lambda Caeli is a star in the southern constellation of Caelum. Its name is a Bayer designation that is Latinized from λ Caeli, and abbreviated Lambda Cae or λ Cae;^[6] it is also known by its designations HD 30202 and HR 1518.^[7] This star is a challenge to view with the naked eye, having an apparent visual magnitude of 6.24.^[1] Based on parallax measurements, Lambda Caeli is known to be around 700 light-years (210 pc) distant from the Sun, but it is drifting closer with a radial velocity of −4 km/s.^[5]

Lambda Caeli

Observation data Epoch J2000      Equinox J2000
Constellation	Caelum[1]
Right ascension	04h 43m 44.272s[2]
Declination	−41° 03′ 53.23″[2]
Apparent magnitude (V)	6.24[1]
Characteristics
Spectral type	K3/4III[3]
U−B color index	+1.78[4]
B−V color index	+1.468±0.008[1]
Astrometry
Radial velocity (Rv)	−4.3±0.4[5] km/s
Proper motion (μ)	RA: +10.950 mas/yr[2] Dec.: +11.040 mas/yr[2]
Parallax (π)	4.4581±0.0265 mas[2]
Distance	732 ± 4 ly (224 ± 1 pc)
Absolute magnitude (MV)	−0.52[1]
Details
Mass	4.20+0.11 −0.39[2] M☉
Radius	33.0±0.7[2] R☉
Luminosity	408.6+5.5 −4.5[2] L☉
Surface gravity (log g)	4.47+0.10 −0.04[2] cgs
Temperature	4,118+128 −71[2] K
Other designations
λ Cae[6], CD−41°1549, GC 5775, HD 30202, HIP 21998, HR 1518, SAO 216961[7]
Database references
SIMBAD	data

This object is an aging K-type giant star with a stellar classification of K3/4III.^[3] Having exhausted the supply of hydrogen at its core, it has expanded and cooled; now having 31 times the radius of the Sun. With 4.2 times the mass of the Sun, it is radiating 409 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,118 K.^[2]