Lambda Caeli

Lambda Caeli
Observation data
Epoch J2000      Equinox J2000
Constellation Caelum
Right ascension 04h 43m 44.27211s[1]
Declination −41° 03′ 53.2340″[1]
Apparent magnitude (V) 6.24[2]
Characteristics
Spectral type K3/4III[3]
U−B color index +1.78[4]
B−V color index +1.468±0.008[2]
Astrometry
Radial velocity (Rv)−4.3±0.4[5] km/s
Proper motion (μ) RA: +10.82[6] mas/yr
Dec.: +10.93[6] mas/yr
Parallax (π)4.6342 ± 0.0664 mas[1]
Distance700 ± 10 ly
(216 ± 3 pc)
Absolute magnitude (MV)−0.52[2]
Details
Radius31.43+2.36
−3.87
[1] R
Luminosity274±5[1] L
Temperature4,189+284
−149
[1] K
Other designations
λ Cae[7], CD−41°1549, HD 30202, HIP 21998, HR 1518, SAO 216961[8]
Database references
SIMBADdata

Lambda Caeli, Latinized from λ Caeli, is a star in the constellation Caelum. It is also known by its designations HD 30202 and HR 1518.[8] This star is a challenge to view with the naked eye, having an apparent visual magnitude of 6.24.[2] Based on parallax measurements, Lambda Caeli is known to be around 700 light-years distant from the Sun, but is drifting closer with a radial velocity of −4 km/s.[5]

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 cooled and expanded; now having 31 times the radius of the Sun. It is radiating 274 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,189 K.[1]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference EgUBV was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference HIP was invoked but never defined (see the help page).
  7. ^ Kostjuk, N. D. (2004). "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)". VizieR On-line Data Catalog: IV/27A. Originally Published in: Institute of Astronomy of Russian Academy of Sciences (2002). 4027. Bibcode:2004yCat.4027....0K.
  8. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).