Lambda Pictoris

λ Pictoris, Latinised as Lambda Pictoris, is a solitary,[7] orange-hued star in the southern constellation of Pictor. It is visible to the naked eye, having an apparent visual magnitude of +5.29.[2] With an annual parallax shift of 8.71[1] mas as seen from the Earth, it is located around 374 light years from the Sun. At the estimated age of 2.24[4] billion years old, it is an evolved K-type giant star with a stellar classification of K0/1 III.[3] Lambda Pictoris has 2.2 times the mass of the Sun and is radiating 112 times the Sun's luminosity from its photosphere at an effective temperature of 4,581 K.[4]

Lambda Pictoris

Observation data Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation	Pictor
Right ascension	04^h 42^m 46.42350^s[1]
Declination	−50° 28′ 52.8050″[1]
Apparent magnitude (V)	+5.29[2]
Characteristics
Spectral type	K0/1 III[3]
U−B color index	+0.74[2]
B−V color index	+0.98[2]
Astrometry
Radial velocity (Rv)	+4.60[4] km/s
Proper motion (μ)	RA: −36.02[1] mas/yr Dec.:  mas/yr
Parallax (π)	8.71 ± 0.18[1] mas
Distance	374 ± 8 ly (115 ± 2 pc)
Details
Mass	2.20[4] M☉
Luminosity	112[4] L☉
Surface gravity (log g)	2.77±0.09[5] cgs
Temperature	4,851±45[4] K
Metallicity [Fe/H]	−0.13±0.03[5] dex
Age	2.24[4] Gyr
Other designations
λ Pic, CD−50° 1471, FK5 2351, HD 30185, HIP 21914, HR 1516, SAO 233638[6]
Database references
SIMBAD	data

References

1. van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357.
2. Cousins, A. W. J.; et al. (1969), "Comparison Stars for Long Period Variables", Monthly Notes of the Astronomical Society of Southern Africa, 28: 63, Bibcode:1969MNSSA..28...63C.
3. Houk, Nancy (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", Ann Arbor : Dept. Of Astronomy, Ann Arbor: Dept. of Astronomy, University of Michigan, 2, Bibcode:1978mcts.book.....H.
4. Luck, R. Earle (2015), "Abundances in the Local Region. I. G and K Giants", Astronomical Journal, 150 (3): 88, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88.
5. Alves, S.; et al. (April 2015), "Determination of the spectroscopic stellar parameters for 257 field giant stars", Monthly Notices of the Royal Astronomical Society, 448 (3): 2749–2765, arXiv:1503.02556, Bibcode:2015MNRAS.448.2749A, doi:10.1093/mnras/stv189.
6. "lam Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-21.
7. Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x.