Lambda Pictoris
Appearance
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
---|---|
Constellation | Pictor |
Right ascension | 04h 42m 46.42350s[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 mas[1] |
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 | |
Database references | |
SIMBAD | data |
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]
References
- ^ a b c d e 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.
- ^ a b c d 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.
- ^ a b Houk, Nancy (1978), "Michigan catalogue of two-dimensional spectral types for the HD stars", Ann Arbor : Dept. of Astronomy, 2, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ a b c d e f g 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.
- ^ a b 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.
{{citation}}
: CS1 maint: unflagged free DOI (link) - ^ "lam Pic". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-21.
{{cite web}}
: CS1 maint: postscript (link) - ^ 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.
{{citation}}
: CS1 maint: unflagged free DOI (link)