Lambda1 Fornacis - Misplaced Pages

Star in the constellation Fornax For other stars with this Bayer designation, see λ Fornacis.

Lambda Fornacis
Observation data Epoch J2000.0 Equinox J2000.0
Location of Lambda Fornacis (circled)
Constellation	Fornax
Right ascension	02 33 07.0259
Declination	−34° 38′ 59.882″
Apparent magnitude (V)	5.91
Characteristics
Evolutionary stage	Horizontal branch
Spectral type	K0/1III
U−B color index	+2.14
B−V color index	+1.06
Astrometry

Radial velocity (R_v)	+10.29±0.14 km/s
Proper motion (μ)	RA: −18.216±0.017 mas/yr Dec.: −18.058±0.026 mas/yr
Parallax (π)	8.5123 ± 0.0286 mas
Distance	383 ± 1 ly (117.5 ± 0.4 pc)
Absolute magnitude (M_V)	0.67

Details

Mass	2.32 `M`_☉
Radius	12.38 `R`_☉
Luminosity	66 `L`_☉
Surface gravity (log g)	2.32 cgs
Temperature	4,770 K
Metallicity	0.18±0.14 dex
Rotational velocity (v sin i)	2.00 km/s

Other designations
λ For, CD–35°877, GC 3067, HD 15975, HIP 11867, HR 744, SAO 193763, PPM 278055, GCRV 53183
Database references
SIMBAD	data

λ Fornacis, Latinized as Lambda Fornacis, is a red giant star in the southern constellation of Fornax. It is just visible to the naked eye as a dim, yellow-hued point of light with an apparent visual magnitude of 5.91. The star is located 383 light years from the Sun, based on stellar parallax, and is drifting further away with a radial velocity of +10 km/s.

λ Fornacis is a K-type giant star with a stellar classification of K0/1III, showing it has exhausted its core hydrogen and evolved away from the main sequence. It is currently on the horizontal branch, fusing helium in its core. The star has 2.3 times the mass of the Sun and 12 times its radius. It is radiating 66 times the luminosity of the Sun from its photosphere at an effective temperature of 4,770 K. The abundance of elements with mass higher than helium is similar to the Sun.

References

^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
^ Jones, M. I.; et al. (December 2011). "Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. I. Sample definition and physical properties". Astronomy & Astrophysics. 536: 7. arXiv:1110.6459. Bibcode:2011A&A...536A..71J. doi:10.1051/0004-6361/201117887. S2CID 55769003. A71.
Houk, N. (1982). "Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0". Michigan Catalogue of Two-dimensional Spectral Types for the HD stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0. Bibcode:1982mcts.book.....H.
^ Nicolet, B. (1975). "Catalogue of Measurements in the Cape UBV Photometry on Magnetic Tape". Astronomy and Astrophysics Supplement Series. 22: 239. Bibcode:1975A&AS...22..239N.
Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
"lam01 For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-16.

Bayer	α (Dalim) β γ γ δ ε ζ η η η ι ι κ λ λ μ ν π ρ σ τ υ φ χ χ χ ψ ω
Variable	R TZ UZ
HR	683 858
HD	15337 20781 20782 20868 (Intan)
Other	2MASS J02431371−2453298 HIP 13044 LP 944-20 UDF 2457 WASP-72 (Diya)

Exoplanets	HD 16417 b HD 20781 b c d e HD 20782 b HD 20868 b (Baiduri) TOI-849 b

Star clusters	NGC 1049

Nebulae	NGC 1360

NGC	823 824 922 986 1097 1210 1255 1288 1310 1316 1317 1318 1326 1350 1365 1374 1375 1379 1380 1381 1387 1398 1399 1406 1425 1427
Other	Fornax Dwarf HUDF-JD2 GS-NDG-9422 IC 335 IC 1993 JADES-GS-z14-0 JADES-GS-z7-01-QU MRC 0316-257 PGC 13809 UDF 423 UDFj-39546284 UDFy-38135539

Galaxy clusters	Fornax Cluster

Astronomical events	SN 1992bd SN 1999eu SN 2003B