| |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Dorado |
| Right ascension | 05h26m 19.26577s[1] |
| Declination | −58° 54′ 45.06402″[1] |
| Apparent magnitude (V) | 5.13±0.01[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[3] |
| Spectral type | G6 III[4] or G8 III[5] |
| B−V color index | +1.00[6] |
| Astrometry | |
| Radial velocity (Rv) | 10±0.07[7] km/s |
| Proper motion (μ) | RA: −9.792 mas/yr[1] Dec.: +33.350 mas/yr[1] |
| Parallax (π) | 5.9209 ± 0.0712 mas[1] |
| Distance | 551 ± 7 ly (169 ± 2 pc) |
| Absolute magnitude (MV) | −0.6[8] |
| Details[9] | |
| Mass | 3.82±0.16 M☉ |
| Radius | 21.1±0.5 R☉ |
| Luminosity | 252±9 L☉ |
| Surface gravity (log g) | 2.41±0.12 cgs |
| Temperature | 5,009±43 K |
| Metallicity [Fe/H] | −0.06±0.04 dex |
| Rotational velocity (v sin i) | 5.2±1[10] km/s |
| Age | 258[11] Myr |
| Other designations | |
λ Dor, 23 G. Doradus[12], CPD−59°472, FK5 2410, GC 6749, HD 36189, HIP 25429, HR 1836, SAO 233981[13] | |
| Database references | |
| SIMBAD | data |
Lambda Doradus (Lambda Dor), Latinized from λ Doradus, is a solitary[14] yellow hued star located in the southern constellation Dorado. It has an apparent magnitude of 5.13,[2] making it faintly visible to the naked eye if viewed under ideal conditions. Parallax measurements place the star at a distance of 551 light years,[1] and it is currently receding with a heliocentric radial velocityof10 km/s.[7]
Lambda Dor has a stellar classification of either G6[4] or G8 III,[5] depending on the source. Nevertheless, both indicate that it is a red giant, and it is currently on the red giant branch fusing hydrogen in a shell outside a helium core.[3] At present it has 3.82 times the mass of the Sun[9] and at an age of 258 million years, it has expanded to a radius of 21.2 R☉.[9] It radiates at over 250 times the luminosity of the Sun from its photosphere at an effective temperatureof5,009 K.[9] Lambda Dor is slightly metal deficient, with an iron abundance 12% below solar levels.[9] It currently spins with a projected rotational velocityof5.2 km/s.[10]
