Lambda2 Sculptoris
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Sculptor |
| Right ascension | 00h 44m 12.09903s[1] |
| Declination | −38° 25′ 18.0542″[1] |
| Apparent magnitude (V) | +5.90[2] |
| Characteristics | |
| Evolutionary stage | Horizontal branch[3] |
| Spectral type | K1 III[4] |
| B−V color index | +1.15[2] |
| Astrometry | |
| Radial velocity (Rv) | +28.22±0.13[1] km/s |
| Proper motion (μ) | RA: +245.567 mas/yr[1] Dec.: +119.038 mas/yr[1] |
| Parallax (π) | 9.8530±0.0458 mas[1] |
| Distance | 331 ± 2 ly (101.5 ± 0.5 pc) |
| Absolute magnitude (MV) | +0.82[5] |
| Details[6] | |
| Mass | 1.26±0.09 or 1.12±0.06[3] M☉ |
| Radius | 12.01±0.14 R☉ |
| Luminosity | 56.7±1.4 L☉ |
| Surface gravity (log g) | 2.34±0.10 cgs |
| Temperature | 4,572±35 K |
| Metallicity [Fe/H] | +0.01±0.08 dex |
| Age | 4.64±1.01 or 6.50±1.22[3] Gyr |
| Other designations | |
| λ2 Scl, CD−39°181, FK5 26, HD 4211, HIP 3456, HR 195, SAO 192703[7] | |
| Database references | |
| SIMBAD | data |
Lambda2 Sculptoris is an orange-hued star in the southern constellation of Sculptor. On dark nights it is faintly visible to the naked eye, having an apparent visual magnitude of +5.90.[2] Based upon an annual parallax shift of 9.63 mas as measured from Earth, it is located at a distance of 331 light-years.[1] It has a relatively large proper motion, advancing 0.273 arcsecond per year across the sky.[1]
The spectrum of this star matches a spectral class of K1III,[4] with the luminosity class III indicating it is a giant star that has exhausted the hydrogen at its core. It is now fusing helium, being in the evolutionary stage known as the horizontal branch.[3] Estimates of its mass and age give two different values: 1.12 or 1.26 solar masses and 4.64 or 6.50 billion years.[3] It has expanded to 12.01 times the Sun's radius and radiates 56.7 times the solar luminosity from its photosphere at an effective temperature of 4,572 K.[6]
References
[edit | edit source]- ^ a b c d e f g Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Gaia DR3 record for this source at VizieR.
- ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b c d e Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ a b Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value). Lam2 Scl's database entry at VizieR.
- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
