Lambda Pictoris
λ Pictoris, Latinised as Lambda Pictoris, is a solitary, orange-hued star in the southern constellation of Pictor. It is visible to the naked eye, having an apparent visual magnitude of +5.29. With an annual parallax shift of 8.71 mas as seen from the Earth, it is located around 374 light-years from the Sun. At the estimated age of 2.24 billion years old, it is an evolved K-type giant star with a stellar classification of K0/1 III. 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.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pictor |
| Right ascension | 04h 42m 46.42350s |
| Declination | −50° 28′ 52.8050″ |
| Apparent magnitude (V) | +5.29 |
| Characteristics | |
| Spectral type | K0/1 III |
| U−B color index | +0.74 |
| B−V color index | +0.98 |
| Astrometry | |
| Radial velocity (Rv) | +4.60 km/s |
| Proper motion (μ) | RA: −36.02 mas/yr Dec.: mas/yr |
| Parallax (π) | 8.71 ± 0.18 mas |
| Distance | 374 ± 8 ly (115 ± 2 pc) |
| Details | |
| Mass | 2.20 M☉ |
| Luminosity | 112 L☉ |
| Surface gravity (log g) | 2.77±0.09 cgs |
| Temperature | 4,851±45 K |
| Metallicity [Fe/H] | −0.13±0.03 dex |
| Age | 2.24 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.