Lambda Lyrae
From Wikipedia, the free encyclopedia
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 0m 0.8257s |
| Declination | +32° 8′ 43.851″ |
| Apparent magnitude (V) | 4.951 |
| Characteristics | |
| Spectral type | K2.5 II[1] |
| U−B color index | +1.67 |
| B−V color index | +1.47 |
| Astrometry | |
| Radial velocity (Rv) | -15.5 km/s |
| Proper motion (μ) | RA: 6.13 mas/yr Dec.: 9.75 mas/yr |
| Parallax (π) | 2.12 ± 0.55 mas |
| Distance | approx. 1,500 ly (approx. 500 pc) |
| Absolute magnitude (MV) | –3.75+0.65 −0.50[1] |
| Details | |
| Surface gravity (log g) | 2.21[1] cgs |
| Temperature | 4,220[1] K |
| Metallicity [Fe/H] | −0.02[1] dex |
| Rotational velocity (v sin i) | 3.2 ± 1.0[1] km/s |
| Other designations | |
Lambda Lyrae (λ Lyr) is a 5th magnitude star in the constellation Lyra, approximately 1,500 light years away from Earth. It is an orange giant star of the spectral type K2.5II. It is much brighter and larger, yet cooler, than our Sun.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Carney, Bruce W. et al. (March 2008), "Rotation and Macroturbulence in Metal-Poor Field Red Giant and Red Horizontal Branch Stars", The Astronomical Journal 135 (3): 892–906, arXiv:0711.4984, Bibcode:2008AJ....135..892C, doi:10.1088/0004-6256/135/3/892
- ↑ 2.0 2.1 "Simbad Query Result". Simbad. Retrieved October 15, 2007.
| ||||||||||||||||||||||||||
This article is issued from Wikipedia. The text is available under the Creative Commons Attribution/Share Alike; additional terms may apply for the media files.