Lambda Lyrae
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 00m 00.82568s[1] |
| Declination | +32° 8′ 43.8527″[1] |
| Apparent magnitude (V) | 4.937[2] |
| Characteristics | |
| Spectral type | K2.5 II[3] |
| U−B color index | +1.609[2] |
| B−V color index | +1.455[2] |
| Astrometry | |
| Radial velocity (Rv) | -17.69 ± 0.02[4] km/s |
| Proper motion (μ) | RA: 6.08[1] mas/yr Dec.: 9.96[1] mas/yr |
| Parallax (π) | 2.95 ± 0.25[1] mas |
| Distance | 1,110 ± 90 ly (340 ± 30 pc) |
| Absolute magnitude (MV) | −3.75+0.65 −0.50[3] |
| Details | |
| Mass | 6.3 ± 0.8[5] M☉ |
| Radius | 120[6] R☉ |
| Luminosity | 2,228[7] L☉ |
| Surface gravity (log g) | 2.21[3] cgs |
| Temperature | 4,220[3] K |
| Metallicity [Fe/H] | −0.02[3] dex |
| Rotational velocity (v sin i) | 3.2±1.0[3] km/s |
| Age | 58.4 ± 22.6[5] Myr |
| Other designations | |
Lambda Lyrae (λ Lyr) is a 5th magnitude star in the constellation Lyra, approximately 1,100 light years away from Earth. It is an orange bright giant star of the spectral type K2.5II. It is much brighter and larger, yet cooler, than our Sun.[8] The star is about 6.3 solar masses in mass and has a diameter over a hundred times that of the sun's.
References
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