Kappa Lyrae
From Infogalactic: the planetary knowledge core
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 19m 51.70908s[1] |
| Declination | +36° 03′ 52.3691″[1] |
| Apparent magnitude (V) | 4.35[2] |
| Characteristics | |
| Spectral type | K2 III[3] |
| U−B color index | +1.17[2] |
| B−V color index | +1.14[2] |
| Astrometry | |
| Radial velocity (Rv) | -24.36[4] km/s |
| Proper motion (μ) | RA: -16.75[1] mas/yr Dec.: +41.09[1] mas/yr |
| Parallax (π) | 13.71 ± 0.56[1] mas |
| Distance | 238 ± 10 ly (73 ± 3 pc) |
| Details | |
| Radius | 16[5] R☉ |
| Luminosity | 127.4[6] L☉ |
| Surface gravity (log g) | 2.51[7] cgs |
| Temperature | 4,638[7] K |
| Metallicity [Fe/H] | +0.13[7] dex |
| Rotational velocity (v sin i) | 5.0[4] km/s |
| Other designations | |
Kappa Lyrae (κ Lyr) is a solitary 4th magnitude star approximately 238 light years away from Earth, in the northern constellation of Lyra. It is a giant star of the spectral type K2III[3] with an effective temperature of 4,638[7] kelvins. It is cooler, yet larger and brighter, than our Sun. It is also a suspected small amplitude variable star.[9]
References
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