R Lyrae
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Not to be confused with RR Lyrae.
| Observation data Epoch J2000.0 Equinox J2000.0 |
|
|---|---|
| Constellation | Lyra |
| Right ascension | 18h 55m 20.1013s |
| Declination | +43° 56' 45.919" |
| Apparent magnitude (V) | 4.20 |
| Characteristics | |
| Spectral type | M5III |
| U−B color index | +1.41 |
| B−V color index | +1.59 |
| Astrometry | |
| Radial velocity (Rv) | -28.3 km/s |
| Proper motion (μ) | RA: 19.94 mas/yr Dec.: 80.60 mas/yr |
| Parallax (π) | 9.33 ± 0.52 mas |
| Distance | 350 ± 20 ly (107 ± 6 pc) |
| Other designations | |
R Lyrae is a 4th magnitude star in the constellation Lyra, approximately 350 light years away from Earth. It is a red giant star of the spectral type M5III, meaning it has a surface temperature of under 3,500 kelvins. It is much larger and brighter, yet cooler, than our Sun. It is a semiregular pulsating star.[1]
[edit] References
- ^ a b "Simbad Query Result". Simbad. http://simbad.u-strasbg.fr/simbad/sim-id?protocol=html&Ident=*+13+Lyr&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id. Retrieved October 16, 2007.
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