CN Boötis
Location of CN Boötis (circled), seen in an optical image of Arcturus (bright star at center). | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 16m 04.13970s |
| Declination | +18° 54′ 42.4852″ |
| Apparent magnitude (V) | 5.96 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A8V |
| U−B color index | +0.05 |
| B−V color index | +0.26 |
| Variable type | δ Sct |
| Astrometry | |
| Radial velocity (Rv) | 4.69±0.18 km/s |
| Proper motion (μ) | RA: 40.288 mas/yr Dec.: -30.863 mas/yr |
| Parallax (π) | 21.6479±0.0332 mas |
| Distance | 150.7 ± 0.2 ly (46.19 ± 0.07 pc) |
| Details | |
| CN Boötis | |
| Mass | 1.552±0.122 M☉ |
| Radius | 1.603±0.108 R☉ |
| Luminosity | 6.80±0.197 L☉ |
| Surface gravity (log g) | 4.38 cgs |
| Temperature | 7388 K |
| Rotational velocity (v sin i) | 82 km/s |
| Other designations | |
| AG+19°1338, BD+19°2779, Gaia DR3 1233902704963092608, GC 19251, HD 124953, HR 5343, SAO 100949, PPM 130449, TIC 135169898, TYC 1472-1427-1, GSC 01472-01427, 2MASS J14160414+1854426 | |
| Database references | |
| SIMBAD | CN Boo |
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CN Boötis (HD 124953, HR 5343), or simply CN Boo, is a white-hued variable star in the northern constellation of Boötes. With an apparent magnitude of 5.957, it can be faintly seen from Earth by the naked eye, just south-southeast of the much brighter Arcturus. It is located at a distance of 150.7 light-years (46.2 parsecs) according to Gaia DR3 parallax measurements, and is receding at a radial velocity of 4.69±0.18 km/s. It is a member of the Ursa Major Stream, a group of stars with similar velocities that all formed around 300 million years ago.
It was given its variable star designation, CN Boötis, in 1981. Prior to that it was usually referred to as HR 5343 or HD 124953 in the literature.