Beta Lacertae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) |
|
|---|---|
| Constellation | Lacerta |
| Right ascension | 22h 23m 33.6235s |
| Declination | +52° 13′ 44.567″ |
| Apparent magnitude (V) | 4.43 |
| Characteristics | |
| Spectral type | G8.5IIIb |
| U−B color index | +0.77 |
| B−V color index | +1.02 |
| V−R color index | 0.6 |
| R−I color index | +0.57 |
| Astrometry | |
| Radial velocity (Rv) | −10.4 ± 0.9 km/s |
| Proper motion (μ) |
RA: −13.56 mas/yr Dec.: −186.37 mas/yr |
| Parallax (π) | 19.21 ± 0.51mas |
| Distance | 170 ± 5 ly (52 ± 1 pc) |
| Absolute magnitude (MV) | 0.85 |
| Details | |
| Radius | 10.7 ± 0.3 R☉ |
| Rotational velocity (v sin i) | < 17 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Beta Lacertae (Beta Lac, β Lacertae, β Lac) is the fourth-brightest star in the constellation of Lacerta. It is a G-type giant with an apparent visual magnitude of approximately 4.43.
In Chinese, 螣蛇 (Téng Shé), meaning Flying Serpent, refers to an asterism consisting of β Lacertae, α Lacertae, 4 Lacertae, π2 Cygni, π1 Cygni, HD 206267, ε Cephei, σ Cassiopeiae, ρ Cassiopeiae, τ Cassiopeiae, AR Cassiopeiae, 9 Lacertae, 3 Andromedae, 7 Andromedae, 8 Andromedae, λ Andromedae, κ Andromedae, ι Andromedae, and ψ Andromedae. Consequently, β Lacertae itself is known as 螣蛇十 (Téng Shé shí, English: the Tenth Star of Flying Serpent)
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