CN Andromedae
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Right ascension00h 20m 30.54209s[2]
Declination+40° 13′ 33.80342″[2]
Apparentmagnitude(V)9.62 – 10.21 variable [3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 00h 20m 30.54209s[2] |
| Declination | +40° 13′ 33.80342″[2] |
| Apparent magnitude (V) | 9.62 – 10.21 variable [3] |
| Characteristics | |
| Spectral type | F5V[3] |
| Apparent magnitude (B) | 10.24[4] |
| Apparent magnitude (V) | 9.706[4] |
| Apparent magnitude (G) | 9.6637[2] |
| Apparent magnitude (J) | 8.670[5] |
| Apparent magnitude (H) | 8.452[5] |
| Apparent magnitude (K) | 8.427[5] |
| B−V color index | 0.49725[4] |
| Variable type | EB[3] |
| Astrometry | |
| Radial velocity (Rv) | −24.2±1.0[6] km/s |
| Proper motion (μ) | RA: −8.549±0.054 [2] mas/yr Dec.: −35.291±0.024[2] mas/yr |
| Parallax (π) | 4.9670±0.0425 mas[2] |
| Distance | 657 ± 6 ly (201 ± 2 pc) |
| Orbit[6] | |
| Period (P) | 0.4627952±0.000035 days |
| Semi-major axis (a) | 3.066±0.035 |
| Inclination (i) | 68.51±0.17° |
| Periastron epoch (T) | HJD 2445231.51710±0.00059 |
| Details | |
| Primary | |
| Mass | 1.433±0.030[7] M☉ |
| Radius | 1.48±0.03[7] R☉ |
| Luminosity | 3.40[7] L☉ |
| Surface gravity (log g) | 4.24[6] cgs |
| Temperature | 6,450[7] K |
| Secondary | |
| Mass | 0.552±0.020[7] M☉ |
| Radius | 0.95[7] R☉ |
| Luminosity | 0.40[7] L☉ |
| Surface gravity (log g) | 4.22[6] cgs |
| Temperature | 4,726[7] K |
| Other designations | |
| 2MASS J00203054+4013337, BD+39 59, TYC 2787-1815-1 | |
| Database references | |
| SIMBAD | data |
CN Andromedae (CN And) is an eclipsing binary star in the constellation Andromeda. Its maximum apparent visual magnitude is 9.62 and drops down to a minimum of 10.2 during the main eclipse. It is classified as a Beta Lyrae variable with a period roughly of 0.4628 days.[3]
