KZ Andromedae
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Right ascension23h 09m 57.3642s[2]
Declination+35° 32′ 55.658″[2]
Apparentmagnitude(V)7.91 – 8.03 variable[3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 09m 57.3642s[2] |
| Declination | +35° 32′ 55.658″[2] |
| Apparent magnitude (V) | 7.91 – 8.03 variable[3] |
| Characteristics | |
| Spectral type | K2Ve+K2Ve[3] |
| Apparent magnitude (B) | 8.81[4] |
| Apparent magnitude (V) | 7.93[4] |
| Apparent magnitude (G) | 7.6580[2] |
| Apparent magnitude (J) | 6.225[5] |
| Apparent magnitude (H) | 5.778[5] |
| Apparent magnitude (K) | 5.659[5] |
| Variable type | BY Dra[3] |
| Astrometry | |
| Radial velocity (Rv) | −5.818±0.026[6] km/s |
| Proper motion (μ) | RA: 150.123±0.063 [2] mas/yr Dec.: 1.226±0.059[2] mas/yr |
| Parallax (π) | 32.8449±0.0369 mas[2] |
| Distance | 99.3 ± 0.1 ly (30.45 ± 0.03 pc) |
| Orbit[6] | |
| Period (P) | 3.03291126±0.00000046 days |
| Eccentricity (e) | 0.01174±0.00056 |
| Periastron epoch (T) | HJD 2455133.480±0.020 |
| Argument of periastron (ω) (secondary) | 7.11±2.35° |
| Semi-amplitude (K1) (primary) | 69.362±0.046 km/s |
| Semi-amplitude (K2) (secondary) | 71.300±0.054 km/s |
| Details[6] | |
| Primary | |
| Radius | 0.77±0.07 R☉ |
| Luminosity | 0.34±0.06 L☉ |
| Rotational velocity (v sin i) | 12.5 km/s |
| Secondary | |
| Radius | 0.66±0.06 R☉ |
| Luminosity | 0.25±0.04 L☉ |
| Rotational velocity (v sin i) | 12.2 km/s |
| Other designations | |
| 2E 4687, 2MASS J23095734+4757300, BD+47 4058, EUVE J2309+47.9, HD 218738, HIP 114379, GJ 4315, TYC 3627-1822-1, NLTT 2314, SAO 52753, WDS J23100+4758B | |
| Database references | |
| SIMBAD | data |
KZ Andromedae (often abbreviated to KZ And) is a double lined spectroscopic binary in the constellation Andromeda. Its apparent visual magnitude varies between 7.91 and 8.03 during a cycle slightly longer than 3 days.
