BX Andromedae
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Right ascension02h 09m 03.4213s[2]
Declination+40° 47′ 39.167″[2]
Apparentmagnitude(V)8.87 – 9.53 variable [3]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 02h 09m 03.4213s[2] |
| Declination | +40° 47′ 39.167″[2] |
| Apparent magnitude (V) | 8.87 – 9.53 variable [3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F2V[3] |
| Apparent magnitude (B) | 9.37[4] |
| Apparent magnitude (V) | 8.98[4] |
| Apparent magnitude (G) | 8.873359[2] |
| Apparent magnitude (J) | 8.487[5] |
| Apparent magnitude (H) | 8.229[5] |
| Apparent magnitude (K) | 8.134[5] |
| B−V color index | 0.3927[6] |
| Variable type | EB[3] |
| Astrometry | |
| Radial velocity (Rv) | −45.10±2.6[7] km/s |
| Proper motion (μ) | RA: 9.846(23) mas/yr[2] Dec.: −8.425(24) mas/yr[2] |
| Parallax (π) | 5.5643±0.0216 mas[2] |
| Distance | 586 ± 2 ly (179.7 ± 0.7 pc) |
| Orbit[8] | |
| Period (P) | 0.61011240 days |
| Semi-major axis (a) | 4.424 R☉ |
| Inclination (i) | 75.862° |
| Semi-amplitude (K1) (primary) | 106.35±0.61 km/s |
| Semi-amplitude (K2) (secondary) | 233.58±1.77 km/s |
| Details[8] | |
| Primary | |
| Mass | 2.148 M☉ |
| Radius | 2.01 R☉ |
| Luminosity | 7.08 L☉ |
| Temperature | 6,650 K |
| Secondary | |
| Mass | 0.977 M☉ |
| Radius | 1.40 R☉ |
| Luminosity | 0.90 L☉ |
| Temperature | 4,758 K |
| Other designations | |
| 2MASS J02090342+4047392, BD+40 442, HD 13078, HIP 10027, SAO 37805, TYC 2833-1436-1 | |
| Database references | |
| SIMBAD | data |
BX Andromedae (BX And) is an eclipsing binary star in the constellation Andromeda. Its maximum apparent visual magnitude is 8.87. Within a cycle of approximately 14.6 hours, the brightness drops down to a magnitude of 9.53 during the main eclipse, and to a magnitude of 9.12 during the secondary one. It is classified as a Beta Lyrae variable.[3]
