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57 Aquilae |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Aquila |
| Right ascension | 19h 54m 37.6524s |
| Declination | -08° 13′ 38.239″ |
| Apparent magnitude (V) | 5.71 |
| Characteristics | |
| Spectral type | B7Vn |
| U−B color index | -0.48 |
| B−V color index | -0.08 |
| Astrometry | |
| Radial velocity (Rv) | -6 km/s |
| Proper motion (μ) | RA: 8.11 mas/yr Dec.: -25.71 mas/yr |
| Parallax (π) | 9.74 ± 1.08 mas |
| Distance | approx. 330 ly (approx. 100 pc) |
| Absolute magnitude (MV) | 5.63 |
| Details | |
| Mass | 18 M☉ |
| Radius | 7 R☉ |
| Luminosity | 20,000 L☉ |
| Temperature | 10,000–30,000 K |
| Metallicity | ? |
| Rotation | 340 km/s 0,002857592388 Year |
| Age | ? years |
| Orbit | |
| Companion | 57 Aquilae B |
| Semimajor axis (a) | 36" |
| Inclination (i) | 170° |
| Other designations | |
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HD 188294, GC 27563, HR 7594, GCRV 12251, IDS 19492-0829, TYC 5725-3092-1, STF 2594B, 2MASS J19543806-0814133, UBV M 24263, ADS 13087, GSC 05725-03092, PPM 203425, UBV 16953, BD-08° 5155, HIC 97967, ROT 2875, uvby98 100188294, CCDM J19546-0814, HIP 97967, SAO 143899, HD 188293, GCRV 12250, 2MASS J19543765-0813382, N30 4403, UBV M 24262, HIC 97966, PLX 4698, UBV 16952, BD-08 5154, HIP 97966, PPM 203424, uvby98 100188293, HR 7593, ROT 2874, GC 27562, IDS 19492-0829, SAO 143898.
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| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) |
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57 Aquilae or IDS 19492-0829 A is a double star in the constellation Aquila. Its apparent magnitude is 5.28. The magnitude 6 components can already be resolved using a weak telescope.
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| IDS 19492-0829 B (HD 188294) | 19h 54m 38.0628s | -08° 14' 13.372 | 6.44 | B8V | Simbad |
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