56 Aquilae
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56 Aquilae |
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| Observation data Epoch J2000 Equinox J2000 |
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|---|---|
| Constellation | Aquila |
| Right ascension | 19h 54m 08.2772s |
| Declination | -08° 34′ 27.16″ |
| Apparent magnitude (V) | 5.79 |
| Characteristics | |
| Spectral type | K5III |
| U−B color index | 1.64 |
| B−V color index | 2.0 |
| Astrometry | |
| Radial velocity (Rv) | -49.5 km/s |
| Proper motion (μ) | RA: 7.87 mas/yr Dec.: -18.97 mas/yr |
| Parallax (π) | 8.27 ± 1.06 mas |
| Distance | approx. 390 ly (approx. 120 pc) |
| Absolute magnitude (MV) | 7.465 |
| Details | |
| Mass | 3–4 M☉ |
| Radius | 130 R☉ |
| Luminosity | 1,900 L☉ |
| Temperature | 3,350 K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Orbit | |
| Companion | 56 Aquilae B |
| Semimajor axis (a) | 48.5" |
| Inclination (i) | 77° |
| Other designations | |
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IDS 19487-0850 A, BD-08° 5150, GSC 05725-02836, IRAS 19514-0842, TYC 5725-2836-1, BDS 9697 A, HD 188154, IRC -10526, UBV M 24247, CCDM J19541-0834A, HERZ 2354, 2MASS J19540828-0834272, UBV 16934, CSI-08 5150 1, HIC 97928, PPM 203417, YZ 98 6968, GC 27546, HIP 97928, RAFGL 5441S, GCRV 12240, HR 7584, SAO 143894.
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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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56 Aquilae is a star in the constellation Aquila. Its apparent magnitude is 5.76, meaning it would be barely visible to the naked eye, under ideal conditions. It was discovered by nineteenth Century Astronomer John Herschel.
The 56 Aquilae system is a double star system.[1] It is one of the double stars profiled in Admiral William Henry Smyth's 1864 work, “Sidereal Chromatics”.
[edit] References
- ^ Andrew James. "The application of Admiral Smyth's “Sidereal Chromatics”". http://homepage.mac.com/andjames/Page029j0.htm. Retrieved 2007-12-22.
[edit] External links
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| IDS 19487-0850 B (BD-08 5150B) | 19h 54m 11.1s | -08° 34' 14 | 12.32 | Simbad |
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