21 Aquilae
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| Observation data Epoch J2000 |
|
|---|---|
| Constellation (pronunciation) |
Aquila |
| Right ascension | 19h 13m 42.7029s |
| Declination | +02° 17′ 37.347″ |
| Apparent magnitude (V) | 5.137 |
| Characteristics | |
| Spectral type | B8II-III |
| U-B color index | -0.41 |
| B-V color index | -0.07 |
| Variable type | Alpha CVn-type variable |
| Astrometry | |
| Radial velocity (Rv) | -5.2 km/s |
| Proper motion (μ) | RA: 5.78 mas/yr Dec.: -2.58 mas/yr |
| Parallax (π) | 5.09 ± 0.86 mas |
| Distance | approx. 600 ly (approx. 200 pc) |
| Absolute magnitude (MV) | 5.067 |
| Details | |
| Mass | ? M☉ |
| Radius | ? R☉ |
| Luminosity | ? L☉ |
| Temperature | ? K |
| Metallicity | ? |
| Rotation | ? |
| Age | ? years |
| Visual binary orbit | |
| Companion | 21 Aquilae B |
| Semimajor axis (a) | 36.2" |
| Inclination (i) | 287° |
| Other designations | |
|
V* V1288 Aql, FK5 3537, HIP 94477, SAO 124408, 21 Aql, GC 26490, HR 7287, ADS 12182 A, GCRV 11678, IDS 19087+0207 A, TD1 24179, AG+02° 2398, 2MASS J19134270+0217372, TYC 467-4986-1, BD+02° 3824, GSC 00467-04986, N30 4255, UBV M 23583, CCDM J19137+0218A, HD 179761, PLX 4478, UBV 16278, CSI+02 3824 1, HGAM 738, PPM 167421, uvby98 100179761 V, CSV 8128, HIC 94477, ROT 2744, YZ 2 6593.
|
|
| Database references | |
| SIMBAD | data |
| Database references | |
| SIMBAD | data |
21 Aquilae is a star in the constellation Aquila. Its apparent magnitude is 5.14.
[edit] Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| 21 Aquilae B (BD+02 3824B) | 19h 13m 40.3s | +02° 17' 47 | 12.3 | Simbad |
[edit] Reference
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