18 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 06m 58.6032s |
| Declination | +11° 04′ 16.423″ |
| Apparent magnitude (V) | 5.072 |
| Characteristics | |
| Spectral type | B8III |
| U−B color index | -0.39 |
| B−V color index | -0.07 |
| Variable type | Ellipsoidal Variable |
| Astrometry | |
| Radial velocity (Rv) | -18.6 km/s |
| Proper motion (μ) | RA: -0.27 mas/yr Dec.: -31.47 mas/yr |
| Parallax (π) | 6.43 ± 0.79 mas |
| Distance | approx. 510 ly (approx. 160 pc) |
| Absolute magnitude (MV) | 5.018 |
| Details | |
| Mass | 18 M☉ |
| Radius | 7 R☉ |
| Luminosity | 20,000 L☉ |
| Temperature | 10,000–30,000 K |
| Metallicity | ? |
| Rotation | 57 Km/s 0,00356542 Year |
| Age | ? years |
| Orbit | |
| Companion | 18 Aquilae B |
| Period (P) | 0.0035655 yr |
| Eccentricity (e) | 0.494 |
| Other designations | |
Y Aquilae, GCRV 11569, PLX 4443.1, TYC 1044-1453-1, 18 Aql, PMC 90-93 1420, UBV M 23507, HEI 568, GSC 01044-01453, PPM 135805, UBV 21326, HEI 568AB, HD 178125, ROT 2724, uvby98 100178125 V, AG+10° 2356, HIC 93867, SAO 104488, YZ 10° 7042, BD+10° 3787, HIP 93867, SBC7 729, p. WDS J19070+1104, FK5 3525, HR 7248, GC 26315, 2MASS J19065859+1104164, TD1 23928. | |
| Database references | |
| SIMBAD | data |
18 Aquilae or Y Aquilae is a star in the constellation Aquila. Its apparent magnitude is 5.07.
Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| 18 Aquilae B (PLX 4443) | 19h 07m 02.042s | +07° 36' 57.156 | 9.22 | K5V | Simbad |
References
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