| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 20h07m 50.36773s[1] |
| Declination | +09° 23′ 59.4022″[1] |
| Apparent magnitude (V) | 6.443[2] |
| Characteristics | |
| Spectral type | F3V[3] |
| U−B color index | -0.033[2] |
| B−V color index | +0.472[2] |
| Astrometry | |
| Radial velocity (Rv) | −27[4] km/s |
| Proper motion (μ) | RA: +46.75[1] mas/yr Dec.: +28.81[1] mas/yr |
| Parallax (π) | 25.40 ± 1.00 mas[1] |
| Distance | 128 ± 5 ly (39 ± 2 pc) |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 191104 is a star system in the equatorial constellationofAquila. Two of the components form a close spectroscopic binary system, while a third star, also thought to be a spectroscopic binary,[5] orbits the pair at a greater distance.[6]
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 | This binary or multiple star system–related article is a stub. You can help Wikipedia by expanding it. |
