| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h18m 32.49672s[1] |
| Declination | +01° 05′ 06.4941″[1] |
| Apparent magnitude (V) | 5.10[2] |
| Characteristics | |
| Spectral type | K1 II/III[3] |
| U−B color index | +1.01[2] |
| B−V color index | +1.15[2] |
| Astrometry | |
| Radial velocity (Rv) | −23.13±0.19[4] km/s |
| Proper motion (μ) | RA: +11.242[1] mas/yr Dec.: +15.753[1] mas/yr |
| Parallax (π) | 8.0976 ± 0.3042 mas |
| Distance | 400 ± 20 ly (123 ± 5 pc) |
| Absolute magnitude (MV) | +0.7[5] |
| Details | |
| Radius | 19.04+0.41 −0.17[1] R☉ |
| Luminosity | 164.789±6.995[1] L☉ |
| Temperature | 4,740+153 −51[1] K |
| Rotational velocity (v sin i) | 10[6] km/s |
| Other designations | |
23 Aql, BD+00°4168, HD 180972, HIP 94885, HR 7319, SAO 124487[7] | |
| Database references | |
| SIMBAD | data |
23 Aquilae is a binary star[8] system in the equatorial constellationofAquila. 23 Aquilae is its Flamsteed designation. It is at a distance of about 400 light-years (120 parsecs) with an apparent visual magnitude of 5.10,[2] which is bright enough to be faintly visible to the naked eye as an orange-hued star. The brightness of the star is diminished by 0.21 in magnitude because of extinction from interstellar dust and gas.[4] The system is moving closer to the Earth with a heliocentric radial velocity of –23 km/s.[4]
The primary component of this system is a magnitude 5.31 K-type giant starorbright giant with a stellar classification of K1.[9] The star is radiating 165 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 4,740 K.[1] Orbiting at an angular separation of 3.25 arcseconds is a magnitude 8.76 companion star.[8]
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