  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 18m 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 | |
| Database references | |
| SIMBAD | data |
23 Aquilae is a binary star [8] system in the equatorial constellation of Aquila. 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 star or bright 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]
- ^ a b c d e f g h Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode: 1978A&AS...34....1N.
- ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 05: 0. Bibcode: 1999MSS...C05....0H.
- ^ a b c Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430 (1): 165–186, arXiv: astro-ph/0409579, Bibcode: 2005A&A...430..165F, doi: 10.1051/0004-6361:20041272, S2CID 17804304.
- ^ Wilson, O. C. (1976). "Absolute magnitudes of stars from widths of chromospheric Ca II emission lines". Astrophysical Journal. 205: 823. Bibcode: 1976ApJ...205..823W. doi: 10.1086/154338.
- ^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1): 1, Bibcode: 1970CoAsi.239....1B.
- ^ "* 23 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-25.
- ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin, 51: 79, Bibcode: 1962RGOB...51...79E.
| |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Aquila |
| Right ascension | 19h 18m 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 | |
| Database references | |
| SIMBAD | data |
23 Aquilae is a binary star [8] system in the equatorial constellation of Aquila. 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 star or bright 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]
- ^ a b c d e f g h Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv: 1804.09365. Bibcode: 2018A&A...616A...1G. doi: 10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- ^ a b c d Nicolet, B. (1978), "Photoelectric photometric Catalogue of homogeneous measurements in the UBV System", Astronomy and Astrophysics Supplement Series, 34: 1–49, Bibcode: 1978A&AS...34....1N.
- ^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 05: 0. Bibcode: 1999MSS...C05....0H.
- ^ a b c Famaey, B.; et al. (January 2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430 (1): 165–186, arXiv: astro-ph/0409579, Bibcode: 2005A&A...430..165F, doi: 10.1051/0004-6361:20041272, S2CID 17804304.
- ^ Wilson, O. C. (1976). "Absolute magnitudes of stars from widths of chromospheric Ca II emission lines". Astrophysical Journal. 205: 823. Bibcode: 1976ApJ...205..823W. doi: 10.1086/154338.
- ^ Bernacca, P. L.; Perinotto, M. (1970), "A catalogue of stellar rotational velocities", Contributi Osservatorio Astronomico di Padova in Asiago, 239 (1): 1, Bibcode: 1970CoAsi.239....1B.
- ^ "* 23 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2012-07-25.
- ^ a b Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv: 0806.2878, Bibcode: 2008MNRAS.389..869E, doi: 10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ^ Eggen, O. J. (1962), "Space-velocity vectors for 3483 stars with proper motion and radial velocity", Royal Observatory Bulletin, 51: 79, Bibcode: 1962RGOB...51...79E.