Astronomy:46 Aquilae
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Short description: Star in the constellation Aquila
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Aquila[1] |
| Right ascension | 19h 42m 12.81234s[2] |
| Declination | +12° 11′ 35.7407″[2] |
| Apparent magnitude (V) | 6.33[1] |
| Characteristics | |
| Spectral type | B9III[3] |
| U−B color index | −0.42[4] |
| B−V color index | −0.077±0.004[1] |
| Astrometry | |
| Radial velocity (Rv) | −24.7±1.6[1] km/s |
| Proper motion (μ) | RA: −0.422[2] mas/yr Dec.: −8.319[2] mas/yr |
| Parallax (π) | 4.0515 ± 0.0410[2] mas |
| Distance | 805 ± 8 ly (247 ± 2 pc) |
| Absolute magnitude (MV) | −0.32[1] |
| Details | |
| Mass | 3.6[2] M☉ |
| Radius | 4.2[2] R☉ |
| Luminosity | 268[2] L☉ |
| Surface gravity (log g) | 3.78[2] cgs |
| Temperature | 11,773[2] K |
| Metallicity [Fe/H] | 0.50[5] dex |
| Rotation | 9.3[6] days |
| Rotational velocity (v sin i) | 3.0[7] km/s |
| Age | 176[8] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
46 Aquilae is a star in the constellation of Aquila, located to the north of Tarazed (γ Aquilae). 46 Aquilae is its Flamsteed designation. It is a dim, blue-white hued star that is a challenge to view with the naked eye, having an apparent visual magnitude of 6.33. This object is located approximately 805 light years from the Sun, based on parallax. It is moving closer to the Earth with a heliocentric radial velocity of −25 km/s.[1]
This body has a stellar classification of B9 III,[3] matching a late B-type giant star. It is a chemically peculiar star of a weak Mercury-Manganese type (CP3),[7] and is the most chromium–deficient star known.[10] The star may possess a magnetic field with a strength greater than 2 kG.[11] It is radiating 268 times the luminosity of the Sun from its photosphere at an effective temperature of 12,900 K.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters 38 (5): 331, doi:10.1134/S1063773712050015, Bibcode: 2012AstL...38..331A.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 Cowley, A. et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal 74: 375–406, doi:10.1086/110819, Bibcode: 1969AJ.....74..375C.
- ↑ Crawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars", Astrophysical Journal 137: 530, doi:10.1086/147526, Bibcode: 1963ApJ...137..530C.
- ↑ Smith, K. C.; Dworetsky, M. M. (1993), "Elemental Abundances in Normal Late B-Stars and Hgmn-Stars from Co-Added IUE Spectra - Part One - Iron Peak Elements", Astronomy and Astrophysics 274 (2): 335, Bibcode: 1993A&A...274..335S.
- ↑ Oelkers, Ryan J.; Rodriguez, Joseph E.; Stassun, Keivan G.; Pepper, Joshua; Somers, Garrett; Kafka, Stella; Stevens, Daniel J.; Beatty, Thomas G. et al. (2018), "Variability Properties of Four Million Sources in the TESS Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey", The Astronomical Journal 155 (1): 39, doi:10.3847/1538-3881/aa9bf4, Bibcode: 2018AJ....155...39O.
- ↑ 7.0 7.1 Ghazaryan, S. et al. (November 2018), "New catalogue of chemically peculiar stars, and statistical analysis", Monthly Notices of the Royal Astronomical Society 480 (3): 2953–2962, doi:10.1093/mnras/sty1912, Bibcode: 2018MNRAS.480.2953G.
- ↑ Gontcharov, G. A. (2012), "Dependence of kinematics on the age of stars in the solar neighborhood", Astronomy Letters 38 (12): 771, doi:10.1134/S1063773712120031, Bibcode: 2012AstL...38..771G.
- ↑ "46 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=46+Aql.
- ↑ Savanov, I.; Hubrig, S. (October 2003), "Vertical distribution of chromium in the atmospheres of HgMn stars", Astronomy and Astrophysics 410: 299–305, doi:10.1051/0004-6361:20031270, Bibcode: 2003A&A...410..299S.
- ↑ Hubrig, S. et al. (2001), "Magnetic Field Diagnosis in HgMn Stars", in Mathys, G.; Solanki, S. K.; Wickramasinghe, D. T., Magnetic Fields Across the Hertzsprung-Russell Diagram, ASP Conference Proceedings, 248, San Francisco: Astronomical Society of the Pacific, p. 387, ISBN 1-58381-088-9, Bibcode: 2001ASPC..248..387H.
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