46 Aquilae
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| 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 mas[2] |
| 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 | |
| 46 Aql, BD+11°3954, GC 27263, HD 186122, HIP 96931, HR 7493, SAO 105156[9] | |
| 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
- ^ a b c d e f Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- ^ a b c d e f g h i j k Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b Cowley, A.; et al. (April 1969), "A study of the bright A stars. I. A catalogue of spectral classifications", Astronomical Journal, 74: 375–406, Bibcode:1969AJ.....74..375C, doi:10.1086/110819.
- ^ Crawford, D. L. (February 1963), "U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars", Astrophysical Journal, 137: 530, Bibcode:1963ApJ...137..530C, doi:10.1086/147526.
- ^ 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.; Siverd, Robert J.; Lund, Michael B.; Kuhn, Rudolf B.; James, David; Gaudi, B. Scott (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, arXiv:1711.03608, Bibcode:2018AJ....155...39O, doi:10.3847/1538-3881/aa9bf4.
- ^ a b 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, arXiv:1807.06902, Bibcode:2018MNRAS.480.2953G, doi:10.1093/mnras/sty1912.
- ^ Gontcharov, G. A. (2012), "Dependence of kinematics on the age of stars in the solar neighborhood", Astronomy Letters, 38 (12): 771, arXiv:1606.08814, Bibcode:2012AstL...38..771G, doi:10.1134/S1063773712120031.
- ^ "46 Aql". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-06-05.
- ^ Savanov, I.; Hubrig, S. (October 2003), "Vertical distribution of chromium in the atmospheres of HgMn stars", Astronomy and Astrophysics, 410: 299–305, arXiv:astro-ph/0309562, Bibcode:2003A&A...410..299S, doi:10.1051/0004-6361:20031270, S2CID 14487812.
- ^ Hubrig, S.; et al. (2001), "Magnetic Field Diagnosis in HgMn Stars", in Mathys, G.; Solanki, S. K.; Wickramasinghe, D. T. (eds.), Magnetic Fields Across the Hertzsprung-Russell Diagram, ASP Conference Proceedings, vol. 248, San Francisco: Astronomical Society of the Pacific, p. 387, Bibcode:2001ASPC..248..387H, ISBN 1-58381-088-9.