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Resolving the Effects of Rotation in Altair with Long-Baseline Interferometry, D. M. Peterson et al., The Astrophysical Journal636, #2 (January 2006), s. 1087–1097, doi:10.1086/497981, Bibcode: 2006ApJ...636.1087P}}}; see Table 2 for stellar parameters.
Altair's Oblateness and Rotation Velocity from Long-Baseline Interferometry, Gerard T. van Belle, David R. Ciardi, Robert R. Thompson, Rachel L. Akeson, and Elizabeth A. Lada, Astrophysical Journal559 (1. oktober 2001), s. 1155–1164, doi:10.1086/322340, Bibcode: 2001ApJ...559.1155V}}}.
Altair: The Brightest δ Scuti Star, D. L. Buzasi et al., The Astrophysical Journal619, #2 (February 2005), s. 1072–1076, doi:10.1086/426704, Bibcode: 2005ApJ...619.1072B}}}.
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vizier.u-strasbg.fr
HR 7557, database entry, The Bright Star Catalogue, 5th Revised Ed. (Preliminary Version), D. Hoffleit and W. H. Warren, Jr., CDS ID V/50. Henta 22. mars 2015.