Orbital period changes for the Algol-type eclipsing binary AI Dra were studied based on the analysis of its observed times of light minimum. The period variation showed cyclic changes in the interval from JD. ≈ 24 36000 to JD. ≈ 24 47500 and a secular period increase rate (dP/dt = 2.44 × 10 d/year) starting from JD. ≈ 24 48500 up to 24 55262, in a time scale equals to 5 × 10 year.
Abed, A. M. (2013). Orbital period variation study of the low-mass Algol eclipsing binary AI Draconis. NRIAG Journal of Astronomy and Geophysics, 2(1), 21-26. doi: 10.1016/j.nrjag.2013.06.005
MLA
Azza M. Abed. "Orbital period variation study of the low-mass Algol eclipsing binary AI Draconis", NRIAG Journal of Astronomy and Geophysics, 2, 1, 2013, 21-26. doi: 10.1016/j.nrjag.2013.06.005
HARVARD
Abed, A. M. (2013). 'Orbital period variation study of the low-mass Algol eclipsing binary AI Draconis', NRIAG Journal of Astronomy and Geophysics, 2(1), pp. 21-26. doi: 10.1016/j.nrjag.2013.06.005
VANCOUVER
Abed, A. M. Orbital period variation study of the low-mass Algol eclipsing binary AI Draconis. NRIAG Journal of Astronomy and Geophysics, 2013; 2(1): 21-26. doi: 10.1016/j.nrjag.2013.06.005
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