On the priority in obtaining the new class of exact solutions to the optimal turn problem of a spherically symmetric rigid body

The priority of A.V. Molodenkov and Ya.G. Sapunkov in obtaining the new class of exact solutions to the optimal turn problem of a spherically symmetric rigid body or a spacecraft considered as a solid is substantiated. It is shown that the article by A.N. Sirotin “A Family of Extremal Angular Velocity Vector Functions with a Constant Absolute Value in the Problem of Optimal Reorientation of a Spherically Symmetric Body with Minimal Energy Consumption, Mechanics of Solids. 2019. V. 54. № 4. P. 502–513” repeats the article by A.V. Molodenkov and Ya.G. Sapunkov “Analytical solution of the optimal slew problem of a spherically symmetric spacecraft in the class of conical motion. Journal of Computer and Systems Sciences International. 2013. V. 52. № 3. P. 491–501” according to its results.