The Prediction of the Four-Axis-Tracking for Halley's Comet

The automatic tracking camera with four axes is used to track Halley's Comet along a small circle. It is required to predict the coordinates of the pole of the small circle (Ap, Hp), the latitude of the small circle δ_i⁰, the longitude of the orbit α_i⁰ and the tracking rate w_i⁰. In this paper, the prediction data of Halley's Comet in every six hours are transformed from the equatorial coordinate system (α, δ,t), of IHW into the coodinate system of our instrument (δ_i⁰, α_i⁰, ω_i⁰), The diagram of the calculation program is given as well.