APC AP9212 Guia do Utilizador descarregar pdf (Página 15)

Figure 2-2 Telescope

Originally a Baker-Nunn satellite tracking camera, the telescope was donated to The University of

New South Wales by the Smithsonian Institute in 1986. Since then, it has been significantly

modified. The optics were redesigned to allow the use of standard 5-mm astronomical filters (see

Appendix E.4), and also to produce a flat focal plane. This is discussed in more detail in

Appendix E.5.

Currently the telescope is fitted with a green ‘V’ filter. Changing filters is a complicated process

and it is desirable to automate this function in the future, as suggested in Chapter 7.2.1.

There is also a 110V mirror heater installed to prevent the build-up of dew within the optics of the

telescope.

Most professional telescopes, such as the nearby 2.3m

, are designed to view an area

approximately 0.1º x 0.1º of the sky. The APT, however, is a wide-view telescope with a viewing

area of 5º, although, due to the current limited size of the CCD installed, images are only 3ºx 2º

In the future, a newer CCD camera will be installed capable of utilising the full viewing area of

the telescope.

2.3m diameter primary mirror

3 degrees (E-W) x 2 degrees (N-S)

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