EquipmentMcLellan 1.0m Telescope

The McLellan 1.0m Telescope, was installed at the Mt John Observatory in 1986. It is a Dall-Kirkham Cassegrain telescope, mainly used for high-resolution spectroscopy of stars with a Hercules vacuum echelle spectrograph (spectroscopy is the study of the way atoms absorb and emit electromagnetic radiation). The data can be used to measure star velocities, temperatures, pressures, chemical composition, rotation rates and other parameters. Secondary optics are available for cassegrain foci at f/7.7 and f/13.5. Much of the work is now at the f/7.7 focus, which has wide-angle optics that provide a 1-degree diameter field of view. The f/13.5 focus is only used for single stars on axis. The dome automatically tracks the telescope. All available MJUO instruments can be mounted on the McLellan Telescope.

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