Observatory Tools

Exposure Time Calculator

We have provided a tool to help you decide what exposure time your target will need on our different classes of telescope and using different filter sets.

Target Visibility Calculator

When planning your observing request it is import to make sure your targets will be visible, from which sites and during which time periods. The Visibility Calculator will show you all of this.

Contention of the Network

Plots of which LCO resources are most in demand and where in the sky there is most demand for observations.


Know your target's name but not it's coordinates? LookUP will find all non-moving target coordinates and also search our archive of public images for previous observations.

On Sky slot calendar

On Sky slots show observations being made in real-time, in the public domain. This calendar shows when they are happening and at which LCO site.