Because moonlight can badly affect your images, we offer significant discounts when observing with the moon above the horizon.
The discounts are based on the moon illumination (100% means full moon, 0% means new moon). The discounts are as follows:
- 10% of the full cost for moon illuminations between 25% and 50%
- 25% of the full cost for moon illuminations between 50% and 75%
- 50% of the full cost for moon illuminations higher than 75%
There is no discount for moon illuminations less than 25%.
When you use automated scheduling, you can select the preferred moon illumination during the Scheduling step in the New Request Submission form, the credit discount will appear on the Request Summary sidebar on the right. Note that our automated scheduler will still schedule your observations at lower moon illuminations if the schedule of the telescope is free, and the discount will still apply!
When using custom scheduling, the discount will be calculated based on the average moon phase during the observing times of your request.
The moon discount in credits will be shown in the request summary during the request submission: