Tagged: ER61 - Adam Lundie - Eatons Hill Observatory

C/2015 ER61 is a comet from the inner Oort cloud approximately 8-20 metres in diameter. By April 19th 2017 it will reach its closest point to Earth, and on May 10th it will reach its closest point to the Sun. It will not be back again for another 9000 years.

Comets move fast. So fast that you cannot use stars to guide your telescope. With an on-axis guider I was able to lock the telescope on to the fuzzy comet. This animation shows how fast the comet moves over a 30 minute period.