Observers' Challenges for August 2019

oecheverri's picture
Here are the Observers' Challenges for August 2019.
Beginner Challenge Intermediate Challenge Advanced Challenge Lunar Challenge

(NGC 6523)

a.k.a the Lagoon Nebula, is an open star cluster with nebulosity in Sagittarius.

Image from Wikipedia

NGC 6886
NGC 6886 is a planetary nebula with a size of only about 0.3 X 0.45 light-year, located some 7,000 to 11,000 light-years away from Earth in the northern constellation of Sagitta.

Image from Courtney Seligman

Abell Galaxy Cluster 2151

also known as the Hercules Cluster (and not to be confused with the globular cluster M13)  comprises about 200 galaxies some 500 million light-years distant in the constellation Hercules. It is rich in spiral galaxies and shows many interacting galaxies.

Image source

Rupes Kelvin & Promontorium Kelvin
Rupes Kelvin is a 78 km long escarpment near Promontorium Kelvin, a headland  located in the southeast of the Mare Humorum.

Image from Antonio Chidadao's "Moon Light Atlas"

I'd like to see more people submit reports than did this past month -- I encourage everyone to participate, not just imagers! You can submit reports by way of images, sketches, or even without any imagery, you can come up and give a verbal report that perhaps includes the conditions you made your observations under, and the details of the equipment you used -- and of course a description of the object as you observed it! Be sure to send them to me for inclusion in the next meeting at meetingchair[at]