R Coronae Aus­tral­is Neb­ula (Cald­well 68)

This image con­tains a couple of prom­in­ent objects in the con­stel­la­tion of South­ern Crown (Corona Aus­tral­is). The cen­ter of the image is dom­in­ated by the bright, blu­ish reflec­tion neb­u­lae NGC 6726 and NGC 6727. The small neb­ula to the lower left is NGC 6729, which has vari­able bright­ness and chan­ging form sim­il­ar to Hubble’s Vari­able Neb­ula in Mono­cer­os . Right below NGC 6726–7, you can see IC 4812 with its blu­ish arcs aroud the double­star WD 1450+432. In addi­tion, many red­dish Herb­ig-Haro (HH) objects can be seen in the dark clouds. All neb­u­lae belong to R Coronae Aus­tral­is and are about 500 lightyears distant.

Upper right of R Coronae Aus­tral­is, fam­ous star cluster NGC 6723 can be seen, which is about 30 000 lightyears away.


Taka­hashi FSQ-106EDX III
10Micron GM2000 HPSII
Astro­don Gen2
LRGB 500:240:225:210 min.
San Pedro de Atacama — Chile
© Mar­tin Ruster­holz, Astrophotographer

Find­er Chart R Coronae Aus­tral­is Nebula

R Coronae Australis Nebula Sky Chart - Astrophotography Martin Rusterholz

Image cre­ated by Skychart

About Me

Hello, my name is Martin Rusterholz. I’m a Swiss amateur astrophotographer living near Zurich, the biggest town in Switzerland. My interest in astronomy started when I was 16. At that time, I built my first Newtonian telescope and mount. I studied physics at the Swiss Federal Institute of Technology (ETH) which was the only study including at least some aspects of astronomy and astrophysics. “Looking at the nights sky is an experience touching everybody deeply inside, something common to all human beings independent to the language spoken by the individuals”. Deep-sky astrophotography is my passion.