M71 in Sagitta

M71 Cluster Astrophotography Martin Rusterholz

M71 also known as NGC 6838 is a glob­u­lar cluster in the con­stel­la­tion Sagitta near the middle of the image. In the upper left corner, the plan­et­ary neb­ula WeSb 5 (PN G058.6–05.5) is vis­ible, while Sh2-84 and a cres­cent shaped Wolf Rayet neb­ula asso­ci­ated with the Wolf Rayet star WR 128 can be found in right part of the image. The blue cres­cent neb­ula around WR 128 was dis­covered in 1982 and is formed by mass loss ejecta from the star, which is ion­ized by its radi­ation. The huge Ha cloud in the back­ground is uncata­logued and its nature is unknown. It can best be seen in the star­less Ha image, which was cre­ated using a Red Con­tinuum fil­ter. Best seen in the annot­ated image is the very small plan­et­ary neb­ula Mul 5, which was dis­covered by the ama­teur astro­nomer Lionel Mulato in 2013.

The field cov­ers about 3.5x3.5 deg of the sum­mer sky. Long exposed Ha data was com­bined with OIII and RGB. North is up in this image.

The field was sug­ges­ted by Sakib Rasool who helped me cre­at­ing the text and annotations.


Taka­hashi FSQ-106EDX III
Andor CG16M
Astro­don Gen2
HaOIIIR­GB 1050:450:200:160:170 min.
ROSA Remote Obser­vat­or­ies South­ern Alps
© Mar­tin Ruster­holz, Astrophotographer

Find­er Chart M71 Cluster in Sagitta

M92 Cluster in Hercules Astrophotography Martin Rusterholz Skychart

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.