SNR Can­did­ate G70.5+1.9 in Cygnus

G70.5+1.9 is a can­did­ate super­nova rem­nant dis­covered in 2009. It meas­ures approx­im­ately 5x3 arcminutes and its beau­ti­ful struc­ture con­sists of a series of inter­lock­ing elong­ated and curved fil­a­ments with its south­ern rim being the bright­est part. OIII in par­tic­u­lar reveals an impress­ive tail struc­ture with a length of 8 arcminutes that extends to the left. The pub­lic­a­tion about the dis­cov­ery can be found here.

Fur­ther to the south is the Sh2-100 emis­sion neb­ula com­plex (left) and Sh2-99 (right).

The image is a com­bin­a­tion of long exposed nar­row­band data (Ha, OIII) with RGB data. North is up in this image.

[descrip­tion from Sakib Rasool]