Austrian amateur astronomer Matthias Kronberger was a key member of the Deep Sky Hunters group that discovered numerous planetary nebulae. Here of some of the ones attributed to Matthias.
Click on each image for more details.
Click on each image for more details.
Kn 9
Kn 43 and Pa J1940.3+1855
Kn 61
Kn 131
Kn 19
Kn 45
Kn 63
Kn 24
Kn 50
Kn 121
Kn 132
Kn26
Kn 59
Kn 130