The Orion's Ring Nebula, Abell 13 (PK204-8.1) is a planetary nebula located approximately 3,900 light-years away in Orion.
The object is a very faint (15.3 m), the main emission lines are Ha and NII. Angle dimensions 2.9'x2.2'. The central blue star has a magnitude of about 18.8m.
L-channel - 23 x 300 sec. bin 1x1;
R-channel - 18 x 300 sec. bin 1x1;
G-channel - 18 x 300 sec. bin 1x1;
B-channel - 18 x 300 sec. bin 1x1;
Ha- 35 x 600 sec. bin 2x2.
Total integration time - 12:15 hours.
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