Optolong 7nm Ha filter
Rosette nebula in HARGB. Difficult to fit in my field of view
18x600s light frames
19x600s Ha frames.
The Rosette Nebula NGC 2237.
The Rosette Nebula is so named because its clouds of gas and dusts resemble the petals of a rose. The nebula is about 5,000 light years away at the edge of the molecular cloud Monoceros, or the Unicorn constellation. The nebula is a region of the Milky Way filled with glowing gas and a central cluster of hot, young stars that are only a few million years old