This is the California Nebula (NGC1499) shot over a four night period with refractor and dedicated monochrome astronomical camera in Hydrogen-alpha, Oxygen III, RGB. This is an emission nebula in constellation Perseus and was named because of its shape resembling the state of California.
Ha - 12 hours
OIII- 9.5 hours
Red- 2 hours
Green- 2 hours
Blue- 2 hours
27.5 hours total exposure
Fantastic image Chris! One of the best I have seen of this target. What was the total integration time?
That’s a marvelous work chris