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#1
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ASTRO: M27 with halo
M27's halo is not an extremely faint object, but still difficult for city skies.
I gathered data in four short (without astronomic dawn) nights in June. One of those nights had an 80% full moon in addition to the city lights. I only took Ha in that night. Taken from Berlin with a Celestron RASA on a G11 mount, ASI 1600MM cool camera, 133x2 min Halpha and 124x2 min OIII. I have attached a full HD crop, the full field can be found at http://ccd-astronomy.de/temp12/M27colourgut.jpg Stefan |
#2
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That's a lot of images to stack and a lot of disk space. I'm already up to about 4 terabytes and taking nowhere near that number of frames per object.
Not having OIII I tried H alpha a number of years ago. Even after 90 minutes, the halo was splotchy with gaps. I was pretty green about processing back then so may be due to my techniques. I suppose I should try again. Rick Quote:
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