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ASTRO: Nova Vulpecula 2007 revisited
Some nova fade slowly, some rapidly. This appears to be a slow nova.
Some stay blue as they fade but those that throw out hydrogen turn red as they fade. It appears this is a slow, hydrogen rich nova. I've tried to match my August 10 shot to the one I grabbed last night just before the clouds cut me off. Seeing was much better which has had an effect on the star colors and size. Not to mention that I used 2 minute subs for this shot and only 1 minute ones for the August shot. So they aren't as comparable as I'd like. I discovered my error just as the clouds rolled in so couldn't retake it to match. The far better seeing also made a difference. Still the change from blue to red is quite evident. It has faded from Mag 9.4 to 10.1. Only a 0.6 drop in nearly a month. The Mira variable SS Vulpecula to the upper right faded as well from 9.4 (same as the nova) to 9.7. Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
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