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Very interesting, Gregg! It is unusual that a nebula would "light up", then go dark over such a short period of time. Is there any speculation as to why? Perhaps a hidden nova?
On 12/20/2020 4:48 PM Gregg Ruppel <ruppel0709@...> wrote:
Great image. You might be interested to know that the variable nebula, widely known as McNeil's Nebula is not apparent on your image - that's because it apparently disappeared back in 2018 after being visible for several years. The nebula was originally described/discovered by Patrick McNeil in January of 2004. He imaged it with a Takahashi FC-76. I had imaged the exact same area about a month earlier with my Tak FC-76, but failed to notice the wisp of nebulosity that wasn't there before! I'm attaching my image...
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On 12/20/2020 4:28 PM, MJ Post wrote:
It seems everyone is processing data from our period of clear skies and minimal moon at DSNM. Here's another just-completed project from our observatory - the LRO (LoBo Robotic Observatory, LoBo being both the New Mexico mascot and short for Longmont/Boulder). Same setup - CDK14 scope, ASI 6200MM camera, one hour each R, G, and B filters.
NGC 2071 is the upper reflection nebula and the red glow at the top is the southern-most portion of Barnard's loop. This is one of my favorite targets, and a pleasure to observe from our dark-sky community!