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ASTRO: Thor's Helmet in Halpha
Last night I was blessed with another clear night. There was a lot of moon
and it was up high most of the night, but I was using Ha and [OIII] filters so I wasn't too worried about it; I was just happy to have a clear sky after all the rain we've had recently. I took some more data for the Cone project and began taking some exposures of Thor's Helmet in Ha and [OIII]. I did not get but one hour's worth of Ha for Thor but did assemble it into a sample shot: sort of an early look-see at what may be in store. http://www.rdcrisp.darkhorizons.org/..._thor_page.htm I used my Dream Machine exposed through a Custom Scientific 3nm Ha filter. The scope was my C14. I used and AO7/ST7 for guiding via an RCOS Optical Systems Dichroic Beam Splitter. The C14 is running about f/12.46 with the long imaging train hanging off the back. At that slow focal ratio, I was running 20 minute exposures and took three, which were median combined to make the image. More results when they become available. Richard |
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