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209P/LINEAR 5-22-14 Tried again and this time the weather cooperatedjust long enough
I wanted to get some color data and make a color image but the skies had
other ideas. I got the data but it is so poor I didn't try to do a color version. This time some bright stars decided to try and steal the show. For such a small comet it is looking pretty good. It should as it was only 0.081AU from us 7.5 million miles. That's still about 30 times the distance to the moon. It was .999 AU from the sun, a tad inside our orbit as we are currently 1.012 AU from the sun. It's nearness to us gives a rather distorted view of its size. Tails of comets are often millions of miles long but the extent of the tail I picked up is only 2000 miles long as projected onto the sky. It's real length would be longer as we see it foreshortened. I didn't work out how much. The icy core of the comet is thought to be about 1 kilometer across or less making it a very small comet. Now for clear skies Saturday morning to see if it left any 150 year old debris for us to run into then. Like before the image was taken binned 3x3 for a 1.5" per pixel image scale. The gaps in the star-trails is due to the about 5 seconds between image frames needed to feed the data down a slow USB 1.1 data pipe the camera uses. 14" LX200R @ f/10, L=20x1'x3, STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
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209P/LINEAR 5-22-14 Tried again and this time the weather cooperated just long enough
Rick,
while it is small at least it looks like a real comet. Nice. Stefan "Rick Johnson" schrieb im Newsbeitrag ... I wanted to get some color data and make a color image but the skies had other ideas. I got the data but it is so poor I didn't try to do a color version. This time some bright stars decided to try and steal the show. For such a small comet it is looking pretty good. It should as it was only 0.081AU from us 7.5 million miles. That's still about 30 times the distance to the moon. It was .999 AU from the sun, a tad inside our orbit as we are currently 1.012 AU from the sun. It's nearness to us gives a rather distorted view of its size. Tails of comets are often millions of miles long but the extent of the tail I picked up is only 2000 miles long as projected onto the sky. It's real length would be longer as we see it foreshortened. I didn't work out how much. The icy core of the comet is thought to be about 1 kilometer across or less making it a very small comet. Now for clear skies Saturday morning to see if it left any 150 year old debris for us to run into then. Like before the image was taken binned 3x3 for a 1.5" per pixel image scale. The gaps in the star-trails is due to the about 5 seconds between image frames needed to feed the data down a slow USB 1.1 data pipe the camera uses. 14" LX200R @ f/10, L=20x1'x3, STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
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