New Comet SWAN21D
Taken by Mike Olason on March 3, 2021 @
Tucson, Arizona
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Camera Used: Unavailable Unavailable
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Details:
Comet SWAN21D is a new comet that is about magnitude 10 and currently is just above the western horizon as it gets dark. This image was taken at an altitude of 6 degrees at the end of twilight, it is composed of 10 images each only 15 seconds long. According to the latest ephemeris the comet is at perihelion in its orbit on March 4 and may brighten a little more as it makes its close approach to Earth later this month at 149 million miles, in this image the comet was 155 million miles from Earth. Unfortunately the images had to be collected with a small portable 66mm refractor telescope and an ASI178MC camera with no guide scope with lots of light pollution, at the end of twilight and haze at an altitude of 6 degrees.
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