Allsky Star Trails

The cosmos at our fingertips.
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Chris Peterson
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Allsky Star Trails

Post by Chris Peterson » Mon Feb 06, 2023 3:32 pm

A fun little project. This is a stack of about 8000 images taken at 5-second intervals over 11 hours last new Moon. The hover image is from about the middle of the sequence so that individual stars can be seen (also marked in green on the trail image). Ann, you might appreciated this, as you've observed in the past how tricky it is to identify specific stars with trails in similar images.
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Click to view full size image 1 or image 2
And here's a chart just for reference.
Chris

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Chris L Peterson
Cloudbait Observatory
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Ann
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Re: Allsky Star Trails

Post by Ann » Tue Feb 07, 2023 6:00 am

Chris Peterson wrote: Mon Feb 06, 2023 3:32 pm A fun little project. This is a stack of about 8000 images taken at 5-second intervals over 11 hours last new Moon. The hover image is from about the middle of the sequence so that individual stars can be seen (also marked in green on the trail image). Ann, you might appreciated this, as you've observed in the past how tricky it is to identify specific stars with trails in similar images.
_
Click to view full size image 1 or image 2
And here's a chart just for reference.
Thanks, Chris, great work and very fascinating! :D

There is a bright trail passing through Leo but missing the bright stars. Regulus, the brightest star of Leo, leaves a considerably fainter trail. What is the bright trail passing through Leo?

There is also a very bright trail without an obvious source to the right of Orion, but I think that might be the trail of Jupiter.

Ann
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Chris Peterson
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Posts: 18051
Joined: Wed Jan 31, 2007 11:13 pm
Location: Guffey, Colorado, USA

Re: Allsky Star Trails

Post by Chris Peterson » Tue Feb 07, 2023 3:15 pm

Ann wrote: Tue Feb 07, 2023 6:00 am Thanks, Chris, great work and very fascinating! :D

There is a bright trail passing through Leo but missing the bright stars. Regulus, the brightest star of Leo, leaves a considerably fainter trail. What is the bright trail passing through Leo?

There is also a very bright trail without an obvious source to the right of Orion, but I think that might be the trail of Jupiter.
Arcturus. Same declination (+19) as the stars the trail passes in Leo, brighter than Regulus, and just past the meridian when the sequence ends before dawn.

And yes... the bright trail to the west is Jupiter, which has set by the time of the reference image, so isn't on it or the chart. Below is the sky about 30 minutes into the sequence, and the corresponding sky chart.
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integration.jpg
chart.png
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Chris

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Chris L Peterson
Cloudbait Observatory
https://www.cloudbait.com