Celestial hemisphere:  Northern  ·  Constellation: Hercules (Her)  ·  Contains:  LBN 105  ·  Sh2-73
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Dark Skys Rule:  Sh2 73 from SRO versus San Francisco Bay Area, Jerry Yesavage
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Dark Skys Rule: Sh2 73 from SRO versus San Francisco Bay Area

Getting plate-solving status, please wait...
Dark Skys Rule:  Sh2 73 from SRO versus San Francisco Bay Area, Jerry Yesavage
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Dark Skys Rule: Sh2 73 from SRO versus San Francisco Bay Area

Equipment

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Description

By chance the SRO crew and I imaged the same object.

My light polluted image (left, 291x100s=29,100s) and the SRO pristine sky (right, 51x900s=45,900s).

I'll take the clear sky...

The exposures may actually be somewhat equivalent since the left is a Takahashi 180ED at F2.8 while the right is a Takahashi 106 ED is about F5.0 I believe. I believe the camera's have the same chip (KAF-8300 CCD).

PS Notice the difference in the star spikes with the two scopes.

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Sky plot

Sky plot

Histogram

Dark Skys Rule:  Sh2 73 from SRO versus San Francisco Bay Area, Jerry Yesavage

In these public groups

Sharpless2 Objects
Cloudy Nights