2019-09-02, 09:41 PM
[quote pid='2234' dateline='1567457699']
Thanks Greg much!
For naked eye magnitude I typically look for two specific stars near Polaris.
One having a magnitude of 4.24 and the a magnitude of 6.46.
When I can see both without having to use averted vision – I approximate that as a magnitude 6 seeing night.
But that is probably not any where near the accuracy you’re describing – where I believe one checks at zenith for around 25 stars to get a more accurate reading.
I would think the sky at zenith would probably produce a higher mag seeing-value than looking 44 degrees at my two select stars near Polaris. Do you think it would make all that much difference?
On NGC 6543 I figure I’m not going to actually see this object with less than 150x magnification.
With a 10mm lens I’m at 120x and not seeing it – and with a 6mm lens I’m at 200x and seeing nothing but pure black.
So I assumed my sky was simply not dark enough for me to see that object – even with a 10” scope.
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Thanks Greg much!
For naked eye magnitude I typically look for two specific stars near Polaris.
One having a magnitude of 4.24 and the a magnitude of 6.46.
When I can see both without having to use averted vision – I approximate that as a magnitude 6 seeing night.
But that is probably not any where near the accuracy you’re describing – where I believe one checks at zenith for around 25 stars to get a more accurate reading.
I would think the sky at zenith would probably produce a higher mag seeing-value than looking 44 degrees at my two select stars near Polaris. Do you think it would make all that much difference?
On NGC 6543 I figure I’m not going to actually see this object with less than 150x magnification.
With a 10mm lens I’m at 120x and not seeing it – and with a 6mm lens I’m at 200x and seeing nothing but pure black.
So I assumed my sky was simply not dark enough for me to see that object – even with a 10” scope.
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