Image of the day

Captured by
Lawrence Parchman

Sculptor Galaxy (NGC 253)

My Account

New to Astromart?

Register an account...

Need Help?

Limiting Magnitude Survey

Started by Kevin, 09/12/2006 03:35AM
Posted 09/12/2006 03:35AM Opening Post
Couple questions for the group,

Curious what you folks understand is the standard for naked eye limiting magnitude specifically whether it is direct vision or averted vision. The way I see it, is if you see the stars, you see the stars. I usually pick a constellation I have not done for awhile, and look for every star I can see around the main asterism, and then sketch them out looking them up later to learn how deep I was seeing.

Second,

does anybody have a good idea what the difference between their direct vision/averted vision limit is?

I had a decent nite tonite, and I guess my skies are not as bad as I thought they had become with nearby LP. I note stars to mag 5.6 in Ursa Minor. I could just barely make out the mag 5 star in the bowl with direct vision but I have some floaters these days that tend to be in my direct line of vision. I could see the haze of the milky way, but not the dust lane as I once could. Also have been able to make out M13 in years past. Although the air is just not as dry as it was say 6 or so years ago in the NE. Not as dark as Stellafane as a benchmark that folks might be familiar with especially at the horizon. I cannot see M33 naked eye as I have there.

Regards,
Kevin

Posted 09/12/2006 08:23AM #1
as a benchmark that folks might be familiar with

It's mite, Kevin 8)

Dmitri