Telescope Reviews: Limit Mag Charts and Tables M45 -- LINK

Chart updated 4-23-05

This is a link to my Limiting Magnitude Study Chart of M45. The current chart has newly added, a variety of stars between mag 12.0 and 13.0. Primarily developed for determining Limiting Magnitude in binoculars, the original charts had stars to mag 12.0. Some recent observations with the high powered BT100 Oberwerk binocular telescope maxed out the mag 12 charts. Also, verifications with small scopes required a few additional targets to mag 13. And those of you who may have opportunity to observe under mag6+ skies will need the stars in the range of mag 12-13.

These are not easy targets. Practice with the chart is advise to ensure you can comfirm you are observing the correct targets. You need to become familiar with the star patterns to confirm you are in the proper location.

Under various skies between mag 5.0 and 5.6, I have seen to the following limits:

22x100 Oberwerk to mag 11.87
25x100 Celestron to mag 11.96
BT100 Oberwerk at 24x to mag 11.5 (under mag 4.8 skies)
BT100 Oberwerk at 36x to mag 12.0 (mag 5.4 skies, maxed out, prior to upgrade charts)
5" Celestron G5 scope with 18mm SWA at 76x to mag 11.94 (mag 5.1 skies)

The attachment (see title block above) in this post is the Table of Magnitudes.

The link that follows is to the chart which resides in my photo gallery.
M45 Limiting Magnitude Chart of Stars to Mag 13.0

edz

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Edited by EdZ (04/28/05 08:46 AM)

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