Horizontal Heavens Observatory "...From  A Galaxy Far, Far Away"
Clear Sky Chart  

This page was last updated on 10/08/14.

Imaging Offsets Page

I spent nearly 4-hours collecting this data with back-to-back LUM-filter temperature matched pairs.  What I found is that the data does NOT appear to be linear in that the LUM data change rate actually increases as temperature drops get closer to 0C.

FOCUSER: FeatherTouch Focuser #FTF-2008 with 6.55 micron/step movement.

SCOPE: NP-127 measured at 522mm FL and f/4.1 with Televue proprietary NP-127 0.8x focal reducer.

CCD: ST-10XME w/CFW10 with ST-402ME Autoguider on TMB80/480.

MOUNT: Mountain Instruments MI-250