Scientific David H. Levy Comet Hunter Maksutov-Newtonian 152mm
f/4.8 mounted piggyback on Meade LX 200 Classic 12 inch
XT/350d modified with Baader type 1 filter by Hap Griffin
three-minute sub-esposures at iso 1600
|| PHD Guide from
Stark labs with Meade DSI pro I on Meade 12-inch LX 200 Classic
|| Images acquired,
calibrated, stacked and color corrected with Nebulosity 2.2.7
from Stark Labs. Further processing in Photoshop CS 3.
links to more information
|| for more information
try http://en.wikipedia.org/wiki/Messier_99 and links from there,
especially the argument for HI 21.