Finally, after weeks of clouded skies, a weekend night with a clear sky!
Encouraged by my attempt at Eta Carina through my 8" dob, tonight I trained my 17.5" dobbie at the same target, again from Sydney,
This time, I also used my Grand Daddy of all eyepieces, a 35mm Masuyama. A bit long for this f/4.5 scope, but my only OIII filter is a 1.25".
Eta Carina is not only huge, it is a very busy place. There are multiple shockwaves within it, masses of star formation both just initiated in the form of dark pillars, of those whose nuclear fires have just kicked in, nebulae within nebulae, and a super massive star about to go supernova.
This magnificent NASA site shows all of these details.
Again, the Homunculus Nebula is too small at 57X, but the supermassive star, Eta Carina, it is associated with is the bright reddish one.
Armed with a battery of sketching implements, the result of 3hrs is below. Ooooohhh, I am going to have soooooo much fun redoing this one at a dark sky site!
Scope: 17.5" f/4.5 dob
Gear: 35mm Masuyama, 57X, OIII filter
Date: April 8, 2011
Media: white pastel, white & black charcoal pencils, white chinagraph, white and coloured ink on black paper
A slightly bigger version is here