View Single Post
  #1  
Old 29-06-2015, 11:32 AM
strongmanmike's Avatar
strongmanmike (Michael)
Highest Observatory in Oz

strongmanmike is offline
 
Join Date: May 2006
Location: Canberra
Posts: 17,694
The Box Nebula and other faint PN's in Sagittarius

The Box Nebula (NGC 6445) is a fabulous little..?.."Gem" I guess in Sagittarius and made even more interesting by the fact that the small globular cluster NGC 6440 is in close proximity and makes for a lovely pairing.

Like most planetary nebulae the Little Gem looks best in narrowband so in order to show both the globular (which is reddened strongly by intervening dust) and the star field, plus the the Little Gem, all at their best, I have used a blend of narrowband data and RGB.

As a bonus and to my surprise, I found two other very small and faint planetary nebulae in the field, I couldn't find their designations so if anyone can help out with this, that'd be great

Both nights used were clear but with a significant Moon and cut short by heavy fog...always something The RGB was captured after Moon set.

The Box Nebula and two others (close up)

Full Field (slightly cropped for composition)

This was a full test (using Ha OIII & SII) of the new Astronomik 6nm filters and under Moonlight = very happy.

Mike
Attached Thumbnails
Click for full-size image (NGC 6445 small.jpg)
97.4 KB186 views

Last edited by strongmanmike; 29-06-2015 at 11:32 PM.
Reply With Quote