NGC2359 & Haffner 6
Wolf Rayet Bubble and Open Cluster in Canis Major
Optics: 12.5" f/5 Newtonian w/Lumicon Coma Corrector
Platform: Astrophysics AP1200
Camera: Hutech Modified Canon XTi @ ISO800
Exposure: 18 x 5m = 90mins
Location: Payson, Arizona
Elevation: 5150 ft.
Sky: Seeing 8/10, Transparency 9/10
Outside Temperature: 35F
Processing Tools: Photoshop CS2, Images Plus 3.82
HOME GALAXIES EMISSION NEBS REFLECTION NEBS COMETS
GLOBULARS OPEN CLUST PLANETARIES LINKS
few objects in the sky as unusual as this nebula. This bubble
of ionized gas is caused by a Wolf Rayet type star with a fierce
stellar wind carving a spherical bubble in the middle of a cloud
of gas, causing it to glow with primarily OIII and Hydrogen light.
About a quarter degree in size, this primary object is accompanied
by a loose open cluster, which I've framed in the bottom right
corner, Haffner 6. Containing roughly 60 stars in an area of
5 arc minutes, this 9th magnitude moderately rich cluster is
nearly buried amongst a field of thousands of Milky Way stars.
The Nebulas Photographic
I have photographed
this object for years with both film and CCD. My film shots are
almost always a very close shade to white, since the films response
to the teal OIII line was virtually non existent. CCD shows more
reds in the upper regions, with either a blue or green bubble
depending on the brand RGB filters you use. Here, a combination
of the OIII and HII yield a close to accurate teal color, with
red hydrogen excitation along the edges. I feel this is very
close to what the eye would see if we could detect color in such
a faint object.