Haro
3-75 is an obscure planetary nebula in Orion. Until
recently both its catalog position and magnitude have had large
errors. McNeil lists the position of H 3-75 as 05h40m44.8s +12o21'16"
, which is the only reference I was able to find that lists the
correct location. I also found this object to be about one
magnitude brighter than the listed photographic magnitude of 13.9,
which should make it visible in telescopes as small as 12" or
perhaps 10".
Although not large by
any standards, I found this 24" nebula fairly easily at 80x
while searching the area in my 18-inch without a filter. 
The view in an 12.5-incg
66x. North is down and east is right.
 This
planetary was intriguing in my 18-inch f/4.5 truss Dob at
425x. It appeared as a bright knot, or central star,
surrounded by a fainter, elliptical envelope. Although
fainter, the envelope was obvious without averted vision. It
almost looked more like an elliptical galaxy with a bright core than
a planetary nebula.
This DSS image displays a
3' field. North is down and east is to the right.
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