Ron Brecher ( astrodoc.ca ) Sh2-98
is one of the fainter members of the Sharpless
catalogue. However, there is scant information
that is readily about it,
so I can’t tell you just how faint it
is. It is big, with half the Moon’s diameter
in the sky. The cosmic donut is a molecular
cloud with about 3000 times the Sun’s mass,
lying around 12,000 light years away. Sh2-98
is lit up by the red star in the nebula, known as
WR130 is a Wolf-Rayet star and emits lots of
energy that blows a bubble in the surrounding
A more familiar example of this type of nebula is
the Bubble Nebula.
As a bonus, little red planetary nebula Henize1-4
glows at magnitude 10.5, just below the two bright
stars to the upper right of the image.
Acquisition in Maxim DL. All pre-processing and
processing in PixInsight. Acquired from my SkyShed
in Guelph, ON.
SBIG STL-11000 with Baader HaRGB filters. 10″ ASA @
f/6.8 on a Paramount MX.
Guiding with SV-80 80 mm f/6 refractor and camera’s
Remote Guide Head. Imaging runs were scripted using
Moon near first quarter for RGB data and near
full for H-alpha. Transparency and seeing very good
for R, G and B and excellent for H-alpha.