designed by Lluís Romero Ventura
NGC 7635 THE BUBBLE NEBULA
NGC
7635,
also
called
the
Bubble
Nebula,
Sharpless
162,
or
Caldwell
11,
is
a
H
II
region
emission
nebula
in
the
constellation
Cassiopeia.
It
lies
close
to
the
direction
of
the
open
cluster
Messier
52.
The
"bubble"
is
created
by
the
stellar
wind
from
a
massive
hot,
8.7
magnitude
young
central
star,
SAO
20575
(BD+60°2522).
The
nebula
is
near
a
giant
molecular
cloud
which
contains
the
expansion
of
the
bubble
nebula
while
itself
being
excited
by
the
hot
central
star,
causing
it
to
glow.
It
was
discovered
in
1787
by
William
Herschel.
The
star
BD+60°2522
is
thought to have a mass of about 44 M☉.
With
an
8
or
10-inch
(250
mm)
telescope,
the
nebula
is
visible
as
an
extremely
faint
and
large
shell around the star.
The
nearby
7th
magnitude
star
on
the
west
hinders
observation,
but
one
can
view
the
nebula
using
averted
vision.[6]
Using
a
16
to
18-
inch
(460
mm)
scope,
one
can
see
that
the
faint
nebula
is
irregular,
being
elongated
in
the
north
south direction.
NGC 7635 THE BUBBLE NEBULA
Place: Ager-Lleida-Spain
SQM: 21.5
Dates: 06-07-SEP / 30-31 OCT / 2-6 DEC
2016
Details
Telescope: GSO RC14 Truss
Mount: ASA DDM85
Camera: Moravian G3-11000
Focuser: Feather Touch 3 Kit Boss II
Flattener: TS 2.5
Filters: Astrodon LRGB Gen2 I-Series
True-Balance
Exposure: L:14x600 sec bin1
RGB: 34x300 sec bin2
H-Alpha: 26x900 sec bin1
Processing: Pixinsight & Photoshop CC
Software: MaximDL, Sequence,Autoslew
Control Remote: Talon6
Nebula
& Dust