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The entire constellation
of Cepheus is filled with hydrogn glowing dimly. Here in the
RASA 11 image is one bright spot, Sharpless 2-140 which surrounds
a few hot blue stars. On its southern edge, we see a sharp transition
where gas meets thick dust and forms a bow shock.
In the Context image,
which was taken simultaneously with the Samyang 135mm lens, we
can see the 12 degree wide surrounding field is indeed packed
with wreaths of nebulosity everywhere and numerous dark dust
clouds. On the right edge is Sharpless 2-137, Lower right of
center is a large contorted area called LBN494, Sharpless 2-150
is above center, and finally Sharpless 2-154 is on the lower
left corner. It is clear that numerous other beautiful targets
for the RASA lie in this amazing field.
Technical Data: 11"
f/2.2 RASA astrograph, ASI6200mm + Baader LRGB filters, Context:
Samyang 135mm f/2.4, ASI2600MC, Integration time = 3h total,
Happy Jack, Az.
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