How To Find Caldwell 9, the Cave Nebula

How To Find Caldwell 9, the Cave Nebula 

Caldwell 9, the Cave Nebula.jpg

Caldwell 9, the cave nebula is found 2,400 light years away. It is actually a nebula within a nebula and contains reflection, emission and dark nebulosity. This is a very difficult nebula to observe and some people describe it as "unobservable". It also has the name Sh2-155.

Image credit: Hewholooks

Telescopic Image to Scale:


This image is the size of a full moon for size comparison.

Other Names:

Caldwell 9

Cave Nebula

Sh 2-155

LBN 529


Magnitude = 7.7

Surface brightness = Unk

Telescope Aperture City Suburbs Rural Dark Sky
4 inches 9 10 11 12.5
5 inches 9.5 10.5 11.5 13
6 inches 10 11 12 13.5
8 inches 10.5 11.5 12.5 14
10 inches 11 12 13 14.5

Use this chart to estimate if you can see the object from your location with your telescope. For more help on using this chart click here.

How to Find It:

This nebula officially resides in the Cepheus Constellation. It's co-ordinates are: RA 21h 44m 15.57 DEC +52° 32′ 59.4″ if you are using guiding software. The image below shows its location in the crosshairs.

How to Find Caldwell 9, the Cave Nebula.jpg

To find more space objects have a look at the constellation guide by clicking the link or go back to the list of deep space objects.

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