NGC 7635 or more commonly known as Bubble Nebula and is also categorised as Sharpless 162 (Sh2- 162), and Caldwell 11 (C11) is a H II region located in the constellation of Cassiopeia. It was first discovered by William Herschel in 1787. this target lies roughly 10000Ly away.
It is an emission nebula with a molecular cloud being excited by the hot central star which has an apparent magnitude of 8.7.
The Bubble Nebula resides close to Messier 52, an open cluster.
It is an emission nebula with a molecular cloud being excited by the hot central star which has an apparent magnitude of 8.7.
The Bubble Nebula resides close to Messier 52, an open cluster.
The Above target was taken during February over two nights. It is a total of 9 hours at 600-sec exposures and stacked. Post-processing was completed with Pixinsight. M52 can be seen in the bottom left-hand corner and is an amazing open cluster.
This target is circumpolar (never sets) and can be seen all year, with some seasons better than others depending on the time you wish to observe. This target is not visual friendly. A large scope will be required with aids of filters, but do not expect the world - this target is primarily a photo target.
This target is circumpolar (never sets) and can be seen all year, with some seasons better than others depending on the time you wish to observe. This target is not visual friendly. A large scope will be required with aids of filters, but do not expect the world - this target is primarily a photo target.
Update
I've recently revisited this target (funny enough a few months after I took the above photos, with my new system) and took just 2 hours of exposure. But I made a slight difference in location and instead of the open cluster, I got the Lobster Claw Nebula. Ignoring the bloated stars (3 minutes exposure times are too much for the new setup) I was highly impressed with how the Bubble Nebula came out.
2 hours total at 3-minute individual exposures and comparing this to the 9 hours above the difference is night and day. I'm tempted to pursue this target a little more and get more detail to see how I can bring out the Lobster Claw and Bubble Nebulas.
The bubble in the bubble nebula is more defined and the colours are more defined in this picture with the OIII peaking through at the central part of the nebula.
I've recently revisited this target (funny enough a few months after I took the above photos, with my new system) and took just 2 hours of exposure. But I made a slight difference in location and instead of the open cluster, I got the Lobster Claw Nebula. Ignoring the bloated stars (3 minutes exposure times are too much for the new setup) I was highly impressed with how the Bubble Nebula came out.
2 hours total at 3-minute individual exposures and comparing this to the 9 hours above the difference is night and day. I'm tempted to pursue this target a little more and get more detail to see how I can bring out the Lobster Claw and Bubble Nebulas.
The bubble in the bubble nebula is more defined and the colours are more defined in this picture with the OIII peaking through at the central part of the nebula.
- Scope – Celestron RASA 8
- Mount - Skywatcher EQ6 R Pro
- Guide scope – ZWO 30mm
- Guide Camera – ZWO ASI 120mm mini
- Control box – ZWO ASIAIR Pro
- Filter – IDAS NBZ Nebula Booster
- Starizona Filter drawer next to the camera sensor
- Fox Halo 96k power bank
- Dew heater with its own power bank on the guide scope
- All the data was stacked with DeepSkyStacker and Processed in Pixinsight. (Other software is available which is free and will is linked in the information tab)