NGC7635 - The Bubble Nebula

Also known as :

* LBN 549

* Sh 2-162

* IC 11

 

From Wikipedia :

The Bubble nebula 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. 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. The radius of the bubble is estimated between 3 and 5 lightyears.

 

HSO-combined

R : Ha

G : SII

B : OIII

 

Shooting Location :

* 51° N 3° E

* bortle class 5 backyard

 

Object Information

* Type : Emission Nebula

* Magnitude : 11.0

* Location (J2000.0): RA 23h 20m 45s / DEC +61° 12' 42"

* Approximate distance : 2.175 to 3.400 parsecs / 7.100 to 11.000 lightyears

 

Hardware

* Mount : Celestron CGX

* Imaging Scope : Sky-Watcher Explorer 150PDS

* Imaging Camera : ZWO ASI 183MM

* Filter Wheel : ZWO EFW 7*36mm + Baader Ha 7nm, Baader OIII 8.5nm + Baader SII 8.5nm + Baader LRGB

* Coma Corrector : Baader MPCC III

* Guide Scope : Sky-Watcher StarTravel 80

* Guide Camera : ZWO ASI 120MM

 

Exposures

* Single Exposure Length : 300s

* Sensor Temperature : -20°C

* Gain : 111

* Offset : 10

* Light Frames :

> Baader Ha : 72

> Baader OIII : 75

> Baaser SII : 51

* Bias Frames : 500

* Dark Frames : 100

* Flat Frames : 100/channel

* Flat Dark Frames : 50/channel

* Total Integration Time : 16h30m

* Capture Dates :

> 2018-09-13 : Ha

> 2018-09-26 : SII

> 2018-10-05 : OIII

 

Capture Software

* Sequence Generator Pro

* PHD2 Guiding

 

Processing Software

* PixInsight

* Adobe Photoshop

* Noiseless

Done