NGC7023 & LBN487, the Iris Nebula

Star Cluster NGC7023 lighting up dust cloud LBN487. The main star lighting it all up is SAO19158. Without the star cluster, we probably wouldn't be able to see the dust cloud.

 

First attempt at LRGB-imaging with only 60 second sub-exposures due to passing clouds.

 

Shooting Location :

* 51° N 3° E

* bortle class 5 backyard

 

Object Information

* Type : Reflection Nebula

* Magnitude : 6.8

* Location (J2000.0): RA 21h 01m 36s / DEC +68° 10' 10"

* Approximate distance : 400 parsecs / 1.300 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 : 60sec

* Sensor Temperature : -20°C

* Gain : 111

* Offset : 10

* Light Frames :

> Baader Luminance : 80x

> Baader Red : 15x

> Baader Green : 15x

> Baader Blue : 15x

* Flat Frames :

> Baader L : 100x

> Baader R : 50x

> Baader G : 50x

> Baader B : 50x

* Dark Frames : 50x

* Bias Frames : 100x

* Total Integration Time : 2h05m

* Capture Date : 2018-09-07

 

Capture Software

* Sequence Generator Pro

* PHD2 Guiding

 

Processing Software

* PixInsight

* Adobe Photoshop

Done