NGC6888 The Crescent Nebula 11-July-23

Target

NGC6888 The Crescent Nebula

 

The Crescent Nebula (NGC 6888) is an emission nebula in the constellation Cygnus.

It was formed by the stellar winds of Wolf-Rayet star WR 136 colliding with and energizing

the slower moving winds ejected by the star when it became a red giant around 250,000 to 400,000 years ago

Distance - about 5000 light years from earth.

 

Gear:

Mount: ZWO AM5

Main Cam: ZWO ASI294MC Pro @ gain 121 and 14F

Guide Cam: ZWO ASI120MM Mini with ZWO 30mm f/4 scope

Lens: Sigma 150-600 @ 500

Filter: Antlia ALP-T 5nm Ha and Oiii

 

Acquisition:

48 5 min exposures total of 4.0 hours

Location: Rural area just west of Houston outer loop

Bortle: 4/5

Moon: 34% below horizon for most of session

 

Processing:

Pixinsight WBPP

Pixinsight SPCC, SCNR

Pixinsight DBE

PixInsight BlurXTerminator

Pixinsight NoiseXTerminator

Pixinsight StarXterminator

Pixinsight EZ Soft Stretch

PhotoShop/ACR selective colors

Pixinsight Curves, MMT, EZ Star Reduction, recombine stars

Done