NGC 2736 , the Pencil Nebula

This is NGC 2736 is a Supernova Remnant which is part of the larger Vela XYZ supernova remnant region. It is located in the southern constellation of Vela. It is the result of a type II supernova that occurred 11,000 years ago. (NOIRLAB)

It is also known as the Pencil Nebula due to its iconic tapering shape.

This image is a narrowband image (HSO). The table below shows the RGB channel assignments:

Channel --> Narrowband

Red --> Hydrogen Alpha (656.3 nm)

Green --> Sulfur II (672 nm)

Blue --> Oxygen III (500.7 nm)

Bottom line, this mapping communicates the composition of different regions in the nebula. It does not represent the way the nebula appears to our eyes.

The stars are narrowband (HOO).

Image processed by Andrew Macica, original data from Telescope Live.

Imaging Details:

Observatory: Rio Hurtado Valley, Chile

Telescope: Planewave CDK24

Aperture: 610 mm (24 inches), f/6.5

Focal Length: 3962 mm

Camera: FLI PL 9000 CCD

Filters: H-alpha, SII, OIII

Total Exposure: 23 hours 20 min.

Image Processing:

PixInsight 1.8.9-3 Ripley (x64);

BlurXTerminator, NoiseXTerminator, StarXTerminator (RC Astro);

Adobe Photoshop 25.12.4;

Adobe Lightroom Classic 15.1.1

Instruction on PixInsight from Adam Block Studios.