Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Contains:  NGC 255, NGC 246
Getting plate-solving status, please wait...

NGC 246 - The Skull Nebula

Technical card

Resolution: 3918x2612

Dates:Nov. 10, 2017

Frames: 111x900"

Integration: 27.8 hours

Avg. Moon age: 21.75 days

Avg. Moon phase: 54.18%

Astrometry.net job: 1805339

RA center: 11.755 degrees

DEC center: -11.841 degrees

Pixel scale: 0.803 arcsec/pixel

Orientation: 30.104 degrees

Field radius: 0.525 degrees

Description

The Skull Nebula is located in the constellation Cetus. It is a planetary nebula discovered by William Herschel in 1785. From our vantage point, it has an angular resolution of 3.7 arcmin. The estimated diameter is about 2.3 light years, and is at a distance of 1,600 light years from our planet. The listed magnitude of the nebula is around 11th magnitude, so is has a fairly low surface brightness. Quite often, visual observers can find the foreground stars overpowering. The central star is fairly bright at 11.8 magnitude. The eastern limb of the nebula is brighter suggesting that it is interacting with the interstellar medium. I love how some objects in the cosmos have bow waves reflecting the dynamics of the interstellar medium.

I tried to capture the translucent shell of this planetary nebula. It reminds me of a crystal sphere containing something wonderful at its centre. The teal and red colours within add a nice depth to the image. The galaxy in the top left is NGC 255, a barred spiral galaxy, a distance of 59.16 million light years away, give or take 5 million for an estimate.

The image was captured between Sept-November 2017. I used 6 filters to create the image. Red, Green, Blue, Luminance, Ha, and OIII.

Exposure Details:
62 X 900 Bin 1X1 Lum
25 X 450 Bin 2X2 Red
22 X 450 Bin 2X2 Green
20 X 450 Bin 2X2 Blue
5 X 900 Bin 1X1 Ha
10 X 900 Bin 1x1 OIII

Comments

Author

trobison
Terry Robison
License: None (All rights reserved)
2564
Like

Sky plot

Sky plot

Histogram

NGC 246 - The Skull Nebula, 





    
        

            Terry Robison