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
Getting plate-solving status, please wait...

Ball of Scarlet Lightening (Sh2-240, Simeis 147, SNR G180. 0-01.7)

Technical card

Resolution: 4563x3450

Dates:Nov. 25, 2019Dec. 27, 2019Dec. 30, 2019

Frames:
Astrodon B Gen 2 E-series 31mm: 30x30" (gain: 300.00) -15C bin 1x1
Astrodon G Gen 2 E-series 31mm: 30x30" (gain: 300.00) -15C bin 1x1
Astrodon Ha 3nm-31mm: 241x300" (gain: 300.00) -15C bin 1x1
Astrodon R Gen 2 E-series 31mm: 30x30" (gain: 300.00) -15C bin 1x1

Integration: 20.8 hours

Darks: ~30

Bias: ~50

Avg. Moon age: 11.22 days

Avg. Moon phase: 7.09%

Bortle Dark-Sky Scale: 4.00

Astrometry.net job: 3169182

RA center: 5h 38' 52"

DEC center: +27° 26' 13"

Pixel scale: 2.302 arcsec/pixel

Orientation: 113.539 degrees

Field radius: 1.829

Locations: Monterey Pines Observatory, Monterey, California, United States

Data source: Backyard

Description

Sharpless 2-240, known as the Spaghetti Nebula, is a large supernova remnant straddling the border between the constellations Auriga and Taurus. The glowing gas filaments cover nearly 3 degrees of the sky, a cloud of stellar debris that is about 150 light years across. The explosion occurred about 40,000 years ago, the light reaching Earth a few thousand years later. A spinning neutron star or pulsar is all that remains of the original star’s core.

This image is an HaRGB rendition. The data were collected over a four week period in November and December 2019, during three clear nights between rain storms. This is one of the faintest objects that I have attempted. Even coupling a fast OTA (WO GT 71 refractor reduced to 336mm FL and f/4.7), a sensitive camera (ZWO ASI1600MM Pro using 300 gain), and 300 second exposures produced very faint light subs. I found that I needed to collect more than more than 25 hours of Ha data to visualize the detail and control the noise in this object. I collected OII data as well, but the very uneven HFR of the subs diminished quality of an HaOIII version, so I settled on the HaRGB approach.

Comments

Author

GWLopez
Gary Lopez
License: None (All rights reserved)
4459
Like

Revisions

B

Crop to emphasize the SN structure

D

Bit of touch up

F

Shift in color temperature to improve SNR contrast with background.

G

Slightly cooler color temperature.

Sky plot

Sky plot

Histogram

Ball of Scarlet Lightening  (Sh2-240, Simeis 147, SNR G180. 0-01.7), 





    
        

            Gary Lopez