M 1 - Crab Nebula

M 1, the Crab Nebula, is a supernova remnant in the constellation Taurus, approximately 6,500 light years from Earth. It is the first object identified to be the result of a star explosion. While M 1 was first recorded in 1731 by British astronomer John Bevis, it was formally catalogued by Charles Messier as the first object in his catalog of bright non-cometary objects in 1758.

Astronomers have determined that the supernova remnant is expanding. Working backwards they calculated the origin date, matching explosion oservations from Chinese and Native American records. At the center of the nebula is a pulsar, a very small but high energy neutron star with a spin rate of 30 times per second. 

This image was shot with our Officina Stellare RiLA 600 f/5 telescope using an FLI ML 16200 CCD camera. 6 minute subexposures were shot through Hydrogen Alpha, Oxygen 3 and Sulfur 2 filters, which were mapped to Green, Blue and Red respectively to create a false color image in the Hubble palette. 191 total exposures were taken, totalling more than 22 hours. Addtionally, a series of 300 30-second images in Red, Green and Blue were taken to capture true star colors.

Imaged and processed by the SC Observatory team: Mike Selby, Andy Chatman, Stefan Schmidt.

Object details

Supernova Remnant in Taurus

Right Ascension: 05h 34m 31.94s

Declination: +22° 00′ 52.2″

Magnitude: 8.4

Moon Age Average: 19.20 days

Moon Phase Average: 73.93 %

Imaging Setup


SC Observatory, Central Thailand

Mar 2, 2018, Mar 3, 2018, Mar 4, 2018, Mar 5, 2018, Mar 6, 2018, Mar 7, 2018, Mar 8, 2018, Mar 11, 2018 and Mar 12, 2018
Officina Stellare RiLA 600
Focal Length:
3000 mm
Paramount Taurus 600
FLI ML 16200
Image Scale:
Imaging Software:


Processing Software:

Adobe Photoshop

PixInsight 1.8

Exposure Detail

Filter Filter Brand Bin Qty Exposure
R Astrodon N/A 100 30
G Astrodon N/A 100 30
B Astrodon N/A 100 30
Ha Astrodon N/A 107 360
OIII Astrodon N/A 44 360
S2 N/A N/A 47 360

Total Exposure Time

22 hours, 18 minutes

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