M 1 - Crab Nebula (Mirosław Stygar)

M 1 - Crab Nebula

Acquisition type: Lucky imaging

This time, I would like to share my astrophotographic debut of 2024, and its main subject is the Crab Nebula.

The Crab Nebula (catalog designations: M 1, NGC 1952, Taurus A, LBN 883, Sh2-244), opening the famous Charles Messier catalog, is the remnant of a supernova and simultaneously a so-called plerion, or synchrotron nebula, powered by the immense energy of a pulsar. Discovered in 1731 by the English astronomer John Bevis, its colloquial name, simply "Crab," was coined by another renowned astronomer, William Parsons (Lord Rosse). Using his telescope, the famous "Leviathan of Parsonstown," he sketched this object, and what he drew resembled a common crab.

With an apparent magnitude of 8.4, comparable to the size of Saturn's moon Titan, it is not visible to the naked eye but can be observed using binoculars under favorable conditions. The nebula lies in the Perseus Arm of the Milky Way galaxy, at a distance of about 2.0 kiloparsecs (6,500 light-years) from Earth. It has a diameter of 3.4 parsecs (11 light-years), corresponding to an apparent diameter of about 7 arcminutes, and is expanding at a rate of about 1500 kilometers per second, or 0.5% of the speed of light. At the center of the nebula is the Crab Pulsar, a neutron star with a diameter of 28–30 kilometers and a spin rate of 30.2 times per second, emitting pulses of radiation from gamma rays to radio waves. At X-ray and gamma-ray energies above 30 keV, the Crab Nebula is typically the brightest persistent gamma-ray source in the sky.

The image is a composite of two sessions taken in a short-exposure technique. After discarding weaker frames, the final version consists of 11747 one-second frames for RGB and 4074 two-second frames with a Baader H-alpha 32 nm filter. All captured with the TS 200/1000 ONTC telescope and a Player One camera with an IMX585MC sensor.

Poland

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Status	Basic success
Started	...
Astrometry.net job	9146206
PixInsight job	n/a
PixInsight queue size	n/a
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M 1 - Crab Nebula

M 1 - Crab Nebula

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M 1 - Crab Nebula

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