Sh2-240 Spaghetti Nebula (Mau_Bard)

Sh2-240 Spaghetti Nebula

This image has been taken with my relatively new Sigma 135 mm + TS2600-G2 setup, during one single night in January 2024. The Sigma has an good coma control, that added to the recently acquired capabilities of BlurX, allows to get good stars even at such short focal. I used x2 drizzle compensate for the structural under-sampling of this configuration, and avoid "sqare" stars.

Sh2-240 Spaghetti Nebula
Galactic Coordinates: (180.2°, -1.3°)
The majestic Spaghetti Nebula (Sh2-240, Simeis 147, LBN822, SNR 180.0-01.7, Shajn 147) is a faint supernova remnant that occupies a large portion of the sky, with a size of 10 x 6 full moons. It lays across the Auriga-Taurus Border.
Because of its extreme faintness, Sh2-240 was discovered only in 1952 at the Crimean Astrophysical Observatory by Grigory Shajn.
The stellar debris is estimated to be 150-160 ly wide at a distance of 3000 ly (920 pc).
The supernova explosion happened about 40000 years ago (but there are different estimates) and left behind not only the expanding remnant but also the pulsar (spinning neutron star) PSR J0538+2813, discovered in 1966 and emitting a strong radio signal, whose position is indicated in the annotated version of the image. The Pulsar rotation period is 149 ms.

Sh 2-242
Galactic Coordinates: (182.36°, 0.18°)
According to Avedisova, this HII region is ionised by the B0 V class star BD +26 980. It lies at 2700 pc therefore it should be located in the Perseus arm.

PN 181+00.1, PU1
This planetary nebula, visible at left of Sh2-240, is located, according to Simbad, at about 2000 pc, and was discovered by Purgathofer in 1978.

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Title: Closeup Starless Annotated with Moon

Description: Moon in correct scale to Sh2-240

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Status	Advanced success
Started	...
Astrometry.net job	9121764
PixInsight job	MHAUETV5P3CW52U97RO62SGRLDRNDFV3
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h42m09s.24
RA (top/left)	05h56m50s.68
RA (top/right)	05h27m30s.59
RA (bottom/right)	05h28m02s.31
RA (bottom/left)	05h56m13s.31

Dec (center)	+27°59′32″.7
Dec (top/left)	+30°03′52″.3
Dec (top/right)	+30°04′46″.4
Dec (bottom/right)	+25°49′29″.3
Dec (bottom/left)	+25°48′40″.7

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Sh2-240 Spaghetti Nebula

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