SH2-240 (dual-narrowband and mono combination) (Torben van Hees)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: 125 Tau · 26 Aur · LBN 818 · LBN 822 · NGC 1996 · PGC 135909 · PGC 135911 · PGC 135914 · PGC 135915 · PGC 135916 · PGC 135923 · PGC 135929 · PGC 135942 · PGC 136036 · PGC 136037 · PGC 138818 · PGC 169019 · PGC 169031 · PGC 169032 · PGC 1758237 · PGC 17649 · PGC 17886 · PGC 17982 · PGC 18019 · PGC 18050 · PGC 1845545 · PGC 1846016 · PGC 1897555 · PGC 2820086 · Sh2-240 · And 2 more.

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SH2-240 (dual-narrowband and mono combination)

Link: https://astro.van-hees.name

Powered byPixInsight

SH2-240 (dual-narrowband and mono combination)

Link: https://astro.van-hees.name

The supernova remnant SH2-240 (or Simmeis 147) is a faint, large supernova remnant with an extent of about 140 light years at a distance of 3000 light years. Its apparent size is almost 3°. About 40000 years ago its progenitor star exploded in a supernova. The neutron star that remains from its progenitor star has been identified as a central pulsar.

This is a faint object, and due to its size I have only rather small optics that fit it. This was a test to see if the mono setup could pull ahead of the OSC one. But despite the smaller filter bandpass (6nm vs 10nm), the slightly larger aperture, faster optics and slightly higher Ha QE of the QHY294/Samyang, the much bigger sensor and large pixels of the Askar 300/TS 24AC combination won out. In the final integration, the mono data only contributed about 17% (as measured by its weight in the final integration).

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Status	Advanced success
Started	...
Astrometry.net job	7292400
PixInsight job	X6JOLIVZXOCR59C1YGZ9RKS1FFXPCRG8
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h40m24s.44
RA (top/left)	05h42m31s.70
RA (top/right)	05h54m48s.19
RA (bottom/right)	05h38m10s.31
RA (bottom/left)	05h26m23s.90

Dec (center)	+28°00′43″.1
Dec (top/left)	+24°33′34″.9
Dec (top/right)	+29°29′00″.3
Dec (bottom/right)	+31°27′52″.9
Dec (bottom/left)	+26°26′46″.6

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SH2-240 (dual-narrowband and mono combination)

SH2-240 (dual-narrowband and mono combination)

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SH2-240 (dual-narrowband and mono combination)

SH2-240 (dual-narrowband and mono combination)

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