Witch Head Nebula - 15 minute total exposure time with Canon 400mm F2.8 (145mm objective) telephoto lens (Rick Evans)

Celestial hemisphere: Southern · Constellation: Eridanus (Eri) · Contains: 65 psi Eri · IC 2118 · LBN 959 · NGC 1752 · NGC 1797 · NGC 1799 · NGC 1909 · PK205-26.1 · The star ψEri · Witch Head nebula · the Witch Head Nebula

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Witch Head Nebula - 15 minute total exposure time with Canon 400mm F2.8 (145mm objective) telephoto lens

February 23, 2022. Canon 400mm F2.8 (145mm objective) telephoto on full spectrum Canon EOS 60D APS-C DSLR. Sky Watcher EQ6-R Pro mount. No filters. ISO 800. Only 30 sub exposures taken, at 30 seconds each. Total imaging time was only 15 minutes. Bortle 5-6 sky. No moon during session. Sky was clear but transparency rapidly degraded to nearly nil. I had power strip problems (loose connection) and then my camera power cable (didn't use a battery) became entangled around one of my mount axes, freezing tracking until I figured out the problem in the dark.

So, a long imaging session was planned but only a 15 minute total imaging time is what actually happened. I was surprised to get any result at all. I'd always been told that in Bortle 5-6, the nebula required many hours of imaging to get any sort of image. But the Canon lens is fast.

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Status	Advanced success
Started	...
Astrometry.net job	5525549
PixInsight job	8I97Y67NG4C4VB3SKBACBNGRES4DMQT1
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h04m39s.20
RA (top/left)	05h00m54s.98
RA (top/right)	05h08m17s.40
RA (bottom/right)	05h08m21s.36
RA (bottom/left)	05h01m01s.78

Dec (center)	-07°13′15″.7
Dec (top/left)	-08°25′20″.5
Dec (top/right)	-08°26′24″.6
Dec (bottom/right)	-06°01′00″.8
Dec (bottom/left)	-05°59′57″.7

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Witch Head Nebula - 15 minute total exposure time with Canon 400mm F2.8 (145mm objective) telephoto lens

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Witch Head Nebula - 15 minute total exposure time with Canon 400mm F2.8 (145mm objective) telephoto lens

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