LDN 1235, 1251 and friends (Robin Livermore)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: 16 Cep · 31 Cep · HD208002 · HD208509 · HD209258 · HD209610 · HD210476 · HD210511 · HD210615 · HD210806 · HD211300 · HD211771 · HD211879 · HD212955 · HD213021 · HD214511 · HD214710 · HD215038 · LBN 535 · LBN 541 · LBN 546 · LBN 558 · LDN 1235 · LDN 1242 · LDN 1243 · LDN 1251 · The star 16 Cep · The star 31 Cep · VdB149

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LDN 1235, 1251 and friends

Powered byPixInsight

LDN 1235, 1251 and friends

This is a two panel mosaic containing the shark nebula and something which to me looks like dirty exhaust fumes! The dark nose of the shark is LDN1235 and the dark nebula seeming to cause the fumes is LDN1251. Various LBN designations for the dust, and then the two reflection nebulae at top and bottom of the shark are LBN 546 and LBN541 / VdB 149.

I'm pretty close to a flat field with my RASA, and rotating is not an option with this set up, so this was a bit of a struggle to fit in with my rotation, even with the two panels, but I think it sort of works like this.

The mix of 30 second exposures (lower panel) and 20 second exposures (upper panel) was an accident. I thought I'd just programmed 20 seconds for another target, but managed to muck this up when doing that. However, pleased to note that with similar total times for each panel (I use timings, not exposure numbers) I really can't tell the difference.

Original
B
Final
C

B

Description: re-processed with starless approach to DBE to improve gradient removal

Uploaded: ...

C

Description: slight push to contrast

Uploaded: ...

Celestron RASA

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Status	Advanced success
Started	...
Astrometry.net job	8519714
PixInsight job	PMGQRE8TSFS14Q64IJGIJ0HDPMKCCZHC
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h15m37s.55
RA (top/left)	22h45m42s.23
RA (top/right)	21h47m46s.78
RA (bottom/right)	21h50m37s.90
RA (bottom/left)	22h38m14s.20

Dec (center)	+74°12′40″.1
Dec (top/left)	+75°36′15″.1
Dec (top/right)	+75°48′08″.4
Dec (bottom/right)	+72°36′11″.5
Dec (bottom/left)	+72°26′21″.4

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LDN 1235, 1251 and friends

LDN 1235, 1251 and friends

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LDN 1235, 1251 and friends

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