Ghost of Jupiter Nebula and surrounding dark nebula (KiwiAstro)

Celestial hemisphere: Southern · Constellation: Hydra (Hya) · Contains: Ghost of Jupiter · NGC 3242 · PGC 155137 · PGC 155154 · PGC 155173 · PGC 155187 · PGC 155190 · PGC 155202 · PGC 155215 · PGC 155220 · PGC 155279 · PGC 30602 · PGC 30683 · PGC 3094095 · PGC 855490 · PGC 856773 · PGC 857289 · PGC 857488 · PGC 858376 · PGC 859104 · PGC 859218 · PGC 859319 · PGC 859707 · PGC 860076 · PGC 860950 · PGC 861527 · PGC 862180 · PGC 864525 · PGC 864622 · PGC 864743 · And 14 more.

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Ghost of Jupiter Nebula and surrounding dark nebula

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Ghost of Jupiter Nebula and surrounding dark nebula

Ghost of Jupiter and surrounding nebulae about 1400 to 2500 LY distance - discovered in 1785.

Shorter length exposures were taken for the "eye" and longer ones for the surrounding dark nebula.

Took about 24 hours to process this tough target given the brightness of the eye vs the dark surrounding nebula. Attempted to use HDR Composition and/or HDR Multiscale Transform to bring the bright eye together with the dark nebula but to no avail without over exposure of the "eye". However, was able to HDR composition for 5 s& 10s subs, and then the 180s & 300s UHC subs. For the O3 filter, unable to do so.

Independently stretched using Arcsinh or Masked Stretch the 5s & 10s subs from the the 180s & 300s for the UHC filter and indepently stretched the O3 5s subs from the 300s subs.

Then using layers and masks in Photoshop able to bring it all together.

Although using an OSC, I gave an O3 filter a try and the O3 subs made a significant difference to the detail and colour for this object.

Imaged with APT

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Status	Advanced success
Started	...
Astrometry.net job	4307317
PixInsight job	J3GM43S7ZFSZJ4L3OU8QCMHF6TEZ6C9H
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	10h25m03s.71
RA (top/left)	10h27m07s.50
RA (top/right)	10h27m37s.81
RA (bottom/right)	10h23m00s.85
RA (bottom/left)	10h22m28s.46

Dec (center)	-18°44′40″.4
Dec (top/left)	-19°30′05″.1
Dec (top/right)	-18°04′45″.8
Dec (bottom/right)	-17°59′02″.5
Dec (bottom/left)	-19°24′21″.5

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Ghost of Jupiter Nebula and surrounding dark nebula

Ghost of Jupiter Nebula and surrounding dark nebula

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Ghost of Jupiter Nebula and surrounding dark nebula

Ghost of Jupiter Nebula and surrounding dark nebula

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