NGC7293 Helix Nebula (tommy_nawratil)

Celestial hemisphere: Southern · Constellation: Aquarius (Aqr) · Contains: Helix nebula · NGC 7293 · PK036-57.1

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NGC7293 Helix Nebula

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NGC7293 Helix Nebula

The Helix strikes the Zenith in Namibia, so I took the advantage to try a photo in LRGB Ha and OIII channels, using an 8" f/4 Newtonian and ASI1600MMC in the south observatory of your Viennese club WAA. 28+14+12+14 x3min subframes LRGB and 24+23 x3min subframes Ha and OIII. Yes, 3min only each, ASI at zero gain, barely background limited in Namibia. ;-)

Presented are a crop on the main part of the Helix and its delicate interior structures, a 66% sized full field showing the outer portions in Ha alsong with some field galaxies, an annotated version, and a blink between Ha and OIII frames. How different the nebula looks in these channels!

Structures are enhanced a bit mostly by PixInsights HDR compression tool, only a little sharpening. The LRGB mix is just enhanced by NB in the weaker parts, and part of NB is used as a Luminance enhancement in the respective color channels.

Final
Original
B
C
D

B

Description: full field

Uploaded: ...

C

Description: full field annotated

Uploaded: ...

D

Description: blink H-Alpha and OIII frames

Uploaded: ...

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Status	Advanced success
Started	...
PixInsight job	MIC8055J4VCEO7TBWNHP3PI3M5OTKGUD
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	22h29m40s.44
RA (top/left)	22h30m22s.55
RA (top/right)	22h30m41s.38
RA (bottom/right)	22h28m58s.51
RA (bottom/left)	22h28m39s.30

Dec (center)	-20°50′17″.9
Dec (top/left)	-21°08′01″.0
Dec (top/right)	-20°35′54″.4
Dec (bottom/right)	-20°32′34″.6
Dec (bottom/left)	-21°04′40″.3

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NGC7293 Helix Nebula

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