Helix Nebula NGC 7293 - OSC with an F4.5 Newt on a Dobson in 30 mins! (Mike Dobres)

Celestial hemisphere: Southern · Constellation: Aquarius (Aqr) · Contains: HD213056 · HD213069 · Helix Nebula · NGC 7293

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Helix Nebula NGC 7293 - OSC with an F4.5 Newt on a Dobson in 30 mins!

Revision title: Pixinsight SPCC processed

Acquisition type: Lucky imaging

Powered byPixInsight

Helix Nebula NGC 7293 - OSC with an F4.5 Newt on a Dobson in 30 mins!

Revision title: Pixinsight SPCC processed

Acquisition type: Lucky imaging

The remnants of a star 655 light years from Earth, this beautiful planetary nebula rises above the hill just South of my house just after midnight. At 25 arcminutes, it's almost the same apparent dimension as the moon. But with a radius of 2.87 light years - it's obviously considerably larger!

Only needed 30 minutes with an F4.5 Newtonian and an L- eXtreme filter, for this capture. Would like to do longer, but the big old wooden Dobson mount is not always up to it. Using the field rotator helped keep things square. Will try and see if I can add brighter stars with a UV-IR filter.

Original and revisions B and C, September 2022. Processed in Startools and Lightroom.

Revision D, May 2023:: Decided to test some of my newly acquired Pix skills on this image from last year - with a touch of Startools repair at the end. 401 of 473 x 4 sec frames stacked. The old Dobs tracking is lousy!

Original
B
C
Final
D

B

Title: Capped green

Description: Cut back the dominant green in the core - in Startools color module

Uploaded: ...

C

Title: Photoshop Curves -Blue and Red

Description: Tried to increase the outer halo red, and increase the blueness of the core.

Uploaded: ...

D

Title: Pixinsight SPCC processed

Description: Blink-WBPP-DBE-SPCC-BX-NX--HT-Curves - stars rounded with Startools Repair module and Filter module used to enhance Ha and O3 colors.
Discarded 50 of 473 with blink. Then had to really play around with the registration and local normalization settings in WBPP, but finally could stack, register and normalize 401 frames.

Uploaded: ...

Duo-band, Tri-band, and Quad-band Imaging
StarTools
Dobson imagers
Optolong L-eXtreme filter
Astrophotography in Spain
Astrophotography with Dobson
Short exposures DSO

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Status	Advanced success
Started	...
Astrometry.net job	7681794
PixInsight job	VEUK7RWPJSDDQKLQT91VBSNR9GH28W5Q
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	22h30m05s.172
RA (top/left)	22h28m26s.886
RA (top/right)	22h30m47s.240
RA (bottom/right)	22h31m43s.556
RA (bottom/left)	22h29m23s.271

Dec (center)	-20°53′40″.55
Dec (top/left)	-20°54′36″.37
Dec (top/right)	-21°14′29″.75
Dec (bottom/right)	-20°52′39″.90
Dec (bottom/left)	-20°32′51″.15

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Helix Nebula NGC 7293 - OSC with an F4.5 Newt on a Dobson in 30 mins!

Revision title: Pixinsight SPCC processed

Helix Nebula NGC 7293 - OSC with an F4.5 Newt on a Dobson in 30 mins!

Revision title: Pixinsight SPCC processed

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Helix Nebula NGC 7293 - OSC with an F4.5 Newt on a Dobson in 30 mins!

Revision title: Pixinsight SPCC processed

Helix Nebula NGC 7293 - OSC with an F4.5 Newt on a Dobson in 30 mins!

Revision title: Pixinsight SPCC processed

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Acquisition details

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D

Sky plot

Histogram

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