The Crarb Narb (Mike Hamende)

Celestial hemisphere: Northern · Constellation: Taurus (Tau) · Contains: Crab nebula · HD245010 · LBN 833 · M 1 · NGC 1952 · Sh2-244

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The Crarb Narb

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The Crarb Narb

The image title is a bit of an inside joke. I pulled the newtonian inside for what I hope is the last modification it will need. I noticed that the tube underneath the focuser could flex which made the imaging train sag in different directions while slewing around. I had some tube rings laser cut from aluminum and turned some dowel nuts on the lathe. I put a few pictures in the revisions. The focuser is much more stable now and I'm hoping it will hold collimation at any angle.

B

Title: Secondary mirror alignment tool

Description: I've also made a tool for aligning the rotational axis of the secondary to the focuser. The tool is placed in the focuser and the plate is pushed in until it is a mm or two from the secondary. You then simply ensure that the bottom edge of the plate and the reflected edge are parallel and you've got simple alignment.

Uploaded: ...

C

Description: Showing the secondary rotation aligned.

Uploaded: ...

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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Status	Advanced success
Started	...
Astrometry.net job	7176225
PixInsight job	6CW9J7VIKG9VIW274WMLNNOCV65OG9N0
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	05h34m32s.230
RA (top/left)	05h35m25s.955
RA (top/right)	05h35m28s.508
RA (bottom/right)	05h33m37s.925
RA (bottom/left)	05h33m35s.721

Dec (center)	+22°00′45″.91
Dec (top/left)	+21°47′40″.51
Dec (top/right)	+22°13′16″.64
Dec (bottom/right)	+22°13′48″.100
Dec (bottom/left)	+21°48′13″.43

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The Crarb Narb

The Crarb Narb

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Image Index:

Contribution Index (beta):

The Crarb Narb

The Crarb Narb

Equipment

Acquisition details

Description

Comments

Revisions

B

C

Sky plot

Histogram

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