M103 (David Moore)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD236750 · HD236754 · HD236762 · HD236767 · HD236783 · HD236789 · HD236800 · HD236810 · HD8906 · HD8965 · HD9022 · HD9136 · HD9145 · HD9146 · HD9154 · HD9167 · HD9311 · HD9365 · HD9518 · HD9634 · HD9682 · HD9696 · HD9737 · HD9788 · HD9926 · HD9973 · M 103 · NGC 581 · PGC 137811 · PGC 137839 · And 11 more.

Powered byPixInsight

M103

Powered byPixInsight

M103

This was only supposed to be a quick test while the clouds rolled in on some modifications I made to my 130PDS focusser which leaves a few things to be desired. It only took 20 mins exposure and about the same processing and I quite like it. There are so many stars. It does show the law of diminishing returns as my last image took about 32 hrs exposure and lots of time processing.
As a matter of interest the focusser works well but it has 2 different diameters with the inner end being the larger. This produces slop and variable tilt as it is impossible to centralize it. This is despite the coma corrector being held in place with 3 screws impinging on a metal clamp.
I used very strong tape to build up the diameter where it was greater to reduce slop but could not remove all of it so I inserted 3 off 4 thou feeler gauge pieces 120 degrees apart inside the tape to build up the diameter and make my coma corrector a sliding fit in the focusser. Unfortunately I still have 10% tilt so need to address that. Tilt varies somewhat during the night which presumably means the whole optical train in not rigid.

Original
C
E
Final
G

Cooled Color Cams
ZWO ASI 2600MC PRO

Please note: The following tables are updated every 24 hours.

Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

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.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	8693752
PixInsight job	ZXHFZLRQ638UFJTURGGDCNODSAWBRIPF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	01h33m58s.82
RA (top/left)	01h37m03s.63
RA (top/right)	01h39m56s.93
RA (bottom/right)	01h30m41s.50
RA (bottom/left)	01h28m17s.40

Dec (center)	+60°34′44″.2
Dec (top/left)	+59°35′05″.0
Dec (top/right)	+61°21′47″.5
Dec (bottom/right)	+61°34′14″.8
Dec (bottom/left)	+59°46′45″.8

Image Index:

Contribution Index (beta):

M103

M103

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

M103

M103

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

Delete this revision?

Delete this revision?

Delete this revision?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information