M51 Whirlpool Galaxy and NGC5194 (IDDAN)

Celestial hemisphere: Northern · Constellation: Canes Venatici (CVn) · Contains: HD117815 · IC 4277 · IC 4278 · M 51 · NGC 5194 · NGC 5195 · Whirlpool Galaxy

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M51 Whirlpool Galaxy and NGC5194

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M51 Whirlpool Galaxy and NGC5194

My first post in a long time as I have struggled with the used AP Starfire 155 EDT I procured last Spring to get round stars. I finally got the nerve to collimate the telescope as there was no other variable I could think of left to address. So I bought a refractor collimating eyepiece. Sure enough the eyepiece revealed I was far from collimated. I had been imaging with adjacent circles, not concentric, hence oblong stars LoL! It is very close to collimated now but great patience is required as every little turn changes things and the circles are small.

Also added the new adjustable Starizona field flattener yesterday. Half of these frames are without flattener, half with.

When the Moon is down in another few weeks hopefully I can update with all frames using only the flattener.

NINA Hocus Focus plug in reveals I have a super flat field now but still have a few microns of tilt. Will try to eliminate that as well.

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
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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	7081630
PixInsight job	KZVP8WUNP6XYX6R4B394HSHVOZOCYJKL
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	13h30m06s.277
RA (top/left)	13h27m36s.643
RA (top/right)	13h31m45s.647
RA (bottom/right)	13h32m36s.483
RA (bottom/left)	13h28m25s.654

Dec (center)	+47°14′20″.69
Dec (top/left)	+47°07′55″.41
Dec (top/right)	+46°54′19″.80
Dec (bottom/right)	+47°20′33″.36
Dec (bottom/left)	+47°34′15″.19

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Contribution Index (beta):

M51 Whirlpool Galaxy and NGC5194

M51 Whirlpool Galaxy and NGC5194

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Image Index:

Contribution Index (beta):

M51 Whirlpool Galaxy and NGC5194

M51 Whirlpool Galaxy and NGC5194

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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