A fast lens on Cassiopeia in Ha (Lee)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: Bubble Nebula · IC 1805 · IC 1831 · IC 1848 · NGC 281 · NGC 7635 · The constellation Cassiopeia (Cas) · The star Caph (βCas) · The star Navi (γCas) · The star Ruchbah (δCas) · The star Schedar (αCas) · The star εCas · The star ζCas · The star ηCas · The star ηPer · The star θCas · The star κCas

Powered byPixInsight

A fast lens on Cassiopeia in Ha

Powered byPixInsight

A fast lens on Cassiopeia in Ha

I've recently uploaded some images from the Cassiopeia region so wanted to complement these with a view of the whole area. On the 183MM lens this is quite a challenge but here is a 24 pane mosaic in Ha - just 5 minutes per pane with the Samyang 135 at F2. It's been resampled to 20% original size to increase SNR and be more enjoyable viewing the big picture.

In reality this was 2 hours of integration but took around 3 hours or so to shoot as the mosaic planner had the panes numbered in such a way that as it was swapping, some would require a meridian flip and then back again. One pane just would not plate solve on the ASIAIR Pro so had to shoot that one manually. Thankfully it all stitched together easily in APP.

Captured with the ASIAIR Pro, calibrated and stacked in APP then processed a little in PixInsight

Final
Original
B
C
D

B

Description: A smaller version (10% of original) annotated in PixInsight.

Uploaded: ...

C

Description: Crop 1 of the full mosaic resampled 50%

Uploaded: ...

D

Description: Crop 2 of the full mosaic resampled 50%

Uploaded: ...

Samyang 135 f/2
UK Astro-Imaging

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 failed
Started	...
Astrometry.net job	5323327
PixInsight job	9I6NL5NFZOOZSKH74VD9MCH3LY0EHIPV
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

Image Index:

Contribution Index (beta):

A fast lens on Cassiopeia in Ha

A fast lens on Cassiopeia in Ha

Equipment

Acquisition details

Description

Comments

Revisions

B

C

D

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

A fast lens on Cassiopeia in Ha

A fast lens on Cassiopeia in Ha

Equipment

Acquisition details

Description

Comments

Revisions

B

C

D

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