Fish Head Nebula – IC 1795 – HS-HSO / RGB stars (12,4 h) (Thomas Ammann)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: HD14328 · HD14510 · HD14552 · HD14695 · HD14817 · HD15022 · HD15069 · HD15522 · HD15557 · HD15558 · HD15570 · HD15629 · IC 1795 · IC 1805 · LBN 642 · LBN 645 · LBN 646 · LBN 647 · LBN 648 · LBN 650 · LDN 1356 · LDN 1359 · LDN 1360 · LDN 1361 · LDN 1362 · LDN 1363 · LDN 1364 · LDN 1366 · LDN 1367 · LDN 1368 · And 3 more.

Powered byPixInsight

Fish Head Nebula – IC 1795 – HS-HSO / RGB stars (12,4 h)

Powered byPixInsight

Fish Head Nebula – IC 1795 – HS-HSO / RGB stars (12,4 h)

Very bright emission nebula, located at around 6000 LY, with in its heart the region NGC 896 which houses many young and massive stars, which illuminate all the space around (constellation of Cassiopeia).

The OIII radiation being relatively strong, also in the direction of Melotte 15 forming the center of the Hearth Nebula, the choice of the right false color composition is difficult, linked to a strong gradient in luminance.

The HSO image has gained precision with a luminance layer essentially composed of the master Ha. Total duration : 12,6 h.

The PIXINSIGHT 'Staralignment - Thin Plat Splines' feature greatly facilitated the blending of images from both optics (Tak FSQ-106 and TEK 140), with perfectly precise stars right up to the edge of the images.

GraXpert has contributed to a more homogeneous image background, but this application requires very careful positioning of the dot grid on dark spaces, otherwise the correction is clearly too strong.

BlurXterminator, version 4 helps a little, but if the quality of the images, respectively of the stars is good, its contribution is minimal.

NoiseXterminator seems to me to be the most effective R-C function: very impressive how the details are saved after processing the noise reduction, if the quality of the images is good.

After a few nebulae at very low light, the processing of the Fish head was a little easier, but I really like the composition of the Ha - OIII - SII layers, and the gain in precision by Ha after the color processing.

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	8998301
PixInsight job	2GP6K7PHAO9YOCX7WQ5ED4Q78U58XWLH
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	02h26m13s.160
RA (top/left)	02h35m11s.165
RA (top/right)	02h28m10s.570
RA (bottom/right)	02h16m53s.300
RA (bottom/left)	02h24m25s.540

Dec (center)	+62°01′21″.86
Dec (top/left)	+61°25′24″.96
Dec (top/right)	+63°13′25″.78
Dec (bottom/right)	+62°35′10″.18
Dec (bottom/left)	+60°49′25″.85

Image Index:

Contribution Index (beta):

Fish Head Nebula – IC 1795 – HS-HSO / RGB stars (12,4 h)

Fish Head Nebula – IC 1795 – HS-HSO / RGB stars (12,4 h)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

Fish Head Nebula – IC 1795 – HS-HSO / RGB stars (12,4 h)

Fish Head Nebula – IC 1795 – HS-HSO / RGB stars (12,4 h)

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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?

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