California Nebula (Paul Macklin)

Celestial hemisphere: Northern · Constellation: Perseus (Per) · Contains: 46 ksi Per · California Nebula · IC 2005 · LBN 752 · LBN 756 · LDN 1462 · LDN 1463 · LDN 1464 · LDN 1469 · Menkib · NGC 1499 · Sh2-220 · The star ξPer

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California Nebula

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California Nebula

Just a fast test without calibration frames! Honestly, I'm surprised this exploratory shot turned out so well!

Extracted and stacked Ha and [OIII] separately, removed light pollution from each separately, then combined in HOO2 in AstroPixelProcessor with [OIII] at 2x. As always, save as 16 bits-per-pixel integers with stretching before moving on to photoshop.

No star reduction this time around.

Here's a brief snapshot on how I postprocess after AstroPixelProcessor:

1. Photoshop
* Rotate and crop down to 3000x3000
* Auto-tone
* Auto-contrast
* Auto-color (not always--look at impact on colors)
* Brightness/contrast (auto, then manually adjust)
* Levels (auto, then manually adjust. midtone never above 1.2)
* Curves (try auto, but generally something like medium contrast)
* Save
2. Topaz denoise
* Severe profile, but see if you can reduce settings
3. Photoshop
* Auto-tone
* Auto-contrast
* Save

Nebulas - Widefield and Mosaics

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	5049833
PixInsight job	M3GAU9G0Y9OGUO9RQZDQYMXX06MLCTAI
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	04h01m12s.40
RA (top/left)	03h56m59s.99
RA (top/right)	03h56m44s.40
RA (bottom/right)	04h05m19s.44
RA (bottom/left)	04h05m46s.63

Dec (center)	+36°27′44″.0
Dec (top/left)	+37°21′58″.8
Dec (top/right)	+35°37′14″.4
Dec (bottom/right)	+35°32′53″.8
Dec (bottom/left)	+37°17′38″.2

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Contribution Index (beta):

California Nebula

California Nebula

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Image Index:

Contribution Index (beta):

California Nebula

California Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these collections

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