NGC281, the Pacman Nebula (Paolo)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1590 · NGC 281 · The star Schedar (αCas) · The star ηCas

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NGC281, the Pacman Nebula

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NGC281, the Pacman Nebula

Hello all,

The target for this session is NGC281. This is the result of 3 nights (13 Dec, 16 Dec and 8 Jan 2021) of imaging.

It took me more than usual to process it because 1) I was looking for a new mount, and this drained my free time and 2) I was waiting for Rogelio's PixInsight book. Yep, this is my first image processed using PixInsight (and GIMP)!

Some data:

* session 1: 13th of Dec 2020. SQM 18.95 (22:15), external temp +0.9*C. 240/256 lights kept due to environmental issues

* session 2: 16th of Dec 2020. SQM 18.75 (21:10), external temp +3.0*C. Here I kept 23 lights (clouds came and stayed)

* session 3: 8th of Jan 2021. SQM 19.05 (22:31), external temp -0.5*C. 157/267 lights kept due to a focus issue

Common settings:

* 75s, 350mm, ISO400

* 25 darks for the 13th the 16th, another 25 for the 8th

* 50 flats, dark flats, bias for all 3 sessions.

Processing software:

* stacked using APP

* processed using PI

* final touches using GIMP

The total integration time is 8h45m, which is not much (especially with a stock camera), I know, but clouds have been really bad so I didn't have many opportunities. Moreover, I wanted to image something else and, most importantly, test the guiding system and the APO I received on XMas.

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

Distribution of astrophotographers

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	Distinct awarded users	Total awarded images
Image of the day
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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
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Star trails
Northern lights
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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.
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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	4316844
PixInsight job	A9OGDMKJ8W3065JS9Q0WGY3JRMM8AJ37
PixInsight queue size	n/a
PixInsight stage	PLATE_SOLVING_IMAGE

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NGC281, the Pacman Nebula

NGC281, the Pacman Nebula

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Image Index:

Contribution Index (beta):

NGC281, the Pacman Nebula

NGC281, the Pacman Nebula

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

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