Object: NGC281 – Pacman - 2013 (HST Palette*) (Kirk)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: IC 1590 · NGC 281

Object: NGC281 – Pacman - 2013 (HST Palette*), Kirk

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Object: NGC281 – Pacman - 2013 (HST Palette*)

Powered byPixInsight

Object: NGC281 – Pacman - 2013 (HST Palette*)

Object: NGC281 – Pacman - 2013 (HST Palette*)

NGC 281 is a Hydrogen Alpha rich emission nebula in the constellation of Cassiopeia and is part of the Perseus Spiral Arm. Also in the shot are the open cluster IC 1590 and the multiple star HD 5005, plus several Bok globules. NGC281 is also known as the Pacman Nebula for its resemblance to the video game character.

- Other designations - IC 11 - Sharpless 184

- Distance: 9500 light years

- Radius: 48 light years

*HST palette which is accomplished by combining sub frames using three narrowband filters that capture light produced by glowing hydrogen (Ha), oxygen (OIII) and sulfur (SII) present in the nebula. Green is assigned to hydrogen, blue to oxygen and red to the sulfur.

Acquisition Date: Between 10/1/2013 and 10/3/2013

Camera: SBIG ST8300M @ -15°C

Telescope Stellarvue SV105T (f/7)

Mount: Losmandy G11 with Gemini II

Guidescope: 50mm finder/guider

Guide Camera: Orion SSAG

Filters:

-Hydrogen Alpha (Ha): 18 x 15min (270min)

-Oxygen III (OIII): 10 x 15min (150min)

-Sulfur II (SII): 12 x 15min (180min)

Total Exposure: 600min (10 hours)

Limiting Magnitude: 5.1

Comments: Stellarvue SFF7-21 field flattener.

Processed in PixInsight 1.8 and Adobe Photoshop CS5

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Distribution of astrophotographers

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	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
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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	Basic success
Started	...
Astrometry.net job	3516632
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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Object: NGC281 – Pacman - 2013 (HST Palette*)

Object: NGC281 – Pacman - 2013 (HST Palette*)

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Object: NGC281 – Pacman - 2013 (HST Palette*)

Object: NGC281 – Pacman - 2013 (HST Palette*)

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