HFG1 (Heckathorn, Fesen and Gull) Abell 6 (Jerry Macon)

Celestial hemisphere: Northern · Constellation: Cassiopeia (Cas) · Contains: PK136+04.1 · PK136+05.1

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HFG1 (Heckathorn, Fesen and Gull) Abell 6

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HFG1 (Heckathorn, Fesen and Gull) Abell 6

Imaged nights of 10/5/2021, 10/6/2021, 10/8/2021, 10/10/2021, 10/11/2021

HFG1 was discovered in the Milky Way Emission Line Study in 1982 by Heckathorn, Fesen and Gull (A&A, 114, 414, 1982). It is defined as a type F planetary nebula by Tweedy and Kitter (Astrophys. J Supp Series 107, 255-262, 1996) meaning that is appears to be uniformly filled. Its mag. 14.5 central star is a close, precataclysmic binary, V664 Cas. One report suggests that V664 left a trail at least 20′ long of ~10,000 year old shocked material as it ejected matter and moved through the interstellar medium (ISM).

The detail was brought out with 3 nm OIII and 5nm Ha filters and RGB data were added for star colors, but this object is extremely faint and requires long exposure to bring out any detail.

This object is so faint you can barely see any of it on a single frame. No wonder it took so long for HFG to discover it.

My Collections:
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Planetary Nebulae

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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
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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
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Star trails
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	5136030
PixInsight job	A1GG9ABSKDPCB4DUU0WIZG2SF44W6R7E
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	03h01m41s.70
RA (top/left)	02h56m20s.14
RA (top/right)	02h56m46s.30
RA (bottom/right)	03h06m47s.50
RA (bottom/left)	03h06m50s.75

Dec (center)	+64°45′26″.6
Dec (top/left)	+65°24′08″.0
Dec (top/right)	+64°05′04″.1
Dec (bottom/right)	+64°06′03″.5
Dec (bottom/left)	+65°25′10″.1

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HFG1 (Heckathorn, Fesen and Gull) Abell 6

HFG1 (Heckathorn, Fesen and Gull) Abell 6

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HFG1 (Heckathorn, Fesen and Gull) Abell 6

HFG1 (Heckathorn, Fesen and Gull) Abell 6

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