CG4 | A Great Example of Pareidolia (Kevin Morefield)

Celestial hemisphere: Southern · Constellation: Puppis (Pup) · Contains: HD60431 · HD60671 · HD60795

Image of the day 12/05/2023

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CG4 | A Great Example of Pareidolia

Image of the day 12/05/2023

Powered byPixInsight

CG4 | A Great Example of Pareidolia

Par·ei·do·lia ˌper-ˌī-ˈdō-lē-ə -ˈdōl-yə : the tendency to perceive a specific, often meaningful image in a random or ambiguous visual pattern.

It's hard not to see a worm or whale preparing to swallow a galaxy. But, of course, the nebula lies 1300 ly from us while the galaxy is over 100 million ly distant.

But what is this really? It is called a Cometary Globule (CG) because it resembles a comet. The mouth of the nebula faces the Vela supernova remnant and it appears the nebula is being blown away from it. There also appears to be a glow of hydrogen emission rimming the nebula. This is subtly more pink in color from the background hydrogen glow that is more red.

I shot quite a bit of Ha which was continuum subtracted and added to both the RGB master and the Luminance master. Deciding how much Red to subtract from the Ha was difficult. There is really hydrogen emission everywhere. I settled on a subtraction amount that left the galaxy about the same brightness as the background in the Ha master. That seemed right because I believe the galaxy is far enough away that its redshift would have pushed its Ha mostly outside the bandwidth of my filter. And, since I subtract the background value when adding the Ha to the RGB and Luminance, the galaxy would be neither enhanced nor degraded by the addition of the Ha. My formula for adding the continuum subtracted Ha is: R+(CleanHa-med(CleanHa)). I settled on subtracting 14% of the Red from the Ha, which is a fairly conservative amount.

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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
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	8816627
PixInsight job	CRXKRF7M1EBMLK3YEI5HFQM34XOIQCA9
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	07h33m45s.380
RA (top/left)	07h35m55s.746
RA (top/right)	07h32m16s.782
RA (bottom/right)	07h31m34s.344
RA (bottom/left)	07h35m14s.833

Dec (center)	-46°59′36″.41
Dec (top/left)	-46°52′33″.55
Dec (top/right)	-46°41′49″.92
Dec (bottom/right)	-47°06′30″.90
Dec (bottom/left)	-47°17′18″.27

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Image of the day 12/05/2023

CG4 | A Great Example of Pareidolia

Image of the day 12/05/2023

CG4 | A Great Example of Pareidolia

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Image of the day 12/05/2023

CG4 | A Great Example of Pareidolia

Image of the day 12/05/2023

CG4 | A Great Example of Pareidolia

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