C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17 (Marzo Varea)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: Solar system body or event

C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17, Marzo Varea

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C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17

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C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17

C/2020 F3 (NEOWISE) from inside Zaragoza (population: 700,000) with a compact camera and no tracking. Thirty-seven 4-second takes, focal length 10.4 mm, aperture 1:1.8. I didn't even use flats at first; however I was pleasantly surprised by the gas tail, so I shared it.

Revision B has flats (obviously not perfect ones); background extraction in each subframe before registering and again after stacking; then color calibration, color saturation enhancement, and after that Asinh, CLAHE and histogram transformations; and finally noise reduction and unsharp masking in GIMP.

Revision C has green noise reduction added, last thing in Siril before passing the image to GIMP.

Original
B
Final
C
D

B

Description: Reprocess, slightly less terrible than the original version.

Uploaded: ...

C

Description: ...I forgot green noise reduction.

Uploaded: ...

D

Description: M81 and M82 are visible.

Uploaded: ...

Light Polluted skies
Very Wide Field
The OSC Club (One Shot Camera)
Compact Camera Astroimaging
Gimp Processing
Low-Cost Astrophotography

Solar System: comets

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	Distinct awarded users	Total awarded images
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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
Solar system
Extremely wide field
Star trails
Northern lights
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Landscape

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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
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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	Basic success
Started	...
Astrometry.net job	4988176
PixInsight job	n/a
PixInsight queue size	n/a
PixInsight stage	n/a

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C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17

C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17

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Image Index:

Contribution Index (beta):

C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17

C/2020 F3 (NEOWISE) in a Bortle 8 sky 2020-07-17

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Acquisition details

Description

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C

D

Sky plot

Histogram

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