NGC 3184, LRGB, 10 Apr 2020 (David Dearden)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: NGC 3179 · NGC 3181 · NGC 3184

Powered byPixInsight

NGC 3184, LRGB, 10 Apr 2020

Powered byPixInsight

NGC 3184, LRGB, 10 Apr 2020

39.8 ± 12 MLy

The sky was too clear, and I’m too stir crazy with working from home, to pass up a chance to image even though there is still a lot of Moon. My last attempt on this target was way back in 2016 so I thought I’d try it again. Finally having all my camera cabling and focuser tension issues worked out, it is really nice to have imaging sessions “just work.” I tried to start as soon as it got dark so as to maximize imaging time before the Moon rose. I could have taken a little more data but also wanted to move on to a second target. It was also really nice to have good flats. This image is quite a lot better than my last attempt.

Date: 10-11 Apr 2020

Subject: NGC 3184

Scope: AT8IN+High Point Scientific Coma Corrector

Filters: ZWO 31 mm diameter unmounted L, R, G, B

Mount: EQ-6 (EQMOD 2.000j)+PEC

Guiding: Orion Thin Off-axis Guider + ASI120MM-mini +PHD 2.6.7 (Win 10 ASCOM)

Camera: ASI1600MM-Cool, -20 °C, Gain 139 Offset 21

Acquisition: Sequence Generator Pro 3.1.0.457

Exposure: 15x180 R, 15x180 G, 45x180 L, 15x180 B

Stacking: Deep Sky Stacker 4.2.3 (64-bit) dark+flat+bias, κ-σ stacking with κ = 1.5 (see above!).

Processing: StarTools 1.6.392 beta: Software binned L 2x2, cropped, wiped, developed, HDR (reveal all), deconvoluted, untrack denoised (grain equalization). Combined R, G, & B in StarTools. Software binned 2x2, cropped, wiped, developed, HDR (optimize hard), color with a lot of saturation boost, untrack denoised (grain removal). Applied L to color in Photoshop. A little bit of levels adjustment, and one round of deep space noise reduction. AstroFrame.

Image the Universe
ZWO ASI1600MM/QHY163M

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

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	3404537
PixInsight job	6OPF4SBPOX0Z05D4FRL1GYWMCE3ML49X
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	10h18m18s.22
RA (top/left)	10h21m18s.43
RA (top/right)	10h15m48s.13
RA (bottom/right)	10h15m19s.66
RA (bottom/left)	10h20m46s.17

Dec (center)	+41°25′13″.2
Dec (top/left)	+41°44′35″.8
Dec (top/right)	+41°52′10″.4
Dec (bottom/right)	+41°05′32″.1
Dec (bottom/left)	+40°58′00″.1

Image Index:

Contribution Index (beta):

NGC 3184, LRGB, 10 Apr 2020

NGC 3184, LRGB, 10 Apr 2020

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

		...
You have no new notifications.

Image Index:

Contribution Index (beta):

NGC 3184, LRGB, 10 Apr 2020

NGC 3184, LRGB, 10 Apr 2020

Equipment

Acquisition details

Description

Comments

Sky plot

Histogram

In these public groups

Notifications

AstroBin is in READ ONLY mode

Sorry :-(

Sorry :-(

Sorry :-(

Are you really sure?

Warning!

Warning!

Are you sure?

Report abuse

Slideshow settings

IOTD/TP stats (last [x] days)

Distribution of astrophotographers

Distribution of subject types

Distribution of data sources

Sorry

Sorry

Share

Upload new revision

Upload uncompressed source (XISF/FITS/PSD/TIFF)

Delete image and all its revisions?

Delete original image?

Delete all other versions?

Delete all revisions?

IOTD/TP stats

The following people like this image

The following people bookmarked this image

Warning

Flag malfunctioning thumbnails

Contains

Remove yourself as a collaborator

Plate-solving information