M108, the Surfboard Galaxy, LRGB-Ha (AnaTa)

Celestial hemisphere: Northern · Constellation: Ursa Major (UMa) · Contains: M 108 · NGC 3556

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M108, the Surfboard Galaxy, LRGB-Ha

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M108, the Surfboard Galaxy, LRGB-Ha

Image of the Surfboard Galaxy (M108) has SNR of 4.5.
Two panels are LRGB-Ha (Panel A) and LRGB-Ha annotation (Panel B)

Processing:
Dynamic Crop for R, G, B, Lum, Ha
GraXpert for Ha, Lum, R, G and B.
RGB combine.
Additional DBE for RGB
Color calibration for RGB.
Blur and Noise XT for RGB, Lum and Ha.
Star XT for RGB, Lum and Ha. This step is important, since Star XT after HT stretch will remove small Ha-regions in the galaxy.
Standard linear HT stretching for RGB, Lum, Ha and RGB-stars.

LRGB (no stars) was created.
Ha region was blended to LRGB using PixelMath.
Noise XT and then HT stretch was again applied.
Mask with Lum.
LHE, Kernel radius 40 and 150, power 0.3
MMT sharp (0.02-0.04 setting)
Curve for saturation, hue and brightness adjustment for galaxy.
Curve for star saturation of RGB stars.
Added RGB stars to the Galaxy (Panel A).
Annotation (Panel B)
Done.

Final
Original
C

Messier Objects

Messier Catalog

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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	9299546
PixInsight job	13R9RI3M114GGHA81T93MNOHGMQ21XCO
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h11m29s.799
RA (top/left)	11h12m21s.581
RA (top/right)	11h10m39s.200
RA (bottom/right)	11h10m38s.212
RA (bottom/left)	11h12m20s.264

Dec (center)	+55°40′20″.52
Dec (top/left)	+55°46′21″.27
Dec (top/right)	+55°46′31″.98
Dec (bottom/right)	+55°34′17″.62
Dec (bottom/left)	+55°34′06″.68

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Contribution Index (beta):

M108, the Surfboard Galaxy, LRGB-Ha

M108, the Surfboard Galaxy, LRGB-Ha

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Image Index:

Contribution Index (beta):

M108, the Surfboard Galaxy, LRGB-Ha

M108, the Surfboard Galaxy, LRGB-Ha

Equipment

Acquisition details

Description

Comments

Revisions

Sky plot

Histogram

In these public groups

In these collections

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