Messier 102 (M102) (Ira Bell)

Celestial hemisphere: Northern · Constellation: Draco (Dra) · Contains: HD134023 · M 102 · NGC 5862 · NGC 5866 · Spindle galaxy

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Messier 102 (M102)

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Messier 102 (M102)

This is the result of my first multi-night study. While I collected over 23 hours of data, I spent a lot of time narrowing the best data down using PixInsight's subframe selector. Thus, the result shown is slightly over 16 hours of integration on LRGB.

Though I have a flats panel awaiting installation, I have been practicing with twilight flats. The SBIG Aluma AC4040 is a very sensitive camera which has been somewhat of a steep learning curve for me, but I do feel that I'm beginning to see improvements in the data.

The total count of each integration component by filter/category is shown below:

Lights
L: 235 x (40 seconds)
R: 242 x (70 seconds)
G: 232 x (70 seconds)
B: 235 x (70 seconds)

Flats
L: 21
R: 30
G: 31
B: 32
Dark Flats: 109

Darks
104 x (40 seconds)
104 x (70 seconds)

In PixInsight, I used the following steps:
Channel Combination -> RGB
RGB -> Dynamic Background Extraction -> Division
RGB -> Dynamic Background Extraction -> Subtraction
L -> Dynamic Background Extraction -> Division
L -> Dynamic Background Extraction -> Subtraction
Color Calibration -> RGB
Histogram Transformation -> RGB, L
LRGB Combination
Extract CIE * L Component, Invert, Generate Mask
TGVDenoise
RangeSelection, Generate Mask
UnsharpMask
StarMask, Generate Mask
Curves Transformation

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	5898119
PixInsight job	96BMBE2GSR3CGHH2UAJG1HEUTGMNYFEF
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	15h05m57s.766
RA (top/left)	15h08m08s.300
RA (top/right)	15h06m11s.698
RA (bottom/right)	15h03m47s.506
RA (bottom/left)	15h05m44s.680

Dec (center)	+55°47′25″.56
Dec (top/left)	+55°46′53″.94
Dec (top/right)	+56°05′37″.61
Dec (bottom/right)	+55°47′48″.40
Dec (bottom/left)	+55°29′12″.90

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Contribution Index (beta):

Messier 102 (M102)

Messier 102 (M102)

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Image Index:

Contribution Index (beta):

Messier 102 (M102)

Messier 102 (M102)

Equipment

Acquisition details

Description

Comments

Acquired at

Sky plot

Histogram

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