M65 M66 NGC 3628 - The Leo Triplet (Aaron Freimark)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: IC 2745 · Leo Triplet · M 65 · M 66 · NGC 3623 · NGC 3627 · NGC 3628

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M65 M66 NGC 3628 - The Leo Triplet

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M65 M66 NGC 3628 - The Leo Triplet

After weeks of clouds, I was able to finish this image of three galaxies. It is called the Leo Triplet due to its proximity to the zodiacal constellation. Close to the lion, perhaps, but 35 million light years from us. The interesting and different shapes make the Leo Triplet one of the most photographed objects in our night sky.

The odd looking one on the left is NGC 3628. But you may call it the Hamburger Galaxy. I didn't make that up.

251 one-minute photos, using a combination of red, green, blue, and luminance filters.

RGB

1. WeightedBatchProcessing (Calibrate only),

2. Crop one image as master

3. Image Registration all images to master

4. Subframe Selector for each filter

5. Local Normalization

6. Image Integration

7. Drizzle Integration

8. Dynamic Background Extraction on each filter

9. EZ Denoise

10. Statistics to see that G has highest median

11. LinearFit R & B to G

12. ChannelCombination RGB

13. Image Solver script

14. Photometric Color Calibration

15. EZ Soft Stretch

Luminance

1. EZ Decon

2. EZ Denoise

3. ArcsinhStretch

4. Export as TIFF, draw a mask by hand in Photoshop

5. Apply mask to reveal galaxies

6. HDR Multiscale Transform to bring out midrange detail

RGB

1. New mask to protect biggest star

2. LRGB Combination to apply L to RGB

3. Apply galaxy mask again

4. Brighten galaxies

5. CurvesTransformation on galaxies to increase saturation and reduce blue tint

6. Invert mask

7. CurvesTransformation to dim star luminance and increase saturation

8. Topaz DeNoise AI

Mid-Hudson Astronomical Association (MHAA)
Northeast Imagers
INDI Users

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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
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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	4493056
PixInsight job	0HB96IN2OZP501RKNJRA6I8M91STXJ84
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	11h19m52s.49
RA (top/left)	11h18m35s.35
RA (top/right)	11h17m52s.62
RA (bottom/right)	11h21m09s.41
RA (bottom/left)	11h21m52s.82

Dec (center)	+13°18′08″.4
Dec (top/left)	+13°56′13″.9
Dec (top/right)	+12°47′07″.2
Dec (bottom/right)	+12°39′54″.8
Dec (bottom/left)	+13°49′02″.1

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M65 M66 NGC 3628 - The Leo Triplet

M65 M66 NGC 3628 - The Leo Triplet

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M65 M66 NGC 3628 - The Leo Triplet

M65 M66 NGC 3628 - The Leo Triplet

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