The Leo Triplet (wadeh237)

Celestial hemisphere: Northern · Constellation: Leo (Leo) · Contains: HD98388 · IC 2684 · IC 2694 · IC 2708 · IC 2745 · IC 2762 · IC 2782 · Leo Triplet · M 65 · M 66 · NGC 3623 · NGC 3627 · NGC 3628

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The Leo Triplet

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The Leo Triplet

This is the Leo Triplet, imaged from my home in Snohomish, WA.

The image was taken with my ASI1600MM-cool camera and Stellarvue SV80ST telescope. The exposures with 60 seconds each, unguided, with 59xR, 55xG and 60xB subs. The data was calibrated, registered and combined in CCDStack with processing in PixInsight.

There are parts of the tidal stream from NGC3628 in the raw data, but the noise was a bit too much to bring it out. More exposure time would have been needed to properly display it.

With just under 3 hours, there is not a lot of time for this target (especially from being as close to Seattle as I live) and the background was fairly noisy. I still have a lot to learn about noise reduction in PixInsight and I may have been a little heavy handed here. Also, the color balance on this one is tough. I used PhotometricColorCalibration, but still felt the need to tweak it a bit. I am used to having a bit more blue data in the outer spiral arms, especially in M65. But I've tried to be faithful to the data that I captured.

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	Distinct awarded users	Total awarded images
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	Image of the day	Top pick	Top pick nominations	Total submitted
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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	1984389
PixInsight job	E6WZI00IQLAEC22C5PXHMTDD4AM0YXQS
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	11h19m42s.87
RA (top/left)	11h23m03s.90
RA (top/right)	11h16m25s.57
RA (bottom/right)	11h16m23s.56
RA (bottom/left)	11h22m59s.90

Dec (center)	+13°17′02″.8
Dec (top/left)	+13°52′57″.3
Dec (top/right)	+13°53′52″.3
Dec (bottom/right)	+12°41′05″.5
Dec (bottom/left)	+12°40′08″.2

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