The Leo Triplet (Robert Fidler)

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

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The Leo Triplet

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The Leo Triplet

Gaining it's namesake from the constellation in which it is located, the Leo Triplet is a small clusters of galaxies. Two of these galaxies were first catalogued in Messier's famous list of "not comets" in the late 1700's. It wasn't until later that the dimmer NGC 3628 was discovered next to the brighter M65 and M66. These three galaxies can show how different spiral galaxies can look from our viewpoint. With the two Messier objects showing details of the delicate arms, while NGC 3628 lies nearly edge on to use, obscuring it's details behind the thick dust lanes of its arms.

These three islands of stars seem to me as the heralds of spring and galaxy season. I wish I had a bit more reach to get closer to them and reveal more detail, but they show up well enough at 600mm. While this is only an hour, I expect to add far more data as the year progresses.

SDAA AISIG Group

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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	Basic success
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Astrometry.net job	9205130
PixInsight job	n/a
PixInsight queue size	n/a
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The Leo Triplet

The Leo Triplet

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The Leo Triplet

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