Gassendi Crater (Niall MacNeill)

Contains: Solar system body or event

Gassendi Crater

Acquisition type: Lucky imaging

Gassendi Crater

Acquisition type: Lucky imaging

On a night of very good seeing I decided to see what sort of resolution was possible when imaging a crater whose size was similar to Jupiter. With the moon 95% full, the crater Gassendi is on the moons limb and could be seen in relief. It is a beautiful, complex and interesting crater on the northern edge of Mare Humorum, the smooth surface of which is seen towards the top of the image. The crater is 110kms in diameter and therefore has an apparent diameter of 60 arc seconds, about 50% larger than Jupiter. It was named for the French astronomer Pierre Gassendi.

This crater was partially filled with lava after the impact as can be seen from the flat floor, with the rim and central peaks sitting proud of the lava flow. A number of rilles criss cross the floor of the crater due to the shrinkage of the lava field.

Gassendi A is the crater that impacted the rim of Gassendi and has an interesting and complex interior and Gassendi B is below it in the image. The beautiful bowl like crater in Mare Humorum at upper right is Gassendi L.

This is an RGB capture so a colour image. I captured 5000 frames at 50 fps over 100 secs for each colour channel.

The resolution of detail is comparable with a planetary image. The resolution of my OTA is ~ 0.5% of the diameter of the crater.

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	Distinct awarded users	Total awarded images
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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
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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
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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.

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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.
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