Rupes Kelvin (Bruce Rohrlach)

Contains: Solar system body or event

Rupes Kelvin

Cropped view centred on the linear Rupes Kelvin, a 150-km-long NW-SE-oriented lunar fault scarp named after William Thomson - 1st Baron Kelvin (inventor of the Kelvin scale of absolute temperature measurement). Rupes is the Latin word for cliff.

The 45-km-long Promontorium Kelvin juts NNW-ward from Rupes Kelvin into the Sea of Humorum (Sea of Moisture). The reverse C shaped crater in the upper right is Hippalus, on the eastern margin of Mare Humorum. The southwest rim of Hippalus has been flooded and buried by mare basalts while the surviving rim is eroded. The flooded floor of Hippalus crater is bisected by a member of the Rimae Hippalus.

The 42-km-wide Vitello crater was named after 13th century Polish theologian, mathematician and physicist Vitello. It lies just to the east of the lava-flooded crater Lee. Vitello is 1,700 metres deep, its most eye-catching feature is a bright near circular rille that wraps around the central peaks on the crater floor. Vitello was mistakenly interpreted as a lunar caldera, subsequently disproved by latter high resolution imaging.

The large crater at bottom right is Campanus, a 2km deep crater that forms a pair with the Mercater crater.

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Distribution of astrophotographers

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	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
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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
Traveller
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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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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.

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