Uranus - November 08, 2020 (Fábio)

Contains: Solar system body or event

Uranus - November 08, 2020

Acquisition type: Lucky imaging

HI all,

follows the image of the planet Uranus taken here at the observatory at the beginning of this month with variable turbulence and good transparency! A few weeks ago we passed the opposition of this distant planet, something that was little publicized since Uranus is not on the list of planetary celebrities like Jupiter, Saturn and Mars. This makes the planet in order of distance from the Sun more like a curiosity than a target to be monitored by amateur astronomers. Uranos have some peculiarities that, through photography, are noticeable! In the RGB image, that is, in visible light, we see that Uranus has a bluish-green hue, characteristic of the presence of methane gas in its atmosphere that absorbs the longest wavelengths of sunlight, allowing the lengths to reflect mostly shorter waveforms like green and blue. We note that the planet also does not have a uniform brightness, being slightly brighter on one side than on the other. The reason for this difference appears in the infrared image, at wavelengths above 685 nm. There is a large clear region that stands out in the polar region. This is the north polar cap of Uranus, composed mainly of a veil of ammonia clouds that, unlike methane, reflects the sunlight more intensely. So we see the cap much more easily in the infrared than in the visible. In 1986, when Voyager 2 passed through Uranus, it saw its south pole completely facing the sun. In 2007 we had the equinox, where the equatorial region of the planet was facing the sun. about to see the north pole completely lit up in 2028.

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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
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.

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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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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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