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According to The Royal Shakespeare Company, this is pronounced [UM-bree-el].
I check pages listed in Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of Umbriel (moon)'s orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.
Reference named "usgs":
{{
cite web}}
: Check date values in: |date=
(
help)Reference named "orbit":
Reference named "Smith1986":
{{
cite journal}}
: Unknown parameter |coauthors=
ignored (|author=
suggested) (
help){{
cite journal}}
: Unknown parameter |coauthors=
ignored (|author=
suggested) (
help)I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT ⚡ 18:41, 26 September 2009 (UTC)
Out of curiousity, I did a quick, back-of-the-envelope comparison between Uranus as seen from Umbriel and the Moon as seen from the Earth at night. If my calculations are correct (which may be a big if ;-), the half phase Uranus reflects more than five times as much solar energy as seen from Umbriel than the first quarter Moon reflects as seen from Earth. That's despite the fact that Uranus is much further from the Sun than is the Earth/Moon system; Uranus compensates with a much bigger angular area as seen from Umbriel and a higher albedo than the Moon. So the night sky on Umbriel may not be all that dark, at least when Uranus is in the sky. Probably too much like OR for this article though. :-) — RJH ( talk) 20:20, 1 February 2010 (UTC)
After doing a wiki search for either "Leading" or "Trailing" hemispheres, I am unable to find an explanation by wikipedia for these phrases, or for that matter this article- adequately explaining the definition or difference of either of these terms. It would be good to clarify the terms or more pointedly add such terms to the wikilinked article Sphere#Hemisphere, or some appropriate area, along with a redirect for either of the terms and addition to the article Hemisphere. AnAnthro ( talk) 07:21, 3 April 2011 (UTC)
The caption on the blue-colored photo of Umbriel mentions polygons, and apparently has since the photo was added to the article. However, the article itself says that the only feature type identified on the moon is craters. When I look at the photo, I see some craters that are vaguely polygonal. If these are actually polygonal (i.e. their appearance isn't an artifact of the photograph or wishful thinking) it would be good to mention something in the article, even if it's just "Umbriel has some features which are polygons. Scientists are unsure what causes these shapes", along with an appropriate referrence, of course. Wabbott9 Tell me about it.... 22:16, 29 June 2011 (UTC)
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I have just modified one external link on Umbriel (moon). Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
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If you know the Radius, Surface Area, and Volume, and the Mass, then the density, and the surface gravity
are simple calculations. Density is Mass / Volume and it is more than that listed. it should be around 1.522. The gravity is between 0.24 and 0.25.
To find the surface gravity use Radius(km) X Density (kg/m^3)/ 3,582,688 = __________ m/sec^2. 584.7 X 1522 / 3,582,688 = 0.248 393, which is between 0.24, and 0.25. 98.245.216.62 ( talk) 21:24, 23 October 2020 (UTC)
This is the
talk page for discussing improvements to the
Umbriel (moon) article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
![]() | Umbriel (moon) is a featured article; it (or a previous version of it) has been identified as one of the best articles produced by the Wikipedia community. Even so, if you can update or improve it, please do so. | |||||||||
![]() | This article appeared on Wikipedia's Main Page as Today's featured article on April 3, 2011. | |||||||||
| ||||||||||
![]() | Facts from this article were featured on Wikipedia's Main Page in the " On this day..." column on October 24, 2011, October 24, 2012, October 24, 2014, October 24, 2017, October 24, 2020, and October 24, 2022. |
![]() | This ![]() It is of interest to the following WikiProjects: | ||||||||||||||||
|
![]() |
Daily pageviews of this article
A graph should have been displayed here but
graphs are temporarily disabled. Until they are enabled again, visit the interactive graph at
pageviews.wmcloud.org |
According to The Royal Shakespeare Company, this is pronounced [UM-bree-el].
I check pages listed in Category:Pages with incorrect ref formatting to try to fix reference errors. One of the things I do is look for content for orphaned references in wikilinked articles. I have found content for some of Umbriel (moon)'s orphans, the problem is that I found more than one version. I can't determine which (if any) is correct for this article, so I am asking for a sentient editor to look it over and copy the correct ref content into this article.
Reference named "usgs":
{{
cite web}}
: Check date values in: |date=
(
help)Reference named "orbit":
Reference named "Smith1986":
{{
cite journal}}
: Unknown parameter |coauthors=
ignored (|author=
suggested) (
help){{
cite journal}}
: Unknown parameter |coauthors=
ignored (|author=
suggested) (
help)I apologize if any of the above are effectively identical; I am just a simple computer program, so I can't determine whether minor differences are significant or not. AnomieBOT ⚡ 18:41, 26 September 2009 (UTC)
Out of curiousity, I did a quick, back-of-the-envelope comparison between Uranus as seen from Umbriel and the Moon as seen from the Earth at night. If my calculations are correct (which may be a big if ;-), the half phase Uranus reflects more than five times as much solar energy as seen from Umbriel than the first quarter Moon reflects as seen from Earth. That's despite the fact that Uranus is much further from the Sun than is the Earth/Moon system; Uranus compensates with a much bigger angular area as seen from Umbriel and a higher albedo than the Moon. So the night sky on Umbriel may not be all that dark, at least when Uranus is in the sky. Probably too much like OR for this article though. :-) — RJH ( talk) 20:20, 1 February 2010 (UTC)
After doing a wiki search for either "Leading" or "Trailing" hemispheres, I am unable to find an explanation by wikipedia for these phrases, or for that matter this article- adequately explaining the definition or difference of either of these terms. It would be good to clarify the terms or more pointedly add such terms to the wikilinked article Sphere#Hemisphere, or some appropriate area, along with a redirect for either of the terms and addition to the article Hemisphere. AnAnthro ( talk) 07:21, 3 April 2011 (UTC)
The caption on the blue-colored photo of Umbriel mentions polygons, and apparently has since the photo was added to the article. However, the article itself says that the only feature type identified on the moon is craters. When I look at the photo, I see some craters that are vaguely polygonal. If these are actually polygonal (i.e. their appearance isn't an artifact of the photograph or wishful thinking) it would be good to mention something in the article, even if it's just "Umbriel has some features which are polygons. Scientists are unsure what causes these shapes", along with an appropriate referrence, of course. Wabbott9 Tell me about it.... 22:16, 29 June 2011 (UTC)
Hello fellow Wikipedians,
I have just modified one external link on Umbriel (moon). Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
RfC before doing mass systematic removals. This message is updated dynamically through the template {{
source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 09:37, 10 February 2018 (UTC)
If you know the Radius, Surface Area, and Volume, and the Mass, then the density, and the surface gravity
are simple calculations. Density is Mass / Volume and it is more than that listed. it should be around 1.522. The gravity is between 0.24 and 0.25.
To find the surface gravity use Radius(km) X Density (kg/m^3)/ 3,582,688 = __________ m/sec^2. 584.7 X 1522 / 3,582,688 = 0.248 393, which is between 0.24, and 0.25. 98.245.216.62 ( talk) 21:24, 23 October 2020 (UTC)