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So, what kind ice does Deimos have, with a surface temperature of "~313 K" (a very hot summer day where I live)? Gene Nygaard 19:45, 5 Jan 2005 (UTC)
The article had DAY-mus. This is an attempt at the classical Greek pronunciation; the English equivalent is DYE-mus or perhaps DEE-mus. Most refs, including Geyley's 1893 (1911, 1939) Classic Myths in English Literature and in Art and Zimmerman's 1964 Dictionary of Classical Mythology have the former; a few, such as Tripp's Meridian Handbook of Classical Mythology have the latter.
The Greek is the same as in dinosaur (just substitute N for M), if that helps you decide on a pronunciation. (Deinothere has the same vowel spelling in English as Deimos as well; it's also pronounced DYE-.) — kwami 07:44, 7 Apr 2005 (UTC)
It is related to dinosaur; it is not the same. But the first syllable should pronounced the same way. Septentrionalis PMAnderson 17:06, 3 June 2007 (UTC)
Am I really the only one who pronounces it "DAY-mohs"? It's the closest to the Greek pronunciation and most closely follows the spelling. 75.81.51.47 ( talk) 17:42, 24 October 2014 (UTC)
Anybody know of good info on the orbital evolution of Deimos? Since it's higher than synchronous orbit, it is moving outward, and I believe it will eventually escape; but I haven't found any good refs for the time scale required. -- Reuben 21:05, 4 April 2007 (UTC)
The current listed density (2.2 g/cm3) (unreferenced) differs significantly from these 2 NASA data pages:
Therefore, I decide to change it to the JPL value (that page is better referenced), and adding a reference to that page. Regards, -- Dna-Dennis ( talk) 21:33, 29 January 2008 (UTC)
The figures comparing the appearance of mars from Deimos to that of the full moon from earth are calculable from almanac data. The apparent radius of mars is given by arcsin ( Rmars / Rorbit ), giving 0.145 radians or 8.3 degrees . 90/8.3 = 10.8 gives the "one-eleventh" figure cited as the fraction of the width of the celestial hemisphere (i.e. 180 degrees ) taken up by the martian apparent diameter.
The apparent radius of the moon from the earth varies, and brackets the value of 0.00457 radians required to give the "1,000 times larger" comparison for mars' appearance from Deimos.
The intensity of lunar and martian sunlight also vary, and the minimum and maximum ratios bracket the value of 2.5 required to justify the "400 times brighter" comparison, assuming equal albedos. The albedo of the full moon approaches that of mars, but may be somewhat less, so a figure as high as "500 times" is perhaps justifiable, although the question is probably moot for a comparison of this type.-- L mammel ( talk) 01:30, 16 April 2008 (UTC)
Deimos is "the outer & smaller" of Mars' mini-moons. Thus, Mars' mini-moons decrease in mass outwards radially — completely consistent, along w/ their circular & equatorial orbits, w/ them having formed in situ from the same disk of dusty debris that made up Mars in the middle. -- 24.143.77.190 ( talk) 13:39, 7 March 2010 (UTC)
Roadrunner changed "the old" to "an", saying, Not an old convention - see Julian Day.
Yes, the Julian Day still counts from noon, but "August 11" is not a JD number. Does anyone still treat August 11 as beginning at local noon? If not, why not call that an "old" convention? — Tamfang ( talk) 19:50, 21 August 2010 (UTC)
The speed of orbit has nothing to do with the direction; "so fast that" makes no sense. — Preceding unsigned comment added by 208.76.28.102 ( talk) 09:36, 4 December 2018 (UTC)
In the article on Phobos it is explained that Phobos orbits faster than Mars rotates and so the directional shift is /apparent/ (relative to an observer on Mars), not actual. — Preceding unsigned comment added by 208.76.28.102 ( talk) 09:43, 4 December 2018 (UTC)
If I'm not wrong, there is an error in the value of the orbital inclination to Mars' equator. In fact, the cited source reports an orbital inclination of 1.7878° (positive) to the local Laplace plane, whose inclination is 0.8886° (positive) to Mars' equator. So, this two values should be summed and not subtracted. The correct value should be of 2.6738° to Mars' equator. -- Harlock81 ( talk) 00:08, 26 March 2012 (UTC)
FWIW - added a newly created {{ DeimosCraterNames}} imagemap template to the article - tried to label the crater locations as best as possible at the moment - (labels can be hyperlinked to relevant articles, like the label for Voltaire (crater)) - locations are "best-guesses" - a labeled Deimos image seemed helpful - any further help with this template project would be welcome of course - in any case - Enjoy! :) Drbogdan ( talk) 17:42, 19 August 2013 (UTC)
I think this article - and the Phobos one - under exploration should probably mention the Lockheed-Martin "Stepping Stones to Mars" "Red Rocks" study of possibilities and advantages of human exploration of Phobos and Deimos and their use as a base for telepresence exploration of Mars itself.
and http://www.csc.caltech.edu/talks/hopkins.pdf
What do you think? Robert Walker ( talk) 12:47, 14 September 2015 (UTC)
The article says that Deimos' rotation is synchronous but does not say or show which face is always pointed towards Mars. For example, are the craters Swift and Voltaire on the "face" of Deimos', off to the side, or on its back relative to Mars? -- Marc Kupper| talk 19:11, 16 February 2016 (UTC)
The " HORIZONS Web-Interface" reference (ref name=Horizons), reference #1, cited in full in the "semimajor" parameter in the infobox, is not a full citation at all. The link goes only to the home page of this web interface resource, which begins
That page says nothing about Deimos or any other body in the Solar System, and the search is not particularly easy. The article references it seven times, probably many of them at different locations. These should be made more precise. -- Thnidu ( talk) 05:56, 25 January 2017 (UTC)
This section was removed as unsourced. I moved it here, if anyone can source parts of it. Tom Ruen ( talk) 16:38, 8 September 2017 (UTC)
Are their any more moons 192.214.125.128 ( talk) 23:35, 5 December 2021 (UTC)
Is there any True color image of Deimos? Fredeee335 ( talk) 15:25, 23 June 2024 (UTC)