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== Orbital parameters seem off ==
== moon ==


The semi major axis of an ellipse like the moon's orbit would be the average of its perigee (362,600 km) and apogee (405,500 km) values (both of which are unsourced, by the way). That computed number is 384,000 km but the semi major axis stated in the side table is 384,399 km. This could just be a rounding discrepancy, but if the semi major axis has 6 significant digits then the apogee and perigee should too. Astronomical measurements are known for a high degree of precision.
30 times diameter of earth yet next paragraph its one quarter the size of earth???? also isnt the sun a natural orbit of earth as wel as te moon..yet you say the moon is the only natural orbit.] (]) 07:58, 16 July 2024 (UTC)
:The Moon's '''orbit''' is about 30 times Earth's '''diameter'''. The Moon's '''diameter''' is about 1/4 of Earth's diameter. And no, the Sun does not rotate around Earth so it is not a natural satellite of the Earth. ] (]) 08:23, 16 July 2024 (UTC)
::got it, thanks ] (]) 21:59, 16 July 2024 (UTC)


The source of the semi major axis, eccentricity, orbital period, mean radius, etc. are a "mineralogy/geochemistry" review. Data like this should probably come from an astronomy source — ideally, an astrometric source. ] (]) 06:21, 3 October 2024 (UTC)
== Mass of the Moon needs to be fixed ==


Little edit at the end here for full disclosure. Is there an accepted source for this info? Is there a, for lack of a better word, "authority" when it comes to the moon's orbital parameters, etc.? I ask because I want to know myself and I haven't found anything suitable. <!-- Template:Unsigned --><small class="autosigned">—&nbsp;Preceding ] comment added by ] (] • ]) 06:27, 3 October 2024 (UTC)</small> <!--Autosigned by SineBot-->
5.972168e24 kg (mass of the Earth from the Misplaced Pages entry for Earth)


:JPL mean orbital elements are probably the closest thing to an authoritative source for solar system orbital parameters ] (]) 14:59, 4 October 2024 (UTC)
x 0.0123 (ratio of Moon to Earth, agrees with IAU recommendation of 0.0123000371)
::{{re|Whyistheskyblue1}} JPL isn't what we're using here, and probably for good reason. The Moon's orbit is complicated. Right now, we give four different sets of values, in a rather haphazard, inconsistent, and poorly sourced way:
::* The infobox to this article: q=362600 km, Q=405400 km, a=384399 km (no source for the first two, and a 2006 paper about mineralogy for the last one)
::*: {{u|Elert}} is right that those three numbers, which don't come from the same source, are not consistent with each other.
::* The ] section of this article: q=356400 km, Q=406700 km, mean distance=384400 km (with two sources, of which neither actually gives those numbers, making them uncited)
::* The infobox to ]: q=363228.9 km (range 356400–370400 km), Q=405400 km (range=404000–406700 km), a=384748 km, mean distance=385000 km (no source for the first two, and two somewhat obscure papers from the 1980s for the other two)
::* The ] section of ]: q=362600 km, Q=405400 km, a=384400 km (coming with a <sup></sup> tag)
::* ]: q=363296 km (range 356400-370300 km), Q=405504 km (range 404000-406700 km), a=384399 km, mean distance=385000.6 km. This is the only one of the four articles that is properly sourced, and that explains the apparent inconsistency. 383397 km, 384399 km, 384400 km, 385000 km and 385001 km are ''all correct'', because they refer to slightly different things.
::] doesn't cite JPL either for any of those values, but at least it says exactly what it means, and cites sources that are specifically about lunar ranging. ] (]) 11:56, 8 November 2024 (UTC)


== Etymology grammar ==
= 7.3457664e22 kg (mass of Moon)


The last "paragraph" of the Etymology and Names section is a dog's breakfast of a run-on that needs to be reworked. However, I am unable to make head nor tails of it, and would risk botching the intended meaning if I took the red pen to it which it sorely requires. Someone, please fix this mess. ] (]) 12:22, 16 November 2024 (UTC)
or 7.346e22 kg (keeping the same sig. fig. as is currently on the page)


:At a minimum, changing the commas in the excerpt below to em dashes&mdash;or simply removing the redundant clause between them&mdash; would greatly improve the legibility.
IAU Division I Working Group, Numerical Standards for Fundamental Astronomy, Astronomical Constants, Current Best Estimates (CBEs) https://iau-a3.gitlab.io/NSFA/NSFA_cbe.html ] (]) 11:52, 14 August 2024 (UTC)
::], one of whose symbols was the Moon and who was often regarded as the goddess of the Moon, was also called ]
:] (]) 13:01, 16 November 2024 (UTC)


:::I took a shot at straightening out that paragraph, based on the other Misplaced Pages articles. ] (]) 14:06, 16 November 2024 (UTC)
:As far as I can tell from both the cited sources and direct calculations like those above, the current stated figure of {{val|7.342}} × 10<sup>22</sup> is indeed just slightly wrong, and was first (I presume accidentally, as a typo) introduced in ]. <span style="border-radius:2px;padding:3px;background:#1E816F">]]</span> 18:34, 14 August 2024 (UTC)
::::Much better, thanks. ] (]) 14:08, 16 November 2024 (UTC)

== Not only one Natural satellite ==

there's also Kordylewski cloud ] (]) 14:23, 15 December 2024 (UTC)

Latest revision as of 17:39, 15 December 2024

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Orbital parameters seem off

The semi major axis of an ellipse like the moon's orbit would be the average of its perigee (362,600 km) and apogee (405,500 km) values (both of which are unsourced, by the way). That computed number is 384,000 km but the semi major axis stated in the side table is 384,399 km. This could just be a rounding discrepancy, but if the semi major axis has 6 significant digits then the apogee and perigee should too. Astronomical measurements are known for a high degree of precision.

The source of the semi major axis, eccentricity, orbital period, mean radius, etc. are a "mineralogy/geochemistry" review. Data like this should probably come from an astronomy source — ideally, an astrometric source. Elert (talk) 06:21, 3 October 2024 (UTC)

Little edit at the end here for full disclosure. Is there an accepted source for this info? Is there a, for lack of a better word, "authority" when it comes to the moon's orbital parameters, etc.? I ask because I want to know myself and I haven't found anything suitable. — Preceding unsigned comment added by Elert (talkcontribs) 06:27, 3 October 2024 (UTC)

JPL mean orbital elements are probably the closest thing to an authoritative source for solar system orbital parameters Whyistheskyblue1 (talk) 14:59, 4 October 2024 (UTC)
@Whyistheskyblue1: JPL isn't what we're using here, and probably for good reason. The Moon's orbit is complicated. Right now, we give four different sets of values, in a rather haphazard, inconsistent, and poorly sourced way:
  • The infobox to this article: q=362600 km, Q=405400 km, a=384399 km (no source for the first two, and a 2006 paper about mineralogy for the last one)
    Elert is right that those three numbers, which don't come from the same source, are not consistent with each other.
  • The #Position and appearance section of this article: q=356400 km, Q=406700 km, mean distance=384400 km (with two sources, of which neither actually gives those numbers, making them uncited)
  • The infobox to Orbit of the Moon: q=363228.9 km (range 356400–370400 km), Q=405400 km (range=404000–406700 km), a=384748 km, mean distance=385000 km (no source for the first two, and two somewhat obscure papers from the 1980s for the other two)
  • The #Elliptical shape section of Orbit of the Moon: q=362600 km, Q=405400 km, a=384400 km (coming with a tag)
  • Lunar_distance#Value: q=363296 km (range 356400-370300 km), Q=405504 km (range 404000-406700 km), a=384399 km, mean distance=385000.6 km. This is the only one of the four articles that is properly sourced, and that explains the apparent inconsistency. 383397 km, 384399 km, 384400 km, 385000 km and 385001 km are all correct, because they refer to slightly different things.
Lunar distance doesn't cite JPL either for any of those values, but at least it says exactly what it means, and cites sources that are specifically about lunar ranging. Renerpho (talk) 11:56, 8 November 2024 (UTC)

Etymology grammar

The last "paragraph" of the Etymology and Names section is a dog's breakfast of a run-on that needs to be reworked. However, I am unable to make head nor tails of it, and would risk botching the intended meaning if I took the red pen to it which it sorely requires. Someone, please fix this mess. 73.4.237.111 (talk) 12:22, 16 November 2024 (UTC)

At a minimum, changing the commas in the excerpt below to em dashes—or simply removing the redundant clause between them— would greatly improve the legibility.
Diana, one of whose symbols was the Moon and who was often regarded as the goddess of the Moon, was also called Cynthia
73.4.237.111 (talk) 13:01, 16 November 2024 (UTC)
I took a shot at straightening out that paragraph, based on the other Misplaced Pages articles. Special-T (talk) 14:06, 16 November 2024 (UTC)
Much better, thanks. 73.4.237.111 (talk) 14:08, 16 November 2024 (UTC)

Not only one Natural satellite

there's also Kordylewski cloud 83.23.83.39 (talk) 14:23, 15 December 2024 (UTC)

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