Talk:174567 Varda

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Astronomy: Astronomical objects / Solar System Low‑importance

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Move?[edit]

According to WP-ru, the moon is Ilmarë, but I can't confirm. — kwami (talk) 03:17, 19 January 2014 (UTC)[reply]

MPC circular, page 86715 (really pg 431 of the pdf). Tbayboy (talk) 05:58, 19 January 2014 (UTC)[reply]

Thanks! They had it flagged for cn on WP-ru too. — kwami (talk) 06:20, 19 January 2014 (UTC)[reply]

Pronunciation?[edit]

In Quenya it would be IPA: [ˈvarda] (Varda), IPA: [ˈilmarɛ] (Ilmarë). Double sharp (talk) 11:30, 20 February 2014 (UTC)[reply]

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External links modified[edit]

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Surface gravity[edit]

Why does the infobox emphasize the equatorial surface gravity? In some infoboxes it stands as "surface gravity" while in others there stands "equatorial surface gravity", although the input is the same (surface_grav). How do you control what is mentioned? 212.186.7.232 (talk) 08:00, 23 March 2019 (UTC)[reply]

The "Equatorial" pops up if it's a minor planet.

I looked at a few other probably-dwarf planets, and they all excluded spin effects, too, so I left your 0.015 for consistency. The Template:Infobox planet actually gives the proper formula to use, and for Varda it works out to 0.012, or 80% of the non-spinning/polar surface gravity. There's a Template:Gr that takes the mass and radius and gives you m/s, but it also doesn't account for spin. Even funnier is that the Surface gravity page starts by saying it should include spin (that is, "surface gravity" is the same as "equatorial surface gravity"), but then ignores spin in its example calculation! Tbayboy (talk) 18:17, 26 March 2019 (UTC)[reply]

How does the infobox know that it's a minor planet? It's still the same infobox (the one for planets). You're free to add 0.012 g to the infobox, but we better not do it for it would look weird if there's written "equatorial s. g." and one mentions both gravities (on poles and equator). 212.186.7.232 (talk) 16:17, 27 March 2019 (UTC)[reply]

"minorplanet = yes" changes various properties of the infobox. I looked at 4 or 5 dwarfs and they all were not giving the equatorial number (can't really tell for Pluto, and it's big enough that there's not much difference), so I figure an incorrect consistency is okay here (assuming I didn't pick a bunch of oddballs). It really needs addressing at the project level. Tbayboy (talk) 17:19, 27 March 2019 (UTC)[reply]

Maybe because it's a centripetal throw rather than lower gravity. That force due to rotation means that at the equator not only you can jump higher, but also farther in the direction of rotation and not-so-far in the opposite direction. That's not really lower gravity, nor is it created by the planet itself, instead it's a centripetal throw. But the gravity itself can indeed be different if the radius is bigger at the equator. 212.186.7.232 (talk) 17:33, 27 March 2019 (UTC)[reply]

I think that it is better to integrate {{Gr}} and {{V2}} templates functionality directly into {{Infobox planet}} taking into account rotational effects. Ruslik_Zero 13:25, 28 March 2019 (UTC)[reply]

HST Image[edit]

I want to upload and use this particular Hubble image of Varda from this website but I'm not sure if it is copyrighted or not. I've tried searching through www2.lowell.edu and found nothing mentioning image usage and copyright. Nrco0e (talk) 03:15, 26 April 2019 (UTC)[reply]

No source for polar diameter[edit]

The infobox gives a size of 790±15 × 790±15 × 723±14 km, citing [1]. However, that paper neither mentions a polar diameter (723?), nor an uncertainty on it (14?). There is a note in this Wikipedia article that says the polar diameter was calculated from the given oblateness of 0.085, which would be via $790\cdot \left(1-0.085\right)=723$ . However, this would lead to an equivalent diameter of $\left(790\cdot 790\cdot 723\right)^{1/3}=767$ , which does not agree with the value given in the reference (756 km). This may be because the source does not specify the size of the second axis. One should be careful about drawing conclusions that are not explicitly validated by the reference: Assuming $a=b=790$ sounds straight forward but is not necessarily correct. In addition, the uncertainty to the polar diameter (and also to the medium axis) is completely unverified. If I should guess, it seems this comes from $15\cdot \left(1-0.085\right)=13.7\approx 14$ , but uncertainties can't be handled like that! My suggestion: Remove the 790±15 × 790±15 × 723±14, and replace it with what the source actually says: Equatorial diameter 790±15, oblateness 0.085. Renerpho (talk) 19:30, 2 March 2020 (UTC)[reply]

Symbol[edit]

I notice on pages for certain other TNOs (Makemake, Haumea, Gonggong, Sedna, etc), the Wikipedia articles have assigned them various symbols from Suberic.net (namely, this page), but the symbol in use here for Varda is nowhere to be seen. From where is Wikipedia getting this symbol? 134340Goat (talk)

It's from Zane Stein.[2] — kwami (talk) 08:02, 31 January 2023 (UTC)[reply]

It is mentioned and attributed to Zane Stein in the Unicode proposal for the more likely dwarfs' symbols, which is the source being used for these. Double sharp (talk) 22:39, 31 January 2023 (UTC)[reply]