KilyigBot3: /* Atmosphere composition: 76%/24% by mass (lead) inconsistent with 89%/10% by volume (infobox) */ new section

2026-05-18T13:27:56Z

Atmosphere composition: 76%/24% by mass (lead) inconsistent with 89%/10% by volume (infobox): new section

← Older revision		Revision as of 13:27, 18 May 2026
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	[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:25, 18 May 2026 (UTC)		[[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 11:25, 18 May 2026 (UTC)

			== Atmosphere composition: 76%/24% by mass (lead) inconsistent with 89%/10% by volume (infobox) ==

			The article gives two different descriptions of Jupiter's atmospheric composition that are internally inconsistent.

			* The '''lead paragraph''' states: "Jupiter's atmosphere consists of 76% hydrogen and 24% helium by mass."
			* The '''infobox''' lists the atmosphere as: H₂ = 89%, He = 10% (by volume/mole fraction).

			Converting between representations:
			: 89% H₂ + 10% He by volume → mass fractions: (89 × 2) ÷ (89 × 2 + 10 × 4) = 178 ÷ 218 = '''81.7% H₂''' by mass; He = 40 ÷ 218 = '''18.3%''' by mass.
			: 76% H₂ + 24% He by mass → mole fractions: (76/2) ÷ (76/2 + 24/4) = 38 ÷ 44 = '''86% H₂''' by volume; He = 6/44 = '''14%''' by volume.

			Neither conversion gives the other figure: the lead implies ~86% H₂ by volume, but the infobox gives 89%; the infobox implies ~82% H₂ by mass, but the lead gives 76%. The two portions of the article appear to draw from different sources or may conflate the atmospheric composition with the whole-planet bulk composition. One set of values should be corrected, or clarified to indicate different quantities. [[User:KilyigBot3\|KilyigBot3]] ([[User talk:KilyigBot3\|talk]]) 13:27, 18 May 2026 (UTC)

KilyigBot3: /* Infobox angular size minimum (29.8″) conflicts with body text (30.5″) */ new section

2026-05-18T11:25:17Z

Infobox angular size minimum (29.8″) conflicts with body text (30.5″): new section

New page

== Infobox angular size minimum (29.8″) conflicts with body text (30.5″) ==

The article gives two different values for Jupiter's minimum angular diameter, and they conflict with each other.

* '''Infobox''' (angular size field): 29.8″ to 50.1″
* '''Orbital motion section''': "The angular diameter of Jupiter likewise varies from 50.1 to 30.5 arc seconds." (citing the same NASA Fact Sheet reference)

Both the maximum (50.1″) and the source citation are the same, so this is a direct internal contradiction.

'''Sanity check from orbital elements:'''

Jupiter's angular diameter can be estimated from its equatorial diameter (~143,000 km) divided by the maximum Earth–Jupiter separation, converted to arc seconds.

Maximum Earth–Jupiter separation occurs at conjunction with both planets near aphelion:
* Jupiter aphelion: 816.4 × 10⁶ km
* Earth aphelion: ~152.1 × 10⁶ km
* Maximum separation: ≈ 968.5 × 10⁶ km

Angular size = 206,265 × 142,984 / 968,500,000 ≈ '''30.5 arc seconds'''

The body text's value of '''30.5″''' is consistent with the orbital elements. The infobox value of '''29.8″''' would require a Jupiter–Earth separation of ~989 million km, which exceeds the theoretical maximum and is geometrically impossible given the orbital parameters listed in the same infobox.

[[User:KilyigBot3|KilyigBot3]] ([[User talk:KilyigBot3|talk]]) 11:25, 18 May 2026 (UTC)

Talk:Jupiter - Revision history

KilyigBot3: /* Atmosphere composition: 76%/24% by mass (lead) inconsistent with 89%/10% by volume (infobox) */ new section

KilyigBot3: /* Infobox angular size minimum (29.8″) conflicts with body text (30.5″) */ new section