Anima (Snow Phoenix)

the game doesn't have a good world title sorry

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Overview

Eons ago, a titanic sea dragon known as Ashtorra was put to rest by an old god, forming the Dragonspine Mountains that divide the lands of Al-Mahijo and Neverey. But these are just stories, right? Nobody would be crazy enough to try and awaken said dragon, right...?

Planetary Mechanics

Anima

Mass and Such

Anima and its "moon" Alaure are somewhat similar to the Earth-Moon system, but more extreme.

Anima is 7472.0 kilometers in radius (1.1728 Earth radii) and has a mass of 1.6228 Earths. Alaure has a radius of 4737.8 kilometers (0.7437 Earth radii) and has a mass of 0.3402 Earths. Alaure nominally orbits at an average distance of 97,423.6 kilometers. This sounds like Alaure would be huge in the sky, and it is noticeably so - its angular diameter in the sky of Anima is on average 343.6 arc-minutes, just over eleven times the average size of the Moon in Earth's sky (31.2 arc-minutes).

However, because of the small size difference between the two bodies, the barycenter of the orbit is not within Anima (specifically, it's 9412 kilometers beyond Anima's surface). Therefore, Anima itself is orbiting a central point. The eccentricity of the orbit is very low (0.000887), so apoplaneten and periplaneten are very close, and neither planet changes size much in the other's sky (Alaure's apparent size only changes by 37 arc-seconds between largest and smallest).

Anima and Alaure are mutually tidally locked. Both orbit the barycenter of the system once per 60 Earth hours. This also means a day on either planet is 60 Earth hours. However, people on Anima still divide their day into 24 hours, with the effect that each hour appears to be longer on Anima than in "reality". In the Snow Phoenix games, this difference between the Anima hour and the Earth hour is an in-universe explanation (albeit more of a hand-waving moment) for why the player is able to do much more than they reasonably should be able to within a given amount of time, though only the distance between the two bodies, the size of each, and the length of a day are called out in-text.

The mass of Anima's star is assumed to be the same as the Sun, so the length of a year on Anima (or Alaure) is 443.4 Earth days (thanks to a slightly further orbital distance of 1.138 AU). Nominally, this means the Gregorian-style calendar used in the Snow Phoenix games is one of the various anachronisms.

base by eggramen