Yes, when I selected Home from Travellermap, I was looking for worlds that were very close to Earth in terms of UWP, except with a single gas giant, and with a single G2 V star. I have no idea if it has a moon or not in the OTU, but I needed no moon for other reasons so this universe Home has none.
There are actually only four worlds on TravellerMap that have 8 and 6 for size and atmosphere with a single G2 V star, "Epigoni", "Caledon", "Terra", and "Home". Hydrographics are a bit less than earth and Caledon has a bit more than Earth, but suspiciously earthlike was intentional, and if searching a list of 25507 inhabited systems only comes up with 4 examples of "suspiciously earth like" that does quite a bit better than typical scifi trope. If you're taking Home as a random sample of a world and typical of worlds in (my) traveller universe, there's a strong selection bias going on. There are a few other objects that I'm duplicating other work for that have analogues in the real solar system, one is an object entering the Home system that is an analogue of 1I/Oumuamua - I want to see how the crust will heat and cool as it swings around the sun, a couple of hundred years forward in game time (it's almost 700 au out at the moment), and an analogue to Vesta. I just tend to not post about them. Probably the asteroid could be called suspiciously Vesta-like, and that might well common in scifi too, but that was done in part to verify that the way I compute apparent magnitude is at least fairly close to the real thing, and that light curves look like real world vesta light curves. After it's done with that sort of thing, it gets moved into a different place in the Home system and often I won't bother modifying the shape or albedo or density or anything.
Other reasons for making it Earth-like as possible but still not Earth is verifying that things behave like they do for Earth, at least for models of similar complexity (and for climate that'll be simple box models at first - just a set of heat exchanges between boxes representing parts of the crust, ocean, atmosphere and what have you), before changing additional variables.
For now, Home has an exact 24 hour rotation period on a 31 degree axial tilt, and that's applied by two transformations rather than as a product of angular momentum (no long term tide locking can occur as a torque applied against that angular momentum, Home will have the same rotation period forever as things are right now), which it will eventually have. I do have to go step by step and it takes a long time to verify that each step is correct.
At any rate, Home is a toy system to build up the tools I want to have before I apply it in a more serious way. I'm not going to be writing a book about it or anything.
-------- Original Message --------
On Tue, Feb 20, 2018 at 03:10:43AM -0500, Caleuche wrote:
I started looking at how to determine what the seasons would be
like, or how far the polar caps might extend, on Home (as before,
axial tilt 31 degrees, semimajor axis around 1.05 AU or so, sun
luminosity star).
[...]
In the meanwhile, take an object sitting on a field - the 800 DTon
starship, for example, at the typical location of +55 degrees
north. It's 20 days past the start of fall
I don't recall what the rotational period of Home was, nor the
atmosphere or hydro ratings. Those are likely to have a strong effect
on minimum and maximum temperatures as well as the likelihood and
depth of snowfall and its melting.
So far Home seems an extremely Earthlike world, almost to the point of
being suspicious. But then, that is a pretty common trope for space
opera: every planet that isn't explicitly made to be a "hell world" is
just like Earth, except maybe for one notable feature that doesn't
matter at all such as the colour of vegetation.
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