Traveller 5 already defines size 1 maps as being 12 pentagons rather than the usual pentagon-hexagon mix. These days, with computer support, it might be better to just define the actual shape of the asteroid or planetoid (I stole the real-world didymos here): 

https://1drv.ms/v/s!AhOy6SzueEkKlYB3gG79V9s4PjTpMA?e=p5gcWU

On Monday, June 24th, 2024 at 3:31 AM, Richard Aiken - raikenclw at gmail.com <xxxxxx@simplelists.com> wrote:

> Hey All,
> I'm creating a series of blank world maps for my next campaign, which will focus on exploring beyond the fringe of Charted Space. Having read that bodies with diameters below ~700 km *may* not attain a spherical form (and those below ~400 probably never do), I'm considering using a folded-out octahedron [d8] for my Blank Size 0 World Map, rather than the normal folded-out icosahedron [d20]. I think this would make a good reminder that the worldlet in question isn't boringly round.
>
> Thoughts?
>
> --
> Richard Aiken
>
> "Never insult anyone by accident." Robert A. Heinlein
> "I studied the Koran a great deal. I came away from that study with the conviction there have been few religions in the world as deadly to men as Muhammed." Alexis de Tocqueville
> "We know a little about a lot of things; just enough to make us dangerous." Dean Winchester (fictional monster hunter portrayed by Jensen Ackles)
> "These men with me are here to vote. They care a lot less about dying than you do." Newton Knight (as portrayed by Matthew McConaughey), to a set of Redeemer poll watchers.
>
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