Overscan orbit

It does not draw past its prediction. The path is exactly the points it was handed and stops at the last one, with a HORIZON bar saying when and why: the next encounter nobody modelled, a conic patch limit. It is never extended, and never closed back into a tidy ellipse, because a path that looks as if it should close has not been computed to. The band is the uncertainty and widens with it; from the first point with none, the path turns dashed and says so rather than carrying the last width forward. A prediction has an age, and past max-age it is drawn stale. What leaves the plot is counted. Handed error-circle radii, it draws the forecast cone the NHC draws, only with its rate: the share of past errors inside each circle and what those errors were, printed beside it, or no cone at all; the whole path is inside less often than any one circle; later times are stippled; and the cone is never the craft's size. This is the weakest-sourced refusal in the kit: the film screens are aesthetics, and the rule stands on KSP's conic patches and the kit's own thesis.

demo/orbit.html, from this page

import 'overscan'
import 'overscan/overscan.css'

<ov-orbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
></ov-orbit>

import { OvOrbit } from 'overscan/react'

<OvOrbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
/>

import { OvOrbit } from 'overscan/vue'

<OvOrbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
/>

import OvOrbit from 'overscan/svelte/OvOrbit.svelte'

<OvOrbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
/>

banded to the horizon, two burns and a target

the uncertainty runs out at point 28: dashed from there, no band invented

computed 95 s ago, past max-age: dimmed and labelled

nearly a full orbit, and left open: the element never closes it

no prediction: the body, and nothing it would have to invent

a cone of error circles: its rate and basis printed, stippled after T+40m, and never the craft's size

the radii run out at point 30: the cone stops there and the path goes dashed

a cone with no containment rate: not drawn, because a shaded region with no rate reads as the edge of the possible

variation: source="orbit"

import 'overscan'
import 'overscan/overscan.css'

<ov-orbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
  source="orbit"
></ov-orbit>

import { OvOrbit } from 'overscan/react'

<OvOrbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
  source="orbit"
/>

import { OvOrbit } from 'overscan/vue'

<OvOrbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
  source="orbit"
/>

import OvOrbit from 'overscan/svelte/OvOrbit.svelte'

<OvOrbit
  label="MARS"
  body="3390"
  extent="12000"
  max-age="60"
  source="orbit"
/>