This should have been done like 5 years ago but oh well
All 44 Key Rush missions, the star markers are one each.
Only around 32 constellations out of 105 have them, and there are huge areas that don’t even have a single one. All of them either have no environments or are just hot + massive, except for “Sweet Quantity” which happens to be hot + electric, the only one of its kind. Also, their combined length is 1450 waves.
The datasheet can be found above. It lets you narrow down the search to a specific mission length, as well as mark completed missions so that they’ll disappear off the map.
