Personal archive · Memoir
4°20′ returns
4°20′
Lived
Book survey of 4°20′ returns (1693 · 2025 · …)
A survey, not a dozen proofs. 1693 local mean 04:20 sits on the same plate.
What it supports
Discovery-order in Stars. One object for the return-series.
What it does not
Individual years are not extra 42s.
ExactnessCoordinate
Form4°20′
Unitreturns
Strengthmemoir