Observed arrival · 2026-10-19
Your birthday, counted in planetary years
Many Happy Orbits calculates ages and upcoming birthdays across planets, asteroids, a comet, and selected exoplanets.
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✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Families curious about birthdays beyond Earth
- Worth noticing
- Asteroid and comet paths use NASA JPL Horizons data from 1901–2099; some dates fall back to average orbits when daily data is unavailable.
Field notes
The page describes its inputs as names and birthdays, with calculations performed in the browser; it says those details remain on the visitor’s device. Its source trail distinguishes planetary fact sheets, JPL Horizons orbit data, and the NASA Exoplanet Archive. The FAQ also records practical limits: birth time is ignored, and some asteroid dates fall back to average orbits when daily data is unavailable.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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