Lunar Observation Log

Record observing sessions without creating an account. Entries stay in this browser's local storage. You can export a backup, import it later or remove entries whenever you choose.

Why repeat observations?

A lunar feature can look dramatically different as the Sun angle changes. Logging the date, phase, instrument and conditions turns casual viewing into a record you can compare over months or years.

What stays private

The log uses browser local storage. The entries are not sent to Lunar Probe. Clearing browser storage can remove them, which is why the JSON export is useful as a portable backup.