MessierMateAstronomy Observation Log for iOS
Chart the sky. Log every object. Complete the catalogue.
A dedicated observing log for amateur astronomers working through the Messier catalogue of 110 deep-sky objects, one night at a time.
M·01
Track your progress
Log sessions and check off Messier objects as you observe them. See your catalogue completion at a glance.
M·02
Plan your nights
See which objects are visible tonight from your location, sorted by altitude and urgency.
M·03
Log every detail
Record Bortle class, equipment, notes, and photos. Build a personal archive of every session.