THG Networks Presents
Messier MarathonObservers Log
Track your journey through Charles Messier's iconic catalog of 110 deep-sky objects. Log galaxies, nebulae, star clusters, and more as you race the night sky in a single evening.
Whether you're a seasoned observer or taking your first look through an eyepiece, MMOL keeps your observations organized, dated, and ready to revisit.
110
Messier Objects
1
Night to Log Them
∞
Clear Skies Ahead
Open the Observers Log
mmol.thgnetworks.com
Log Observations
Record each object you spot with date, time, conditions, and personal notes.
Full Catalog
All 110 Messier objects — galaxies, nebulae, clusters — in one place.
Marathon Ready
Built for the annual Messier Marathon — observe all 110 in a single night.