Messier Object Planner

Messier Planner is a free, browser-based observing and planning tool designed for amateur astronomers and astrophotographers who want to explore deep-sky objects, with a particular focus on the Messier Catalogue. It runs entirely online, requires no downloads or account creation, and is intended to make planning observing sessions simple and accessible.

The tool allows users to browse Messier objects, select targets of interest, and plan observing or imaging sessions across upcoming nights. By organising objects into planned sessions, it helps observers decide what to view and when, making better use of clear skies and available observing time.

Messier Planner also includes a built-in digital logbook, enabling users to record details of their observations or imaging results directly within the tool. All data is stored locally in the user’s browser, keeping the service completely free and private, while still offering a practical way to track progress through the Messier list over time.

Overall, Messier Planner serves as a lightweight but powerful planning and logging companion for anyone working through Messier objects, from beginners starting their first observing projects to experienced astronomers managing structured observing campaigns.

https://www.messierplanner.co.uk/

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