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Explore the lunar surface like a planetary scientist with our interactive Lunar 100 Map. While most people only track the basic moon phases, this list allows you to locate specific geological features—from the massive Tycho crater (L6) to the subtle rilles of the Alpine Valley (L19).
What is the Lunar 100 Map?
Often described as "the Moon's version of the Messier List," the Lunar 100 was created by planetary scientist Charles Wood for Sky & Telescope magazine. The goal was to provide astronomy enthusiasts with a curated list of the 100 most interesting features visible on the Moon.
The list is arranged by observational difficulty. L1 is simply the Moon itself (visible to the naked eye), while L100 (Mare Marginis swirls) requires a powerful telescope and perfect lighting conditions to see.
How to Use This Field Guide
Don't try to find all 100 targets in one night! The best way to use this Lunar 100 Map is to align your observation with the current moon phase.
- Waxing Crescent: The best time to spot Earthshine (L2) on the unlit portion of the Moon.
- First Quarter: Look for high-contrast features like the Apennine Mountains (L4) emerging along the terminator line.
- Full Moon: Focus on bright ray systems like Tycho (L6) which are most visible under direct sunlight.
- Quarter Phases: The shadows are deepest here, making it the perfect time to hunt for mountain ranges and valleys.
Use the interactive map above to verify your targets. If you are looking for a challenge, try to capture an image of the elusive Mare Orientale (L80) when the lunar libration is favorable.
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