Lunar Terminator & Feature Observability Simulator

Phase: Waxing Crescent / First Qtr (32.4% lit)

Terminator Longitude: -21.5° W

Subsolar Altitude at Central Meridian: +18.2°

Selected Optic: 10x50 Binoculars (Normal)

Phase / Date: Day 6.8

Optics:

Invert / Diagonal

Observing Conditions HIGH RELIEF

Formations within 5° to 20° of the terminator experience grazing low-angle sunlight, producing dramatic rim shadows and visible mountain peaks.

Montes Apenninus (Prime) Archimedes Crater Mare Nubium Rim

Selected Landmark Copernicus

Geological Type Impact Crater

Selenographic Coords 9.6° N, 20.0° W

Solar Elevation Angle -1.5° (In Shadow)

Observability Rating Emerging at Dawn in ~6h