M40
Winnecke 4
Double star · UMa
Set observing location to calculate altitude, timing and practical visibility. This guide describes the object in general.
Explore this objectSTEP 1 · SET OBSERVING LOCATION
Where will you observe?
Your location tells us what is above the horizon and when. Choose a place before calculating the sky.
Location is used for sky calculations. Your profile stays in this browser; no account is required. City search and weather requests go directly to Open-Meteo. Normal links do not share your saved location. Observing guide