What is the expected time delay for every degree of elevation an obstacle occupies above the horizon?
Answer
Two to four minutes
When objects such as hills, buildings, or mountains rise above the horizon, they obstruct the observer's field of view. To account for this, one can estimate that for every single degree of angular elevation an object occupies, the moon will appear roughly two to four minutes later than its calculated rise time. This mental calculation helps observers adjust their expectations and arrival times, ensuring they are positioned correctly to see the moon once it has climbed high enough to clear the obstruction.
Related Questions
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