I need some advice about the visibility of the moon on a given date, at a given position, for a piece of fiction I'm writing. I hope if someone could be kind enough to give me a hand.

Position: Lower Mall, London, UK (51.49003066468501, -0.23175453092158516)

Date and time: Early morning of 9th April 2023 (between 03:00 and 04:00)

My understanding from this site here is that the moon could have been visible around this time (Waning Gibbous, culmination at 03:12, 18 deg South) although there were a few clouds in the sky around that time. My concern however is mostly around the position of the moon, and if it would be possible to see it considering the obstructions (buildings and trees). Here is a Google Street View of the position in question.

Any thoughts?

  • $\begingroup$ That's a lot of precision "...for a piece of fiction I'm writing"! $\endgroup$
    – uhoh
    Commented Jan 21 at 5:14

1 Answer 1


The moon would be in the South, and 20 degrees (about a quarter of the angle between the horizon and the zenith) above the horizon.

Since from "Lower Mall" the southern view looks over the river, there are no obstructions. Provided the weather was clear, the moon would have been visible.


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