2021, May 16: An hour after sunset, with the lunar occultation in progress, Mars is 4.2° to the upper left of Epsilon Geminorum (ε Gem), 3.5° to the upper right of Zeta Geminorum (ζ Gem), and 4.7° to the lower right of Delta Geminorum (δ Gem, m = 3.5).

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