periherm

English

Etymology

From peri- +‎ Ἑρμῆς (Hermês, “Mercury”).

Noun

periherm (plural periherms)

(astronomy) In an orbit around the planet Mercury, the point that is closest to Mercury.

Antonyms

(antonym(s) of “a point in an orbit around the planet Mercury”): apoherm

See also

References

BepiColombo Mission

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