periherm

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English[edit]

Etymology[edit]

From peri- +‎ Ἑρμῆς (Hermês, Mercury).

Noun[edit]

periherm (plural periherms)

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

Antonyms[edit]

  • (a point in an orbit around the planet Mercury): apoherm

References[edit]

  • BepiColombo Mission [[1]]

See also[edit]