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
- (a point in an orbit around the planet Mercury): apoherm
See also
- periapsis
- perihelion
- perigee
References
- BepiColombo Mission