Meanings
nounapohermion (plural not attested)
- no pluralastronomyApoapsis around Mercury.
MESSENGER is in an orbit of 80° inclination, with apohermion occurring in the southern hemisphere at 7.1 R_M (R_M is the radius of Mercury) and perihermion in the northern hemisphere at 1.1 R_M, and the orbital period is 12h.
2013 June, Guan Le, Peter J Chi, Xochitl Blanco-Cano, Scott Boardsen, James A Slavin, Brian J Anderson, Haje Korth, “Upstream ultra‐low frequency waves in Mercury's foreshock region: MESSENGER magnetic field observations”, in Journal of Geophysical Resarch, volume 118, number 6
Origin
Cite this entry
APA
apohermion. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/apohermion
MLA
“apohermion.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/apohermion. Accessed November 4, 2026.
Chicago
WatkinsX Dictionary, s.v. “apohermion,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/apohermion.
Source: apohermion on Wiktionary, CC BY-SA 4.0.