Last Updated：2025/11/28
(astronomy, celestial mechanics) An orbital parameter of a celestial body (in an elliptic orbit); the mean motion multiplied by the time since the last passage through periapsis; the angle PCM (measured in radians) defined by P = the periapsis, C = the center of the elliptical orbit, and M = the mean planet.
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mean anomaly
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Source Word
mean anomaly
Noun
countable
uncountable
(astronomy,
celestial
mechanics)
An
orbital
parameter
of
a
celestial
body
(in
an
elliptic
orbit);
the
mean
motion
multiplied
by
the
time
since
the
last
passage
through
periapsis;
the
angle
PCM
(measured
in
radians)
defined
by
P
=
the
periapsis,
C
=
the
center
of
the
elliptical
orbit,
and
M
=
the
mean
planet.
Japanese Meaning
平均近点角：天文学・天体力学において、楕円軌道上の天体の軌道パラメータの一つです。これは、平均運動と前回の近点通過からの経過時間の積により定義され、楕円の近点、軌道中心、天体位置を結ぶ角度を表します。
Sense（1）
(astronomy,
celestial
mechanics)
An
orbital
parameter
of
a
celestial
body
(in
an
elliptic
orbit);
the
mean
motion
multiplied
by
the
time
since
the
last
passage
through
periapsis;
the
angle
PCM
(measured
in
radians)
defined
by
P
=
the
periapsis,
C
=
the
center
of
the
elliptical
orbit,
and
M
=
the
mean
planet.
（ plural ）
