Last Updated：2025/11/28
(astronomy, celestial mechanics) The angle PCR formed by P = the periapsis of a celestial body's elliptical orbit, C = the center of that elliptical orbit, and R = the corresponding point to that celestial body (the projection of the celestial body along a direction parallel to the minor axis of its orbit onto the auxiliary circle (a circle which shares a diameter with the major axis of the celestial body's orbit)).
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eccentric anomaly
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Source Word
eccentric anomaly
Noun
countable
uncountable
(astronomy,
celestial
mechanics)
The
angle
PCR
formed
by
P
=
the
periapsis
of
a
celestial
body's
elliptical
orbit,
C
=
the
center
of
that
elliptical
orbit,
and
R
=
the
corresponding
point
to
that
celestial
body
(the
projection
of
the
celestial
body
along
a
direction
parallel
to
the
minor
axis
of
its
orbit
onto
the
auxiliary
circle
(a
circle
which
shares
a
diameter
with
the
major
axis
of
the
celestial
body's
orbit)).
Japanese Meaning
（天体力学）楕円軌道を持つ天体について、近日点（楕円軌道上の最も近い点）、軌道中心、および天体の位置に対応する補助円上の点により形成される角度、すなわち「離心近点角」を指す。
Sense（1）
(astronomy,
celestial
mechanics)
The
angle
PCR
formed
by
P
=
the
periapsis
of
a
celestial
body's
elliptical
orbit,
C
=
the
center
of
that
elliptical
orbit,
and
R
=
the
corresponding
point
to
that
celestial
body
(the
projection
of
the
celestial
body
along
a
direction
parallel
to
the
minor
axis
of
its
orbit
onto
the
auxiliary
circle
(a
circle
which
shares
a
diameter
with
the
major
axis
of
the
celestial
body's
orbit)).
（ plural ）
