Last Updated
：2025/12/07
rectilinear orbit
Noun
A
theoretical
type
of
orbit
which
goes
in
a
straight-line,
up
and
down;
with
100%
orbital
eccentricity
(eccentricity=1.0);
the
orbital
path
passing
through
the
center-of-mass
of
the
primary
mass
being
orbited;
having
an
periapsis
at
0,
and
two
apoapsides,
as
both
arms
going
out
from
the
periastron
are
equidistant;
where
the
orbital
ellipse
has
zero
width
semi-minor
axis/minor
axis,
and
the
path
of
the
ellipse
is
the
same
as
the
major
axis.
Japanese Meaning
理論上の直線軌道であり、物体が中心質量を通過する直線上を上下に運動する軌道。軌道の離心率が1.0で、接近点（periapsis）が0となり、両側の遠点（apoapsis）が等距離に配置される。楕円の短半径がゼロとなり、楕円の経路が長軸と一致する点が特徴。
Sense（1）
A
theoretical
type
of
orbit
which
goes
in
a
straight-line,
up
and
down;
with
100%
orbital
eccentricity
(eccentricity=1.0);
the
orbital
path
passing
through
the
center-of-mass
of
the
primary
mass
being
orbited;
having
an
periapsis
at
0,
and
two
apoapsides,
as
both
arms
going
out
from
the
periastron
are
equidistant;
where
the
orbital
ellipse
has
zero
width
semi-minor
axis/minor
axis,
and
the
path
of
the
ellipse
is
the
same
as
the
major
axis.
（ plural ）
Quizzes for review
A theoretical type of orbit which goes in a straight-line, up and down; with 100% orbital eccentricity (eccentricity=1.0); the orbital path passing through the center-of-mass of the primary mass being orbited; having an periapsis at 0, and two apoapsides, as both arms going out from the periastron are equidistant; where the orbital ellipse has zero width semi-minor axis/minor axis, and the path of the ellipse is the same as the major axis.
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See correct answer
rectilinear orbit
The mission team simulated a rectilinear orbit to test how the instruments would respond to a straight up-and-down trajectory.
See correct answer
The mission team simulated a rectilinear orbit to test how the instruments would respond to a straight up-and-down trajectory.
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