anomaly (redirected from anomalistic)

anomaly

Abnormality or deviation. Pronounced "uh-nom-uh-lee," it is a favorite word among computer people when complex systems produce output that is inexplicable. See software conflict and anomaly detection.

---

anomaly

1. Astronomy

a. the angle between a planet, the sun, and the previous perihelion of the planet

b. the angle between the periapsis of a particular point on a circle round the orbit as seen from the centre of the orbit. This point is obtained by producing a perpendicular to the major axis of the ellipse through the orbiting body until it reaches the circumference of the circle

c. the angle between the periapsis of an orbit and the position of an imaginary body orbiting at a constant angular speed and in the same period as the real orbiting body

2. Geology

a. a deviation from the normal value of gravity at the earth's surface, caused by density differences at depth, for example those caused by a buried mineral body

b. a magnetic field, for example one produced by a buried mineral body, that deviates from an expected or standard value, usually that of the earth's magnetic field