In general, a deviation from the norm.
Anomaly from → anomalous
Nâsâni, from nâ- negation suffix + sân "rule, law, custom" + -i noun maker suffix.
Fr.: anomalie eccentrique
Of a planetary orbit, the angle measured from the perihelion position, to the center of the circumscribing auxiliary circle, to the projected position of the planet on the circle. → anomaly; → mean anomaly; → true anomaly.
Fr.: anomalie moyenne
The angle between the periapsis of an orbit and the position of a hypothetical body that orbits in the same period as the real one but at a constant mean angular velocity.
South Atlantic Anomaly (SAA)
nâsâni-ye Atlas-e daštar
Fr.: Anomalie Atlantique Sud
A region of the Earth where the inner → Van Allen belt comes closest to the Earth's surface. It is due to the fact that the → geomagnetic field is offset from the center of the Earth. The region is centered near 25 degrees South 50 degrees West, close to the Atlantic coast of Brazil. The excess of trapped energetic particles in that region presents a problem for satellites in orbit around the Earth.
Fr.: anomalie vraie
One of the standard → orbital elements, which is the angle measured at the → focus nearest the → periapsis of an elliptical orbit, between the periapsis and the → radius vector from the focus to the orbiting body.