Asteroid 951, discovered in 1916 by the Russian astronomer Grigorii Nikolaevich Neujmin (1886–1946). It was the first asteroid to be seen in detail, when the Galileo probe flew within 1600 km of it in 1991. Gaspra, an S-type asteroid, is irregularly shaped with dimensions of 18.2 × 10.5 × 8.9 km, and is probably a fragment of a much larger body. Its rotation period is 7.04 hours. As well as craters, Gaspra’s surface has linear grooves similar to those on Mars’s satellite Phobos. Gaspra’s orbit has a semimajor axis of 2.21 au, period 3.29 years, perihelion 1.83 au, aphelion 2.59 au, and inclination 4°.1.
http://photojournal.jpl.nasa.gov/catalog/PIA00118
The first asteroid observed in close-up by a spacecraft. The Galileo probe made a fly-by in October 1991 on its way to the planet Jupiter. It passed Gaspra at 8 km per second, coming within 1 600 km to take many images of the S-type asteroid, made up of a mixture of nickel, iron, and silicates.
Gaspra's irregular dimensions are approximately 19×12× 11 km. It is estimated to be between 300 million and 500 million years old. Its orbit averages 205 million km from the Sun. The asteroid was discovered in 1916 by the Russian astronomer Grigoriy Neujmin, who named it after a Black Sea holiday resort.
A solar system asteroid (No. 951), measuring 19 × 12 × 11 km; approximate mass 1016 kg; rotational period 7.042 hours; orbital period 3.29 years. It was imaged by Galileo in October 1991.
- feature modelling
- Fechner, Gustav Theodor (1801–87)
- fecundity
- fed batch bioreactor
- Federal Bureau of Investigation
- Federal Deposit Insurance Corporation
- federal fiscal system
- federalism
- Federalist Party
- Federal Reserve System
- Federal Trade Commission
- Federation of Rhodesia and Nyasaland
- Federov stereographic net
- FEDI
- FEED
- feed
- feed aggregator
- feedback
- feedback control
- feedback control loop
- feedback oscillator
- feedback queue
- feedback register
- feeder
- feedforward control