- 1000 Piazzia
1000 Piazzia, discovered in 1923, is a main-belt asteroid orbiting the
Sun . It was the 1000thasteroid to be numbered, and was named in honour ofGiuseppe Piazzi , who discovered the first asteroid, 1 Ceres.Its radius is estimated to be 24 km, and measurements of its light curve by R. D. Stephens in 2001 showed it to be rotating with a period of 9.47 hours. [cite journal | title = Rotational Periods and Lightcurves of 1096 Reunerta and 1000 Piazzia | author=Stephens, R. D. | journal = Minor Planets Bulletin | volume = 28 | pages = 56 | url = http://adsabs.harvard.edu/abs/2001MPBu...28...56S]
The planet Piazzia comes closest to is Mars. It draws nearer than 1.33 AU 11 times in the 20th and 21st centuries. Rarely, the two are closer than one AU. This last happened in 1638, the last time for 14,000 years.
ee also
*
List of asteroids/901–1000 References
* [http://cfa-www.harvard.edu/iau/lists/NumberedMPs.txt Discovery Circumstances: Numbered Minor Planets]
* [http://asteroid.lowell.edu/ Asteroid Observing Services]
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