1000 Piazzia
 | |
| Discovery and designation | |
|---|---|
| Discovered by | Karl Wilhelm Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | August 12, 1923 |
| Designations | |
| MPC designation | 1923 NZ |
| Main belt | |
| Orbital characteristics | |
| Epoch August 27, 2011 (JD 2455800.5) | |
| Aphelion | 596.013 Gm (3.984 AU) |
| Perihelion | 352.737 Gm (2.358 AU) |
| 474.375 G m (3.171 AU) | |
| Eccentricity | 0.256 |
| 2062.497 d (5.65 a) | |
Average orbital speed | 16.45 km/s |
| 219.144° | |
| Inclination | 20.571° |
| 323.779° | |
| Physical characteristics | |
| Dimensions | 47.7 km |
| Mass | 1.1×1017 kg |
Mean density | 2.0 g/cm³ |
Equatorial surface gravity | 0.0133 m/s² |
Equatorial escape velocity | 0.0252 km/s |
Sidereal rotation period | ? d |
| ?° | |
Pole ecliptic latitude | ? |
Pole ecliptic longitude | ? |
| 0.10 | |
| Temperature | ~156 K |
| ? | |
| 9.6 | |
|
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1000 Piazzia is a main-belt asteroid, discovered in 1923. It was the 1000th minor planet to be numbered, and was named in honour of Giuseppe Piazzi, who discovered the first asteroid, 1 Ceres.
Its radius is estimated to be 24 km (15 mi), and measurements of its light curve by Robert D. Stephens in 2001 showed it to be rotating with a period of 9.47 hours.[1]
The planet Piazzia comes closest to is Mars. It draws nearer than 1.33 AU eleven times in the 20th and 21st centuries. Rarely, the two are closer than one AU. This last happened in 1638, and won't happen again for another 14,000 years.
See also
- The first 1000 minor planets
References
- ↑ Stephens, Robert D. (2001). "Rotational Periods and Lightcurves of 1096 Reunerta and 1000 Piazzia". Minor Planets Bulletin 28: 56. Bibcode:2001MPBu...28...56S.
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