1000 Piazzia

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1000 Piazzia
AnimatedOrbitOf1000Piazzia.gif
Orbital comparison: 1000 Piazzia (blue) vs. the inner planets (red) and Jupiter (outermost)
Discovery [1]
Discovered by K. Reinmuth
Discovery site Heidelberg Obs.
Discovery date 12 August 1923
Designations
MPC designation 1000 Piazzia
Named after
 Giuseppe Piazzi
(astronomer)[2]
1923 NZ · 1951 OB
1967 ED
main-belt · (outer) [3]
Orbital characteristics [1]
Epoch 27 June 2015 (JD 2457200.5)
Uncertainty parameter 0
Observation arc 92.35 yr (33,730 days)         
Aphelion 3.9889 AU
Perihelion 2.3563 AU
3.1726 AU
Eccentricity 0.2572
5.65 yr (2,064 days)
16.45 km/s
103.55°
Inclination 20.570°
323.76°
280.84°
Physical characteristics
Dimensions 47.78±2.0 km (IRAS:17)[4]
51.55±0.86 km[5]
49.54±6.12 km[6]
47.15 km (derived)[3]
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
9.47±0.01 h[7]
9.2±0.2 h[8]
0.1119±0.010 (IRAS:17)[4]
0.097±0.004[5]
0.041±0.029[6]
0.0457 (derived)[3]
Surface temp. min mean max
Kelvin[9] 136 K 152 K 177 K
Celsius −137°C −121°C −96°C
Fahrenheit −214.6°F −185.8°F −140.8°F
S [3]
10.6[1]

1000 Piazzia, provisional designation 1923 NZ, is a dark asteroid from the outer region of the asteroid belt, about 48 kilometers in diameter. It was discovered by German astronomer Karl Reinmuth at Heidelberg Observatory in southern Germany, on 12 August 1923.[10]

The asteroid orbits the Sun at a distance of 2.4–4.0 AU once every 5 years and 8 months (2,064 days). Its orbit shows an eccentricity of 0.26 and is tilted by 21 degrees to the plane of the ecliptic.[1]

After the asteroid had been published by The Minor Planet Bulletin as an opportunity for photometry in 2001, an analysis of a classically double shaped minimum–maximum light-curve performed at Santana Observatory (646) in Rancho Cucamonga, California, showed it to have a rotation period of 9.47±0.01 hours with a brightness amplitude of 0.45.[7] According to the surveys carried out by Infrared Astronomical Satellite, IRAS, the Japanese Akari satellite, and the NEOWISE mission of the U.S.Wide-field Infrared Survey Explorer, the asteroid's surface has an albedo in the range of 0.04 to 0.11.[4][5][6] Although the Collaborative Asteroid Lightcurve Link (CALL) derives a low albedo in accordance to the space-based surveys, CALL classifies the body as a S-type rather than a carbonaceous C-type asteroid.[3]

The minor planet was named in honour of Italian Giuseppe Piazzi (1746–1826), Theatine monk and director of the observatories of Palermo and Naples, who elaborated a catalog of 7,646 stars. In 1801, Piazzi discovered 1 Ceres, the first and largest asteroid and the main-belt's only dwarf planet. He is also honoured by the lunar crater Piazzi.[2]

References

  1. ↑ 1.0 1.1 1.2 1.3 Lua error in package.lua at line 80: module 'strict' not found.
  2. ↑ 2.0 2.1 Lua error in package.lua at line 80: module 'strict' not found.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 Lua error in package.lua at line 80: module 'strict' not found.
  4. ↑ 4.0 4.1 4.2 Lua error in package.lua at line 80: module 'strict' not found.
  5. ↑ 5.0 5.1 5.2 Lua error in package.lua at line 80: module 'strict' not found.
  6. ↑ 6.0 6.1 6.2 Lua error in package.lua at line 80: module 'strict' not found.
  7. ↑ 7.0 7.1 Lua error in package.lua at line 80: module 'strict' not found.
  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links


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