Discovery[1] | |
---|---|
Discovered by | K. Reinmuth |
Discovery site | Heidelberg Obs. |
Discovery date | 9 March 1956 |
Designations | |
(1990) Pilcher | |
Named after | Frederick Pilcher[1] (American photometrist) |
1956 EE · 1937 JL 1940 FA · 1959 CE1 1964 VS2 · 1972 EC 1972 GO · 1973 QM | |
main-belt[1][2] · (inner) background[3][4] · Flora[5][6] | |
Orbital characteristics[2] | |
Epoch 23 March 2018 (JD 2458200.5) | |
Uncertainty parameter 0 | |
Observation arc | 80.17 yr (29,283 d) |
Aphelion | 2.2851 AU |
Perihelion | 2.0625 AU |
2.1738 AU | |
Eccentricity | 0.0512 |
3.21 yr (1,171 d) | |
92.884° | |
0° 18m 27s / day | |
Inclination | 3.1320° |
193.63° | |
11.957° | |
Physical characteristics | |
6.39 km (calculated)[5] 6.754±0.167 km[7] 7.273±0.064 km[8] | |
2.842±0.001 h[9] | |
0.1864±0.0254[8] 0.215±0.039[7] 0.24 (assumed)[5] | |
Tholen = S[2] S (assumed)[5] B–V = 0.850[2] U–B = 0.504[2] | |
13.14[2][5][8] | |
1990 Pilcher, provisional designation 1956 EE, is a stony background asteroid from the Florian region of the inner asteroid belt, approximately 7 kilometers (4.3 miles) in diameter. It was discovered on 9 March 1956, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in Heidelberg, Germany. In 1982, it was named by the MPC for American physicist and photometrist Frederick Pilcher.[1] The S-type asteroid has a short rotation period of 2.8 hours.[5]
MPC-object
was invoked but never defined (see the help page).jpldata
was invoked but never defined (see the help page).AstDys-object
was invoked but never defined (see the help page).Ferret-Nesvorny-family
was invoked but never defined (see the help page).lcdb
was invoked but never defined (see the help page).Ferret
was invoked but never defined (see the help page).Masiero-2014
was invoked but never defined (see the help page).WISE
was invoked but never defined (see the help page).Brincat-2017a
was invoked but never defined (see the help page).