Global Information1768 Appenzella information
 Shape model of Appenzella from its lightcurve | |
| Discovery[1] | |
|---|---|
| Discovered by | P. Wild |
| Discovery site | Zimmerwald Obs. |
| Discovery date | 23 September 1965 |
| Designations | |
MPC designation | (1768) Appenzella |
Named after | Appenzell (canton)[2] |
Alternative designations | 1965 SA · 1934 PM 1942 TH |
Minor planet category | main-belt · Nysa[3] |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 74.56 yr (27,232 days) |
| Aphelion | 2.8899 AU |
| Perihelion | 2.0141 AU |
Semi-major axis | 2.4520 AU |
| Eccentricity | 0.1786 |
Orbital period (sidereal) | 3.84 yr (1,402 days) |
Mean anomaly | 175.69° |
Mean motion | 0° 15m 24.12s / day |
| Inclination | 3.2582° |
Longitude of ascending node | 12.423° |
Argument of perihelion | 19.718° |
| Physical characteristics | |
| Dimensions | 19.0±1.9 km[4] 19.30±0.17 km[5] 20.221±0.129 km[6][7] 20.86±2.3 km (IRAS:2)[8] 21±2 km[9] |
Synodic rotation period | 5.18335±0.00001 h[10] 5.1839±0.0001 h[11] |
Geometric albedo | 0.03±0.01[9] 0.032±0.007[6][7] 0.0338±0.009 (IRAS:2)[8] 0.039±0.008[5] 0.04±0.01[4] |
Spectral type | F (Tholen)[1] C (SMASS)[1] B–V = 0.615[1] U–B = 0.230[1] |
Absolute magnitude (H) | 12.70[1][3][4][5][6][9] |
1768 Appenzella (prov. designation: 1965 SA) is a rare-type Nysian asteroid from the inner regions of the asteroid belt, approximately 20 kilometers in diameter. It was discovered on 23 September 1965, by Swiss astronomer Paul Wild at Zimmerwald Observatory near Bern, Switzerland.[12] It was later named after the Swiss canton of Appenzell.[2]
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