1104 Syringa
1104 Syringa, provisional designation 1928 XA, is a dark background asteroid from the central regions of the asteroid belt, approximately 23 kilometers in diameter. It was discovered on 9 December 1928, by German astronomer Karl Reinmuth at the Heidelberg-Königstuhl State Observatory in southwest Germany. The asteroid was named after the flowering plant Syringa (lilac).
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg Obs. |
| Discovery date | 9 December 1928 |
| Designations | |
| (1104) Syringa | |
| Pronunciation | /sɪˈrɪŋɡə/ |
Named after | Syringa (flowering plant) |
| 1928 XA | |
| main-belt · (middle) background | |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 88.80 yr (32,435 days) |
| Aphelion | 3.5342 AU |
| Perihelion | 1.7257 AU |
| 2.6299 AU | |
| Eccentricity | 0.3438 |
| 4.27 yr (1,558 days) | |
| 351.89° | |
| 0° 13m 51.96s / day | |
| Inclination | 6.4413° |
| 128.66° | |
| 277.48° | |
| Physical characteristics | |
Mean diameter | 19.711±0.260 km 22.10±0.7 km 22.13 km (derived) 23.244±0.213 km 24.20±0.53 km 24.30±1.17 km |
| 5.1547±0.0012 h | |
| 0.031±0.003 0.033±0.006 0.036±0.008 0.0362±0.002 0.0434 (derived) 0.0450±0.0064 | |
| SMASS = Xk · X · P | |
| 12.30 12.35±0.29 12.50 | |
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