| Minorplanet: | yes |
| Background: |
|
| 409 Aspasia | |
| Discovered: | 9 December 1895 |
| Mpc Name: | (409) Aspasia |
| Alt Names: | 1895 CE |
| Adjective: | Aspasian |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.5752AU |
| Perihelion: | 2.3865AU |
| Aphelion: | 2.764abbr=onNaNabbr=on |
| Eccentricity: | 0.073284 |
| Period: | 4.13 yr (1509.5 d) |
| Inclination: | 11.262° |
| Asc Node: | 242.19° |
| Arg Peri: | 353.72° |
| Dimensions: | 176.33 ± 4.50 km |
| Density: | 4.10 ± 0.84 g/cm3 |
| Rotation: | 9.022abbr=onNaNabbr=on 9.021 h |
| Abs Magnitude: | 7.62 |
| Mean Motion: | / day |
| Observation Arc: | 120.33 yr (43952 d) |
| Uncertainty: | 0 |
409 Aspasia is a large main-belt asteroid that was discovered by French astronomer Auguste Charlois on 9 December 1895 in Nice. It is classified as a CX-type asteroid.
Photometric observations of this asteroid at the Palmer Divide Observatory in Colorado Springs, Colorado, during 2007–8 gave a light curve with a period of 9.021455 ± 0.000009 hours. This is consistent with previous results.