| Minorplanet: | yes |
| Background: |
|
| 621 Werdandi | |
| Mpc Name: | (621) Werdandi |
| Alt Names: | 1906 WJ |
| Discovered: | 11 November 1906 |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Eccentricity: | 0.13840 |
| Semimajor: | 3.1269AU |
| Perihelion: | 2.6941AU |
| Aphelion: | 3.5597abbr=onNaNabbr=on |
| Period: | 5.53 yr (2019.6 d) |
| Inclination: | 2.3146° |
| Asc Node: | 67.107° |
| Arg Peri: | 31.965° |
| Mean Motion: | / day |
| Orbit Ref: | [1] |
| Observation Arc: | 104.13 yr (38035 d) |
| Uncertainty: | 0 |
| Abs Magnitude: | 10.49 |
| Rotation: | 11.776abbr=onNaNabbr=on |
| Mean Radius: | km |
621 Werdandi is a Themistian asteroid.