| Minorplanet: | yes |
| Background: |
|
| 420 Bertholda | |
| Discovered: | 7 September 1896 |
| Mpc Name: | (420) Bertholda |
| Alt Names: | 1896 CY |
| Mp Category: | Main belt (Cybele) |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 3.4163AU |
| Perihelion: | 3.311AU |
| Aphelion: | 3.5216abbr=onNaNabbr=on |
| Eccentricity: | 0.030818 |
| Period: | 6.31 yr (2306.4 d) |
| Inclination: | 6.6874° |
| Asc Node: | 242.661° |
| Arg Peri: | 236.020° |
| Dimensions: | 141.54 ± 2.08 km |
| Density: | 9.96 ± 0.75 g/cm3 |
| Rotation: | 11.04abbr=onNaNabbr=on |
| Abs Magnitude: | 8.3 |
| Mean Motion: | / day |
| Orbit Ref: | [1] |
| Observation Arc: | 115.96 yr (42353 d) |
| Uncertainty: | 0 |
| Moid: | 2.33214AU |
| Jupiter Moid: | 1.58341AU |
| Tisserand: | 3.132 |
420 Bertholda is a very large main-belt asteroid. It was discovered by Max Wolf on September 7, 1896, in Heidelberg, Germany. The object is part of the Cybele asteroid group, and is classified as a P-type asteroid.