| Minorplanet: | yes |
| Background: |
|
| 428 Monachia | |
| Discovered: | 18 November 1897 |
| Mpc Name: | (428) Monachia |
| Alt Names: | 1897 DK; 1946 UL; 1949 OE; 1953 TN3; 1974 XU |
| Mp Category: | Main belt (Flora family) |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.30792AU |
| Perihelion: | 1.89497AU |
| Aphelion: | 2.72087abbr=onNaNabbr=on |
| Eccentricity: | 0.17893 |
| Period: | 3.51 yr (1280.6 d) |
| Inclination: | 6.19903° |
| Asc Node: | 17.6267° |
| Arg Peri: | 15.4466° |
| Dimensions: | 18 km[1] |
| Rotation: | 3.6342+/- |
| Abs Magnitude: | 12.0 |
| Albedo: | , 0.114 |
| Mean Motion: | / day |
| Orbit Ref: | [2] |
| Observation Arc: | 117.50 yr (42917 d) |
| Uncertainty: | 0 |
428 Monachia is an asteroid orbiting within the Flora family in the Main Belt.
It was discovered by Walther Villiger on 18 November 1897 in Munich, Germany. It was his only asteroid discovery. The asteroid's name comes from the Latin name for Munich.[3]