| Minorplanet: | yes |
| Background: |
|
| 393 Lampetia | |
| Discovered: | 4 November 1894 |
| Mpc Name: | (393) Lampetia |
| Pronounced: | [1] [2] |
| Alt Names: | 1894 BG |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Semimajor: | 2.7774AU |
| Perihelion: | 1.8568AU |
| Time Periastron: | 2023-Aug-15 |
| Aphelion: | 3.698abbr=onNaNabbr=on |
| Eccentricity: | 0.33146 |
| Period: | 4.63 yr (1690.6 d) (4.63 yr) |
| Inclination: | 14.879° |
| Asc Node: | 212.460° |
| Arg Peri: | 90.824° |
| Rotation: | 38.7abbr=onNaNabbr=on |
| Abs Magnitude: | 8.39 |
| Mean Motion: | / day |
| Observation Arc: | 112.56 yr (41112 d) |
| Uncertainty: | 0 |
393 Lampetia is a fairly large main belt asteroid that was discovered by German astronomer Max Wolf on 4 November 1894 in Heidelberg. It has an unusually low rotation rate, with a period estimated at 38.7 hours and a brightness variation of 0.14 in magnitude.
In 2000, the asteroid was detected by radar from the Arecibo Observatory at a distance of 0.98 AU. The resulting data yielded an effective diameter of .
It comes to opposition at apparent magnitude 10.5 on 6 July 2023[3] and then perihelion on 15 August 2023.