| Minorplanet: | yes |
| Background: |
|
| 683 Lanzia | |
| Mpc Name: | (683) Lanzia |
| Alt Names: | 1909 HC |
| Discovered: | 23 July 1909 |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Eccentricity: | 0.056013 |
| Semimajor: | 3.1146AU |
| Perihelion: | 2.9402AU |
| Aphelion: | 3.2891abbr=onNaNabbr=on |
| Period: | 5.50 yr (2007.7 d) |
| Inclination: | 18.509° |
| Asc Node: | 259.724° |
| Arg Peri: | 283.703° |
| Mean Motion: | / day |
| Orbit Ref: | [1] |
| Observation Arc: | 101.75 yr (37,164 d) |
| Uncertainty: | 0 |
| Abs Magnitude: | 8.7 |
| Rotation: | 8.63abbr=onNaNabbr=on |
| Mean Radius: | km |
683 Lanzia is a minor planet orbiting the Sun. It was discovered July 23, 1909, by Max Wolf at the Landessternwarte Heidelberg-Königstuhl observatory and was named in honor of Lanz, founder of the Heidelberg Academy of Sciences. Photometric observations made in 2003 at the Santana Observatory in Rancho Cucamonga, California, give a synodic rotation period of 8.63 ± 0.005 hours. The light curve shows a brightness variation of 0.15 ± 0.04 in magnitude.
Observations during two last occultation 18 and 22 December 2010 (P.Baruffetti, G. Tonlorenzi - Massa, G. Bonatti - Carrara, R. Di Luca - Bologna (Italy), C. Schnabel - S. Estebe, J. Rovira - Moja (Spain)) measured a 122.5 km diameter (medium) and an Albedo of 0.0705 compatible with carbonaceous asteroids (C group).