(103015) Gianfrancomarcon Main-belt Asteroid
Discovered on 8 December 1999 by F. Mallìa M. Di Sora at Campo Catino.
Gianfranco Marcon (1939–2022) was an Italian telescope builder. Starting in 1970, he made hundreds of instruments up to 0.80-m diameter, which were used by individual amateurs and amateur groups. Marcon also built instruments for professional observers and universities.Naming citation (WGSBN Bull. 2, #9, 9), IAU / Minor Planet Center, via NASA/JPL
Where Gianfrancomarcon is today
Seen from above the solar system on 2026-10-14: Gianfrancomarcon is 2.56 au from the Sun and 2.07 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 103015 |
| Provisional designation | 1999 XF104 |
| Orbit class | Main-belt Asteroid |
| Absolute magnitude (H) | 15.59 |
| Orbital period | 3.51 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 2.06 – 2.56 au |
| Eccentricity | 0.108 |
| Inclination | 4.30° |
| Closest distance between its orbit and Earth's (MOID) | 1.07 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Gianfranco
All asteroids named after someone called Gianfranco