(4881) Robmackintosh Main-belt Asteroid
Discovered on 1 December 1975 by C. Torres at Cerro El Roble.
Roberto Mackintosh (1971-2012) was the President of the Asociación Argentina Amigos de la Astronomia (2009-2012) and worked to better coordinate amateur and professional activities.Naming citation (20121228/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Robmackintosh is today
Seen from above the solar system on 2026-10-14: Robmackintosh is 2.33 au from the Sun and 3.23 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4881 |
| Provisional designation | 1975 XJ |
| Orbit class | Main-belt Asteroid |
| Diameter | 3.02 km (#15,159 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.336 |
| Absolute magnitude (H) | 14.37 |
| Orbital period | 3.52 years |
| Semi-major axis | 2.31 au |
| Perihelion – aphelion | 2.21 – 2.42 au |
| Eccentricity | 0.0461 |
| Inclination | 8.09° |
| Closest distance between its orbit and Earth's (MOID) | 1.22 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Roberto
- (7323) Robersomma
- (7794) Sanvito
- (8742) Bonazzoli
- (9478) Caldeyro
- (10579) Diluca
- (10590) Ragazzoni
- (12470) Pinotti
- (14919) Robertohaver
- (14964) Robertobacci
- (16996) Dahir
- (19224) Orosei
- (19457) Robcastillo
All asteroids named after someone called Roberto