(19457) Robcastillo Outer Main-belt Asteroid
Discovered on 21 April 1998 by ODAS at Caussols.
Roberto Castillo (b. 1961) works at the European Southern Observatory's Paranal site, where he takes care of several instruments. He also builds telescopes for amateurs, and it is said that half the amateur telescopes in Chile have been constructed by him.Naming citation (20031110/MPCPages.arc), IAU / Minor Planet Center, via NASA/JPL
Where Robcastillo is today
Seen from above the solar system on 2026-10-14: Robcastillo is 3.48 au from the Sun and 4.44 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 19457 |
| Provisional designation | 1998 HE6 |
| Orbit class | Outer Main-belt Asteroid |
| Diameter | 10.9 km (#4,638 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0450 |
| Rotation period | 4.35 hours |
| Absolute magnitude (H) | 13.69 |
| Orbital period | 5.77 years |
| Semi-major axis | 3.22 au |
| Perihelion – aphelion | 2.84 – 3.60 au |
| Eccentricity | 0.118 |
| Inclination | 7.85° |
| Closest distance between its orbit and Earth's (MOID) | 1.85 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also named after someone called Roberto
- (4881) Robmackintosh
- (7323) Robersomma
- (7794) Sanvito
- (8742) Bonazzoli
- (9478) Caldeyro
- (10579) Diluca
- (10590) Ragazzoni
- (12470) Pinotti
- (14919) Robertohaver
- (14964) Robertobacci
- (16996) Dahir
- (19224) Orosei
All asteroids named after someone called Roberto
Also discovered on 21 April 1998
- (9244) Visnjan
- (11715) Harperclark
- (11716) Amahartman
- (11718) Hayward
- (11719) Hicklen
- (11720) Horodyskyj
- (11721) Shawnlowe
- (11724) Ronaldhsu
- (11725) Victoriahsu
- (12091) Jesmalmquist
- (12092) Erinorourke
- (12093) Chrimatthews