(5521) Morpurgo Main-belt Asteroid
Discovered on 15 August 1991 by E. F. Helin at Palomar.
Where Morpurgo is today
Seen from above the solar system on 2026-10-14: Morpurgo is 3.07 au from the Sun and 3.93 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5521 |
| Provisional designation | 1991 PM1 |
| Orbit class | Main-belt Asteroid |
| Diameter | 9.95 km (#5,127 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.235 |
| Rotation period | 6.19 hours |
| Absolute magnitude (H) | 12.69 |
| Orbital period | 4.14 years |
| Semi-major axis | 2.58 au |
| Perihelion – aphelion | 2.08 – 3.08 au |
| Eccentricity | 0.194 |
| Inclination | 11.2° |
| Closest distance between its orbit and Earth's (MOID) | 1.11 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 15 August 1991
More named asteroids discovered by E. F. Helin
- (1982) Cline
- (2048) Dwornik
- (2050) Francis
- (2062) Aten
- (2074) Shoemaker
- (2083) Smither
- (2099) Opik
- (2100) Ra-Shalom
- (2128) Wetherill
- (2143) Jimarnold
- (2220) Hicks
- (2335) James
← (5520) Natori · (5522) De Rop →