(4769) Castalia Apollo
Discovered on 9 August 1989 by E. F. Helin at Palomar.
Where Castalia is today
Seen from above the solar system on 2026-10-14: Castalia is 1.36 au from the Sun and 1.52 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 4769 |
| Provisional designation | 1989 PB |
| Orbit class | Apollo · near-Earth · potentially hazardous |
| Diameter | 1.40 km (#17,370 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0920 |
| Rotation period | 4.09 hours |
| Absolute magnitude (H) | 17.38 |
| Orbital period | 1.10 years |
| Semi-major axis | 1.06 au |
| Perihelion – aphelion | 0.549 – 1.58 au |
| Eccentricity | 0.483 |
| Inclination | 8.89° |
| Closest distance between its orbit and Earth's (MOID) | 0.0204 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.
Also discovered on 9 August 1989
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
← (4768) Hartley · (4770) Lane →