(5028) Halaesus Jupiter Trojan
Discovered on 23 January 1988 by C. S. Shoemaker at Palomar.
Where Halaesus is today
Seen from above the solar system on 2026-10-14: Halaesus is 5.73 au from the Sun and 6.71 au from Earth. Computed from JPL's orbital elements.
Facts
| Number | 5028 |
| Provisional designation | 1988 BY1 |
| Orbit class | Jupiter Trojan |
| Diameter | 50.8 km (#731 largest of 17,440 named asteroids with a measured size) |
| Albedo | 0.0570 |
| Rotation period | 24.9 hours |
| Absolute magnitude (H) | 10.27 |
| Orbital period | 12.1 years |
| Semi-major axis | 5.26 au |
| Perihelion – aphelion | 4.58 – 5.95 au |
| Eccentricity | 0.130 |
| Inclination | 21.5° |
| Closest distance between its orbit and Earth's (MOID) | 3.59 au |
Data: NASA/JPL Small-Body Database and the IAU Minor Planet Center.