Reference image
Object guide
Bennu is a near-Earth carbonaceous asteroid studied by NASA's OSIRIS-REx mission; samples have been returned to Earth for laboratory analysis. 101955 Bennu is approximately 0.49 km across.
How to observe 101955 Bennu
101955 Bennu is generally a challenging visual target. Use a current ephemeris, dark skies, and image stacking when its angular size or brightness is insufficient for direct detail.
Scientific context
Useful scale comparisons are 0 Earth diameters, 0 g surface gravity, 1.194 Earth years per orbit. These values are rounded from the catalogue measurements shown on this page.
- Radius
- 0.245 km
- Diameter
- 0.49 km
- Mass
- 73,300,000,000 kg
- Mean density
- 1.19 g/cm³
- Surface gravity
- 0.000079 m/s² (0 g)
- Orbital period
- 436 days (1.194 years)
0 Earth diameters0 g surface gravity1.194 Earth years per orbit
Source: NASA/JPL Small-Body Database (checked 2026-08-09). Values are rounded catalogue measurements.
Interactive orbit model
Aug 13, 2026, 22:251×
Calculated positions / separate exploration scales