(2015 HJ)
Tracked by NASA JPL Near-Earth Object Web Service (NeoWs), (2015 HJ) is a Q-type (Olivine-Pyroxene) body measuring between 10.58m and 23.66m in diameter. On 2026-10-25, it completes a cislunar approach at 155.84 Lunar Distances (59,933,040.7 km) with a relative heliocentric velocity of 9.01 km/s.
(2015 HJ) (JPL ID 3715996) is a Q-type (Olivine-Pyroxene) Near-Earth Asteroid spanning 10.6m–23.7m (mean 17.1m). On 2026-10-25, it transits Earth's cislunar surveillance sector at 155.844 Lunar Distances (59,933,041 km) with a relative velocity of 9.01 km/s and a theoretical kinetic energy reserve of 0.07 megatons TNT. Its well-constrained heliocentric ephemeris passes safely outside Earth capture corridors while serving as an orbital calibration target.
Exact Landmark Scale Comparison (23.66m)
Kinetic Impact Physics & Orbital Parameters
(2015 HJ) (H = 27.0, Vmag ≈ 26.6) is below consumer optical detection thresholds (requires ≥1000mm survey aperture); explore certified meteorite specimens[↗] or indoor optical projection instead.
Campo del Cielo Meteorite Specimen (Certified Iron-Nickel)
Authentic coarse octahedrite Group IAB iron-nickel meteorite fragment (92.9% Fe, 6.7% Ni) recovered from the Chaco crater field with certificate of authenticity.
Satin-black 5W warm-white LED optical glass lens planetarium projecting 60,000 stars and simulated meteor shower trajectories indoors.
3D Ephemeris Trajectory Waypoints
Planetary Defense Frequently Asked Questions (Schema.org FAQ)
How big is (2015 HJ) compared to city landmarks?
(2015 HJ) has an estimated diameter between 10.58m and 23.66m. At its upper-bound size of 23.66m, it stands 5% as tall as the 443m Empire State Building in New York City and 7% of the 330m Eiffel Tower.
Will (2015 HJ) impact Earth during its 2026-10-25 approach?
No. NASA JPL Center for Near-Earth Object Studies (CNEOS) orbital solutions confirm (2015 HJ) will pass safely at a minimum distance of 155.84 Lunar Distances (59,933,040.7 km). You can still simulate a hypothetical street-level impact in our 3D CesiumJS simulator.
High-transmission BaK-4 Porro prism 15x70 optics with tripod adapter for bright near-Earth flybys, comets, and bolide shower radiants.
Autonomous apochromatic triplet smart telescope with integrated plate-solving, live stacking, and dual-band filter for magnitude 10–16 NEOs.
Ultra-portable Sony IMX678 starlight tele-camera with AI equatorial tracking and automated asteroid field stacking.
Authentic coarse octahedrite Group IAB iron-nickel meteorite fragment (92.9% Fe, 6.7% Ni) recovered from the Chaco crater field.
Low-read-noise Sony STARVIS 2 CMOS planetary and all-sky meteor bolide detection camera with 2.0μm pixels.