A 115‑Foot Space Rock Skims Past Earth: Can We See It?

Earlier this week astronomers at the Catalina Sky Survey announced the discovery of a new near‑Earth object, officially designated 2026 JH2. Roughly 115 feet (about 35 metres) in diameter, it’s the size of a modest house – big enough to make headlines, yet still tiny on cosmic scales.

Orbital calculations show that 2026 JH2 will make its closest approach to Earth later this afternoon, swinging by at a distance of roughly 0.003 AU – that’s just over a million kilometres, or about three times the distance between the Earth and the Moon. In astronomical terms that’s practically a friendly wave.

But a friendly wave doesn’t automatically translate into a pretty sight. The asteroid’s predicted apparent magnitude will hover around +13, meaning it’s far too faint for the naked eye. To actually catch a glimpse you’ll need a decent backyard telescope – something with at least a 6‑inch (150 mm) aperture and a stable mount. Point it toward the constellation of Aries (yes, that little ram) just after sunset, and you should be able to track the moving speck as it drifts across the star‑filled background.

Why does this matter? Aside from the sheer excitement of watching a rock from deep space glide by, close encounters like this give scientists a valuable rehearsal for planetary‑defence drills. Each fly‑by lets researchers refine their orbit‑determination techniques, test radar ranging, and practice the communication protocols that would be crucial if a truly hazardous object were on a collision course.

If you’re keen to try spotting 2026 JH2 yourself, here are a few practical tips: set up your telescope well before twilight, use a low‑power eyepiece to locate the broader field, then switch to a higher power to chase the moving dot. Keep a log of its position – even a simple sketch can be fun – and compare notes with online forums where other amateur astronomers share their sightings.

Whether you actually see the asteroid or just know it passed overhead, today’s fly‑by is a reminder that our planet lives in a dynamic neighbourhood. Space rocks come and go, and every close pass is an invitation to look up and marvel at the ever‑moving sky.