APOPHIS DAY Follow the flyby

A date the sky will remember.

DAYS
HOURS
MINUTES
SECONDS

Closest approach ·

Apophis will pass Earth safely.

Get the Mission Brief Explore the encounter

884 days, 7 hours, 46 minutes, 39 seconds until closest approach

A rare close approach.
No impact threat.

For a few extraordinary minutes, a 340-metre asteroid will pass closer than many satellites.

WHEN

Friday, 13 April 2029

CLOSEST APPROACH

Approximately 32,000 km above Earth's surface

SIZE

Approximately 340 m mean diameter

SAFETY

No Earth impact threat for at least 100 years

Distance is measured above Earth's surface. Last checked: 28 August 2026 See primary sources

Earth will change its path. We get to watch.

This close approach is a rare scientific opportunity. Earth's gravity will alter Apophis's orbit and may affect its rotation or surface in ways that careful observations can reveal.

Read the encounter summary

We will not watch alone.

Ground observatories and spacecraft missions are preparing to study Apophis before, during, and after the encounter.

  1. OSIRIS-APEX

    NASA

    confirmed Mission details

  2. RAMSES

    ESA

    planned Mission details

  3. DESTINY+

    JAXA / ISAS

    planned Mission details

Put the right idea into orbit.

For acquisition conversations, strategic partnerships, and thoughtful commercial proposals, start a direct conversation with the ApophisDay team.

Follow the approach, not the noise.

Receive concise, source-checked updates as missions launch, observations begin, and the 2029 encounter approaches.