When does 2018 GG2 pass Earth?
2018 GG2: closest approach April 2028
2018 GG2 passes Earth on April 3, 2028 at 22:09 UTC, 2,205,180 km from Earth's centre (5.7 lunar distances).
Distance through the flyby
lunar distances, ±12 h (JPL Horizons)Can you see it?
JPL Horizons gives a brightest apparent magnitude of 12.5 as seen from Earth's centre, at 06:50 UTC on Apr 4, 2028: a telescope object. At closest approach it is overhead at about 18°S, 105°E, where the Sun is below the horizon. Seen from the ground, its position and brightness differ from the geocentric values, the more so the closer it comes.
Impact risk
2018 GG2 was on JPL's Sentry impact-monitoring list until 2018-04-18, when further observations ruled out any impact in the period Sentry covers (about 100 years).
Physical data
| Absolute magnitude H | 19.26 |
| Orbit class | Apollo |
| Potentially hazardous asteroid (PHA) | yes |
JPL Small-Body Database: (2018 GG2).
Every close approach, 1900–2200
All passes within 0.2 au (78 lunar distances) computed by JPL. None comes closer than the 2028 pass. The uncertainty column is JPL's 3-sigma timing uncertainty; it grows for dates far from today.
| Date | Lunar dist. | Distance | km/s | Time ± |
|---|---|---|---|---|
| Mar 31, 1931 | 45.3 | 17.40 million km | 27.5 | < 00:01 |
| Apr 8, 1941 | 22.9 | 8.79 million km | 30.9 | 00:02 |
| Oct 18, 1977 | 67.9 | 26.10 million km | 27.3 | < 00:01 |
| Apr 3, 2028 | 5.7 | 2.21 million km | 29.5 | < 00:01 |
| Apr 7, 2038 | 18.0 | 6.91 million km | 30.7 | 00:02 |
| Apr 11, 2048 | 59.6 | 22.90 million km | 33.0 | 00:02 |
| Oct 13, 2094 | 65.7 | 25.25 million km | 30.1 | < 00:01 |
| Oct 18, 2104 | 71.2 | 27.37 million km | 27.3 | < 00:01 |
| Mar 31, 2185 | 35.1 | 13.49 million km | 28.1 | 00:02 |
| Apr 5, 2195 | 8.9 | 3.44 million km | 30.3 | 00:02 |
Questions
Will 2018 GG2 hit Earth?
2018 GG2 was on JPL's Sentry impact-monitoring list until 2018-04-18, when further observations ruled out any impact in the period Sentry covers (about 100 years).
How close will 2018 GG2 come?
2,205,180 km from Earth's centre, 2,198,809 km above the surface, on Apr 3, 2028 at 22:09 UTC (NASA JPL).
How big is 2018 GG2?
370–840 m (estimated from H = 19.26).
Can I see 2018 GG2?
At its brightest about magnitude 12.5 (JPL Horizons, geocentric): a telescope object.
Sources: NASA/JPL CNEOS close-approach data, Sentry, Small-Body Database and Horizons (geocentric ephemeris). Data fetched 30 Oct 2026, 00:24 UTC; refreshed weekly. Times converted from TDB to UTC.