Slowest rotating asteroid
- Who
- 288 Glauke
- What
- 50 day(s)
- Where
- Not Applicable
- When
- 1890
288 Glauke was discovered telescopically in 1890. It measures around only 32.2 km across but takes around 50 days to spin once on its axis. Of all the bodies in the Solar System only the planets Mercury and Venus are known to spin more slowly.