2024 PT5 is a near-Earth object roughly 11 meters (36 ft) in diameter discovered by ATLAS South Africa, Sutherland on 7 August 2024, the day before approaching Earth at 568,500 km (353,200 mi).
Between 29 September (19:54 UTC) and 25 November 2024 (16:43 UTC) (a period of 1 month and 27 days)[4] it passed just outside Earth's Hill sphere (roughly 0.01 AU [1.5 million km; 0.93 million mi]) at a low relative velocity (in the range 0.002 km/s (4.5 mph) – 0.439 km/s [980 mph]) and became temporarily captured by Earth's gravity, with a geocentric orbital eccentricity of less than 1[5] and negative geocentric orbital energy.
[6] The most recent closest approach to Earth was 8 August 2024 at roughly 567,000 km (352,000 mi) when it had a relative velocity of 1.37 km/s (3,100 mph).
[9][10] Its color indices and the spectrum obtained with Gemini North best matches lunar rock samples followed by S-complex asteroids and has a rotation period of around 0.7h.
[10][13] Its reflectance spectrum in the range 350–2,350 nanometres (3,500–23,500 Å) obtained with LDT/IRTF is inconsistent with artificial objects and asteroids, its surface is quite red, well matched by samples of the Moon, both Maria and Highlands.