2024 PT5 is a near-Earth object roughly 11 meters (36 ft) in diameter discovered by ATLAS South Africa, Sutherland on August 7, 2024, the day before approaching Earth at 568,500 km (353,200 mi). The object orbits the Sun but makes slow close approaches to the Earth–Moon system. Between 29 September 2024 and 25 November 2024 (a period of 1 month and 27 days) it will pass 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 will become temporarily captured by Earth's gravity, with a geocentric orbital eccentricity of less than 1[4] and negative geocentric orbital energy.[5] The closest approach to Earth in 2025 will be 9 January 2025 at roughly 1,800,000 km (1,100,000 mi) when it will have a relative velocity of 1.03 km/s (2,300 mph).[2] It was last so near Earth around 11 February 2003 when it passed about 8,584,500 km (5,334,200 mi) from Earth.[2]
| Discovery[1] | |
|---|---|
| Discovered by | ATLAS South Africa, Sutherland |
| Discovery date | 7 August 2024 |
| Designations | |
| 2024 PT5 | |
| A119q0V | |
| Orbital characteristics[2] | |
| Epoch 2024-Oct-17 (JD 2460600.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 37 days |
| Aphelion | 1.03404606 AU (Q) |
| Perihelion | 0.990564100 AU (q) |
| 1.01230508 AU (a) | |
| Eccentricity | 0.02147671 (e) (Geocentric hyperbolic e=1.1) |
| 1.01853352 years | |
| 323.6773° (M) | |
| Inclination | 1.52051° (i) |
| 305.5723° (Ω) | |
| 2024-Nov-23.5354 | |
| 116.2485° (ω) | |
| Earth MOID | 0.00607823 AU (909,290 km; 2.36546 LD) |
| Jupiter MOID | 3.95662 AU (591,902,000 km) |
| Physical characteristics | |
| Dimensions |
|
| 27.6[3] | |
| Epoch | Earth distance[6] | Geocentric eccentricity[4] |
Apogee[4] | Orbital period[4] |
|---|---|---|---|---|
| 2024-Sep-29 | 0.0230 AU (3.44 million km) | 1.016 | ||
| 2024-Sep-30 | 0.0232 AU (3.47 million km) | 0.997 | 2.9 AU (430 million km) | 99.84 years (36,468 d) |
| 2024-Oct-24 | 0.0268 AU (4.01 million km) | 0.614 | 0.028 AU (4.2 million km) | 1.35 years (493 d) |
| 2024-Nov-25 | 0.0238 AU (3.56 million km) | 0.983 | 0.72 AU (108 million km) | 127.24 years (46,473 d) |
| 2024-Nov-26 | 0.0236 AU (3.53 million km) | 1.009 |
See also
edit- 1991 VG – near-Earth asteroid temporarily captured by Earth after its discovery in 1991
- 2006 RH120 – the first temporary Earth satellite discovered in situ 2006
- 2020 CD3 – another temporary Earth satellite discovered in 2020
- 2022 NX1 – another temporary Earth satellite discovered in 2022
- 2020 SO – a suspected near-Earth object identified as a rocket booster from the Surveyor 2 mission
References
edit- ^ "MPEC 2024-P170 : 2024 PT5". IAU Minor Planet Center. 14 August 2024. Retrieved 10 September 2024. (K24P05T)
- ^ a b c "JPL Small-Body Database Browser: (2024 PTR5)" (last observation: 2024-08-28; arc: 21 days (122 obs)). Jet Propulsion Laboratory. Retrieved 10 September 2024.
- ^ "2024 PT5 Orbit". Minor Planet Center. Retrieved 10 September 2024.
- ^ a b c d "JPL Horizons On-Line Ephemeris for 2024 PT5 orbit of Earth (geocentric) for September – November 2024". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Retrieved 10 September 2024. Geocentric solution. Ephemeris Type: Orbital Elements / Center: @399
- ^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (10 September 2024). "A Two-month Mini-moon: 2024 PT5 Captured by Earth from September to November". Research Notes of the AAS. 8 (9): 224. Bibcode:2024RNAAS...8..224D. doi:10.3847/2515-5172/ad781f.
- ^ "Horizons Batch for September – November 2024 Geocentric distance" (Escaping Earth's Hill Sphere @ ~0.01au). JPL Horizons. Retrieved 10 September 2024. (JPL#2/Soln.date: 2024-Aug-30)
