2023 FW13
| Discovery | |
|---|---|
| Discovered by | Pan-STARRS |
| Discovery site | Haleakala Observatory |
| Discovery date | 28 March 2023 |
| Designations | |
| 2023 FW13 | |
| |
| Orbital characteristics | |
| Epoch 26 February 2023 (JD 2460000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 10.86 yr (3,967 d) |
| Aphelion | 1.1781 AU |
| Perihelion | 0.8225 AU |
| 1.0003 AU | |
| Eccentricity | 0.1777 |
| 1.0005 yr (365.42 days) | |
| 73.09° | |
| 0° 59m 6.601s / day | |
| Inclination | 2.7441° |
| 70.557° | |
| 354.40° | |
| Earth MOID | .0454762 AU (6,803,140 km; 17.6979 LD) |
| Physical characteristics | |
| |
2023 FW13 is an asteroid that was spotted on March 28, 2023, from the Pan-STARRS telescope at Hawaii, United States. It circles the sun in sync with Earth in such a way that it appears to orbit Earth, but well outside Earth's Hill sphere, making it a quasi-satellite.
The orbit of 2023 FW13 has a one-to-one resonance with Earth and is very eccentric, reaching out halfway to Mars and halfway to Venus. It's estimated that it has circled Earth since 100 B.C. and will continue until 3700 A.D. If those estimates are correct, it would significantly overtake 469219 Kamoʻoalewa as the most stable quasi-satellite of Earth.