| Discovery [1] | |
|---|---|
| Discovered by | Pan-STARRS |
| Discovery site | Haleakala Observatory |
| Discovery date | 28 March 2023 |
| Designations | |
| 2023 FW13 | |
| Orbital characteristics [2] | |
| Epoch 26 February 2023 (JD 2460000.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 10.86yr (3,967 d) |
| Aphelion | 1.1781AU |
| 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 thePan-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'sHill sphere, making it aquasi-satellite.[3]
The orbit of2023 FW13 has a one-to-one resonance with Earth and is very eccentric, reaching out halfway toMars and halfway toVenus.[4] 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 overtake469219 Kamoʻoalewa as the most stable quasi-satellite of Earth.[4]
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