594913 ꞌAylóꞌchaxnim
Long-exposure composite image of ꞌAylóꞌchaxnim (center) | |||||||||
| Discovery | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Discovered by | Zwicky Transient Facility | ||||||||
| Discovery site | Palomar Obs. | ||||||||
| Discovery date | 4 January 2020 | ||||||||
| Designations | |||||||||
| (594913) ꞌAylóꞌchaxnim | |||||||||
| Pronunciation | /aɪˈlɒʔtʃæxnɪm/ Luiseño: [ʔajˈlɔʔt͜ʃaxnɪm] | ||||||||
| 2020 AV2 · ZTF09k5 | |||||||||
| Vatira · Atira · NEO | |||||||||
| Orbital characteristics | |||||||||
| Epoch 1 July 2021 (JD 2459396.5) | |||||||||
| Uncertainty parameter 2 | |||||||||
| Observation arc | 1.67 yr (609 days) | ||||||||
| Aphelion | 0.6538 AU | ||||||||
| Perihelion | 0.4571 AU | ||||||||
| 0.5554 AU | |||||||||
| Eccentricity | 0.17701 | ||||||||
| 0.41 yr (151.2 d) | |||||||||
| 85.295° | |||||||||
| 2° 22m 51.424s / day | |||||||||
| Inclination | 15.868° | ||||||||
| 6.706° | |||||||||
| 187.330° | |||||||||
| Earth MOID | 0.34694 AU (51.9 million km) | ||||||||
| Mercury MOID | 0.06561 AU | ||||||||
| Venus MOID | 0.07896 AU | ||||||||
| Physical characteristics | |||||||||
| 1.7+0.6 −0.6 km | |||||||||
| 0.22 (assumed for S-type asteroids) | |||||||||
| |||||||||
| Sa | |||||||||
| 18.0 | |||||||||
| 16.17±0.78 | |||||||||
594913 ꞌAylóꞌchaxnim (provisional designation 2020 AV2) is a large near-Earth asteroid discovered by the Zwicky Transient Facility on 4 January 2020. It is the first asteroid discovered to have an orbit completely within Venus's orbit, and is thus the first and only known member of the eponymous ꞌAylóꞌchaxnim (informally named Vatira before its discovery) population of Atira-class asteroids. ꞌAylóꞌchaxnim has the smallest known aphelion and third-smallest known semi-major axis among all asteroids. With an absolute magnitude approximately 16.2, the asteroid is expected to be larger than 1 km in diameter.