469219 Kamoʻoalewa
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469219 Kamoʻoalewa (/kəˌmoʊʔoʊəˈlɛvə/),[6] provisionally designated 2016 HO3, is a very small asteroid, fast rotator and near-Earth object of the Apollo group, approximately 40–100 meters (130–330 feet) in diameter. At present it is a quasi-satellite of Earth, and currently the second-smallest, closest, and most stable known such quasi-satellite (after 2023 FW13). The asteroid was discovered by Pan-STARRS at Haleakala Observatory on 27 April 2016. It was named Kamoʻoalewa, a Hawaiian word that refers to an oscillating celestial object.[1][2] The Earth-like orbit and lunar-like silicates may be a result of it being lunar ejecta.[7][8]
Quick Facts Discovery, Discovered by ...
Discovery [1] | |
---|---|
Discovered by | Pan-STARRS |
Discovery site | Haleakala Observatory |
Discovery date | 27 April 2016 |
Designations | |
(469219) 2016 HO3 | |
Pronunciation | /kəˌmoʊʔoʊəˈlɛvə/ Hawaiian: [kəˈmoʔowəˈlɛvə] |
Named after | Kamoʻoalewa ("the oscillating fragment") |
2016 HO3 | |
Orbital characteristics [2] | |
Epoch 2022-Jan-21 (JD 2459600.5) | |
Uncertainty parameter 0 | |
Observation arc | 17.16 yr (6,266 d) |
Aphelion | 1.1042 AU |
Perihelion | 0.8980 AU |
1.0011 AU | |
Eccentricity | 0.1030 (885 wrt Earth)[lower-alpha 1] |
1.002 yr (365.9 d) | |
107.17° | |
0° 59m 2.4s / day | |
Inclination | 7.7889° |
66.014° | |
305.66° | |
Earth MOID | 0.033 AU (13 LD) |
Physical characteristics | |
Mean diameter | |
0.467±0.008 h[lower-alpha 2] | |
0.20 (assumed)[5] | |
S (assumed)[5] | |
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