2022 YO1

2022 YO₁ is a small and harmless near-Earth object that will pass within 0.014 AU (2.1 million km) of Earth around 17 December 2024.^[3] At 17 December 2024 06:14 UT it has a 0.23% (1-in-430) chance of impacting Earth.^[2] It is estimated to be 3-meters in diameter which would make an impact comparable to 2008 TC3. It has a very short observation arc of 0.4 days.^{[needs update]} It was first imaged on 17 December 2022 07:07,^[1] when it was 0.004 AU (600 thousand km) from Earth, and made its closest approach to Earth at a distance of 0.00018 AU (27,000 km) shortly after on the same day.^[3]

2022 YO₁

Discovery[1]
Discovered by	Catalina Sky Survey
Discovery date	17 December 2022
Designations
MPC designation	2022 YO1
Minor planet category	NEO Apollo risk listed[2]
Orbital characteristics[3]
Epoch 2023-Feb-25 (JD 2460000.5)
Uncertainty parameter 6
Observation arc	0.4 days[2]
Aphelion	2.38 AU (Q)
Perihelion	0.8009 AU (q)
Semi-major axis	1.588 AU (a)
Eccentricity	0.4957 (e)
Orbital period (sidereal)	2.001 years
Mean anomaly	12.42° (M)
Inclination	13.62° (i)
Longitude of ascending node	85.50° (Ω)
Time of perihelion	2023-Jan-30[3]
Argument of perihelion	63.99° (ω)
Earth MOID	0.00034 AU (51,000 km)
Jupiter MOID	2.7 AU (400,000,000 km)
Physical characteristics
Dimensions	~3 m (10 ft)[2] 3–6 meters (CNEOS)
Absolute magnitude (H)	30[4]

At the time of the virtual impactor (17 December 2024 06:14) the asteroid is expected to be 0.0055 AU (820 thousand km) from Earth but has an uncertainty region of ±1.5 million km (0.01 AU).^[5] The nominal approach to Earth is expected to occur about nine hours later at 17 December 2024 15:41 at a distance of 0.005 AU (750 thousand km).^{[3][needs update]}

2024-Dec-17 06:14 Virtual Impactor^[2]

Date	Impact probability	JPL Horizons nominal geocentric distance (AU)	NEODyS nominal geocentric distance (AU)	MPC[6] nominal geocentric distance (AU)	uncertainty region (3-sigma)
2024-12-17 06:14	0.23%	0.0055 AU (820 thousand km)[5]	0.0051 AU (760 thousand km)[7]	0.0056 AU (840 thousand km)	± 1.5 million km[5]

Line of variation (LOV) and different closest approaches

Date and time	Nominal closest approach	Reference
17 December 2024 06:14	Impact scenario	Sentry[2]
17 December 2024 14:15	0.0043 AU (640 thousand km)	ESA[8]
17 December 2024 15:41	0.0051 AU (760 thousand km)	JPL SBDB[3]

It reached perihelion (closest approach to the Sun) on 30 January 2023.