2022 FD1

2022 FD₁ is a small, metre-sized Apollo near-Earth asteroid that was eclipsed by Earth and made its closest approach 8,470 km (5,260 mi) from Earth's surface on 25 March 2022.^[a] It entered Earth's shadow at 8:10 UTC and became invisible until egress at 8:45 UTC.^[5] Its brightness from Earth reached a peak apparent magnitude of 13 shortly before closest approach at 09:13 UTC.^[6] By that time, the asteroid was moving at a speed of 18.5 km/s (11.5 mi/s) relative to Earth and was located in the far Southern hemisphere sky.^[4][6]

2022 FD₁

Discovery[1][2]
Discovered by	K. Sárneczky
Discovery site	Piszkéstető Stn.
Discovery date	24 March 2022
Designations
MPC designation	2022 FD1
Alternative designations	Sar2594[3]
Minor planet category	NEO · Apollo[4][1]
Orbital characteristics[4]
Epoch 21 January 2022 (JD 2459600.5)
Uncertainty parameter 6
Observation arc	8.4 hours[1]
Aphelion	2.653 AU
Perihelion	0.719 AU
Semi-major axis	1.686 AU
Eccentricity	0.5735
Orbital period (sidereal)	2.19 yr (800 days)
Mean anomaly	309.949°
Mean motion	0° 27m 0.765s / day
Inclination	9.446°
Longitude of ascending node	4.374°
Argument of perihelion	256.448°
Earth MOID	0.000168 AU (25,100 km)
Jupiter MOID	2.51 AU
Physical characteristics
Mean diameter	2–4 m[3]
Absolute magnitude (H)	31.02±0.28[4]

2022 FD₁ was discovered on 24 March 2022, by astronomer Krisztián Sárneczky at Konkoly Observatory's Piszkéstető Station in Budapest, Hungary.^[2] It was his next near-Earth asteroid discovery after the impactor 2022 EB5 from early March 2022.^[3]

Animation of 2022 FD1 around Sun
  Sun ·   Earth ·   2022 FD1

Orbital Elements

Parameter	Epoch	Period (p)	Aphelion (Q)	Perihelion (q)	Semi-major axis (a)	Eccentricity (e)	Inclination (i)
Units		(days)	AU				(°)
Pre-flyby	2021 March 13[4]	928	2.863	0.790	1.863	0.567	9.440
Post-flyby	2022-Dec-17[1][6]	795	2.610	0.751	1.681	0.553	4.490

Notes

1. Earth has a radius of 6,371 km and 2022 FD₁ nominally passed about 14,845+8
   −7 km from the center of Earth. The asteroid's distance from Earth's surface at closest approach is the difference between the asteroid closest approach radius and Earth's radius. (14,845 – 6,371 = 8,474)