2022 FD₁

2022 FD₁
Discovery
Discovered by	K. Sárneczky
Discovery site	Piszkéstető Stn.
Discovery date	24 March 2022
Designations
MPC designation	2022 FD1
Alternative designations	Sar2594
Minor planet category	NEO · Apollo
Orbital characteristics
	Epoch 21 January 2022 (JD 2459600.5)
	Uncertainty parameter 6
Observation arc	8.4 hours
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
Absolute magnitude (H)	31.02±0.28

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 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]

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

^ 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)

References

^ ^a ^b ^c ^d "2022 FD1". Minor Planet Center. Retrieved 26 March 2022.
^ ^a ^b "MPEC 2022-F48 : 2022 FD1". Minor Planet Electronic Circular. Minor Planet Center. 25 March 2022. Archived from the original on 26 March 2022. Retrieved 26 March 2022.
^ ^a ^b ^c Whitt, Kelly Kizer (25 March 2022). "Whoa! Another asteroid whizzes past Earth hours after discovery". EarthSky. Archived from the original on 26 March 2022. Retrieved 26 March 2022.
^ ^a ^b ^c ^d ^e "JPL Small-Body Database Browser: (2022 FD1)" (2022-03-25 last obs.). Jet Propulsion Laboratory. Archived from the original on 6 October 2021. Retrieved 26 March 2022.
^ Gray, Bill J. (25 March 2022). "Re: Total NEO eclipse!". groups.io. Archived from the original on 26 March 2022. Retrieved 26 March 2022.
^ ^a ^b ^c "JPL Horizons On-Line Ephemeris for 2022 FD1 on 2022-Mar-25". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Archived from the original on 26 March 2022. Retrieved 26 March 2022. Ephemeris Type: Elements and Center: 500. Note that there is no magnitude drop during the Earth eclipse between 8:10–8:45 UT as JPL Horizons does not take Earth's shadow into account.

External links

2022 FD1 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
2022 FD1 at ESA–space situational awareness
- Ephemerides · Observations · Orbit · Physical properties · Summary
2022 FD1 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit viewer · Orbit parameters · Physical parameters

[surface-5] 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)

[MPC-object-1] "2022 FD1". Minor Planet Center. Retrieved 26 March 2022.

[MPEC-2022-F48-2] "MPEC 2022-F48 : 2022 FD1". Minor Planet Electronic Circular. Minor Planet Center. 25 March 2022. Archived from the original on 26 March 2022. Retrieved 26 March 2022.

[earthsky-3] Whitt, Kelly Kizer (25 March 2022). "Whoa! Another asteroid whizzes past Earth hours after discovery". EarthSky. Archived from the original on 26 March 2022. Retrieved 26 March 2022.

[jpldata-4] "JPL Small-Body Database Browser: (2022 FD1)" (2022-03-25 last obs.). Jet Propulsion Laboratory. Archived from the original on 6 October 2021. Retrieved 26 March 2022.

[Gray-mpml-6] Gray, Bill J. (25 March 2022). "Re: Total NEO eclipse!". groups.io. Archived from the original on 26 March 2022. Retrieved 26 March 2022.

[horizons-7] "JPL Horizons On-Line Ephemeris for 2022 FD1 on 2022-Mar-25". JPL Horizons On-Line Ephemeris System. Jet Propulsion Laboratory. Archived from the original on 26 March 2022. Retrieved 26 March 2022. Ephemeris Type: Elements and Center: 500. Note that there is no magnitude drop during the Earth eclipse between 8:10–8:45 UT as JPL Horizons does not take Earth's shadow into account.

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