2022 FD1
Discovery[1][2]
Discovered byK. Sárneczky
Discovery sitePiszkéstető Stn.
Discovery date24 March 2022
Designations
2022 FD1
Sar2594[3]
NEO · Apollo[4][1]
Orbital characteristics[4]
Epoch 21 January 2022 (JD 2459600.5)
Uncertainty parameter 6
Observation arc8.4 hours[1]
Aphelion2.653 AU
Perihelion0.719 AU
1.686 AU
Eccentricity0.5735
2.19 yr (800 days)
309.949°
0° 27m 0.765s / day
Inclination9.446°
4.374°
256.448°
Earth MOID0.000168 AU (25,100 km)
Jupiter MOID2.51 AU
Physical characteristics
Mean diameter
2–4 m[3]
31.02±0.28[4]

    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.[lower-alpha 1] 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]

    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)

    References

    1. 1 2 3 4 "2022 FD1". Minor Planet Center. Retrieved 26 March 2022.
    2. 1 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.
    3. 1 2 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.
    4. 1 2 3 4 5 "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.
    5. ↑ Gray, Bill J. (25 March 2022). "Re: Total NEO eclipse!". groups.io. Archived from the original on 26 March 2022. Retrieved 26 March 2022.
    6. 1 2 3 "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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