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.[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
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 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. "2022 FD1". Minor Planet Center. Retrieved 26 March 2022.
    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. 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. "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. "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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