2023 BU

2023 BU
Radar image of 2023 BU by the Goldstone Solar System Radar on 29 January 2023
Discovery[1][2]
Discovered byGennadiy Borisov
Discovery siteMARGO, Nauchnyi, Crimea
Discovery date21 January 2023
Designations
2023 BU
gb00553
NEO · Apollo
Orbital characteristics[3]
Epoch 25 February 2023 (JD 2460000.5)
(Post-flyby orbit)
Uncertainty parameter 1
Observation arc10 days (231 obs)[3]
Aphelion1.230 AU
Perihelion0.9840 AU
1.107 AU
Eccentricity0.1111
1.16 yr
28.7°
Inclination3.75°
125.5°
27 January 2023 04:30[4]
355.8°
Earth MOID0.00046 AU (69,000 km; 0.18 LD)
Physical characteristics
3–8 meters (CNEOS)[5]
~77 seconds[6]
29.4±0.5 (JPL)[3]
29.4 (MPC)[1]

2023 BU is a near-Earth object that passed 9,967 ± 1 km (6,193.21 ± 0.62 mi) from the centerpoint of Earth around 27 January 2023 00:29 UT.[3] Since Earth's radius is about 6,378 km (3,963 mi), it was expected to pass approximately 3,589 ± 1 km (2,230.10 ± 0.62 mi) from the surface of Earth over the southern tip of South America.[7] It passed at an altitude above low Earth orbit which is 2,000 km (1,200 mi) and below geostationary orbit which is 36,000 km (22,000 mi). The asteroid is about 3–8 meters in diameter[5] and approached Earth from the night sky. It is the fourth closest non-impacting approach known to Earth (excluding Earthgrazers) after 2020 VT4, 2020 QG, and 2021 UA1.

  1. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference MPEC-2023-B72 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference jpldata was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Perihelion was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference JPL12 was invoked but never defined (see the help page).
  6. ^ Northolt Branch Observatory: 77 seconds with an amplitude of 0.9 mag
  7. ^ Cite error: The named reference NASA20230125 was invoked but never defined (see the help page).