2023 DW

2023 DW
Discovery[1][2]
Discovered byGeorges Attard and Alain Maury
Discovery siteSan Pedro de Atacama
Discovery date26 February 2023
Designations
2023 DW
3BP2721[2]
Orbital characteristics[3]
Epoch 2023-Feb-25 (JD 2460000.5)
Uncertainty parameter 6
Observation arc20 days
Aphelion1.145 AU (Q)
Perihelion0.495 AU (q)
0.820 AU (a)
Eccentricity0.397 (e)
0.742 years (271 days)
120.0° (M)
Inclination5.81° (i)
326.1° (Ω)
2022-Nov-26
40.4° (ω)
Earth MOID0.0005 AU (75 thousand km)
Venus MOID0.03 AU (4.5 million km)[4]
Jupiter MOID4.3 AU (640 million km)
Physical characteristics
  • ≈47 m (150 ft)[5]
  • 37–82 meters[a]
24.3 (MPC)[4]

2023 DW is a near-Earth asteroid of the Aten group. It is approximately 50 meters (160 feet) in diameter, roughly the size of the asteroid that caused the Tunguska event,[a] and was discovered by Georges Attard and Alain Maury, from the MAP (Maury/Attard/Parrott) asteroid search program in San Pedro de Atacama on 26 February 2023, when it was 0.07 AU (10 million km) from Earth.[1] On 28 February 2023, with an observation arc of 1.2 days, it was rated 1 on the Torino scale for a virtual impactor on 14 February 2046 at 21:36 UTC.[6] The nominal approach is expected to occur about eight hours before the impact scenario at 14 February 2046 13:15 ± 72 minutes.[3] Between 5–8 March, the asteroid was not observed as it was within 40 degrees of the waxing gibbous moon.[7] On 14 March 2023 the European Space Agency was the first to drop to a Torino scale rating of 0.[8] Sentry dropped to a Torino scale rating of 0 on 16 March 2023.[9] It was completely removed from both risk tables on 20 March 2023.[10]

2023 DW currently orbits the Sun once every 271 days.[3] It came to perihelion (closest approach to the Sun) on 26 November 2022, and then approached Earth from the direction of the Sun making closest Earth approach on 18 February 2023 at distance of about 8.7 million km.[3]

  1. ^ a b Cite error: The named reference MPEC2023-D71 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Maury 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. ^ a b Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Sentry20 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Sentry1 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference moon was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference esa-risk20230314 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Sentry17B was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference removed was invoked but never defined (see the help page).


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