(29075) 1950 DA

(29075) 1950 DA
Radar image of 1950 DA taken at Arecibo in March 2001, from a distance of 22 LD or 0.052 AU
Discovery[1]
Discovered byCarl A. Wirtanen
Discovery siteLick Obs.
Discovery date23 February 1950
Designations
(29075) 1950 DA
1950 DA · 2000 YK66
NEO · Apollo · PHA[1][2] · risk listed
Orbital characteristics[2]
Epoch 31 March 2024 (JD 2460400.5)
Uncertainty parameter 0
Observation arc73.61 yr (26,885 d)
Aphelion2.5614 AU
Perihelion0.8355 AU
1.6985 AU
Eccentricity0.5081
2.214 yr (809 d)
134.33°
0° 26m 43.08s / day
Inclination12.17°
356.64°
224.70°
Earth MOID0.04011 AU (15.609 LD)
Proper orbital elements[3]
Precession of perihelion
13.655 arcsec / yr
Precession of the ascending node
−35.824 arcsec / yr
Physical characteristics
Dimensions1.39 km × 1.46 km × 1.07 km[4]
Mass>4×1012 kg[a]
Mean density
>3.5 g/cm3[4]
2.12160±0.00004 h[4]

(29075) 1950 DA (provisional designation 1950 DA) is a risk-listed asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group, approximately 1.3 kilometers (0.81 miles) in diameter.[4] It once had the highest known probability of impacting Earth.[11] In 2002, it had the highest Palermo rating with a value of 0.17 and a probability of 1 in 306 (0.33%) for a possible collision in 2880.[12][5] Since that time, the estimated risk has been updated several times. In December 2015, the odds of an Earth impact were revised to 1 in 8,300 (0.012%) with a Palermo rating of −1.42.[11] As of November 2024, it is listed on the Sentry Risk Table with the highest cumulative Palermo rating of -0.92.[13][14] 1950 DA is not assigned a Torino scale rating, because the 2880 date is over 100 years in the future. As of 21 November 2024, the odds of an Earth impact reached 1 in 2,600 (0.039%).[13][11]

  1. ^ a b c Cite error: The named reference MPC-object was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference jpldata was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Proper was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Busch-2007b was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Giorgini-2002 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Mainzer-2016 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Rivkin-2005a was invoked but never defined (see the help page).
  8. ^ a b c d Cite error: The named reference Dandy-2003 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference lcdb was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Neodys was invoked but never defined (see the help page).
  11. ^ a b c Cite error: The named reference impact-risk-summary was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference NEO-1950DA was invoked but never defined (see the help page).
  13. ^ a b Cite error: The named reference risk-table was invoked but never defined (see the help page).
  14. ^ "Impact threat analysis update completed for 1950 DA". European Space Agency. 29 March 2022.


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