(5496) 1973 NA

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(5496) 1973 NA is an Apollo-type near-Earth minor planet.[1] It was discovered by Eleanor F. Helin at the Palomar Observatory in San Diego County, California, on July 4, 1973.[1] This was two days after the asteroid had passed 0.07984 AU (11,944,000 km; 7,422,000 mi) from Earth.[1] It was tracked for more than a month, but was not seen again until 1992 when it was recovered as 1992 OA by Siding Spring Observatory.[2] It is one of the first near-Earth asteroids ever discovered.[3] The asteroid is roughly 3 km in diameter.[4]

5496 (1973 NA) is expected to be related to the Quadrantids January meteor shower.[5]


  1. ^ a b c "JPL Small-Body Database Browser: 5496 (1973 NA)". Jet Propulsion Laboratory. 
  2. ^ IAU Minor Planet Center
  3. ^ 1977MPBu....4...36W
  4. ^ NEODyS
  5. ^ Williams, Iwan P.; Collander-Brown, S. J. (1998). "The parent of the Quadrantid meteoroid stream". Monthly Notices of the Royal Astronomical Society 294: 127–138. doi:10.1046/j.1365-8711.1998.01168.x.