November 1, 1991 Journal article Open Access

Hunten, D. M.; Kozlowski, R. W. H.; Sprague, A. L.

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{
  "DOI": "10.1029/91gl02543", 
  "author": [
    {
      "family": "Hunten, D. M."
    }, 
    {
      "family": "Kozlowski, R. W. H."
    }, 
    {
      "family": "Sprague, A. L."
    }
  ], 
  "issued": {
    "date-parts": [
      [
        1991, 
        11, 
        1
      ]
    ]
  }, 
  "abstract": "Over the 3\u2010day period from 12 to 14 October, 1990, the sodium abundance in the lunar atmosphere at 80\u00b0 South increased by 60%, while interspersed measurements at the equator showed no substantial change. The source is suggested to be an unknown meteor shower with a radiant near the south ecliptic pole. A low relative velocity of \u223c20 km/sec, combined with small particle masses, would keep the shower below the detectability threshold of radar. The stream could evolve from a reasonable asteroidal or cometary orbit with perihelion somewhat greater than 1 astronomical unit (AU) and a major axis of a few AU. The short residence time of lunar sodium makes it much more favorable than the terrestrial sodium layer for detection of such an event.", 
  "title": "A possible meteor shower on the Moon", 
  "type": "article-journal", 
  "id": "1231305"
}