Possible Impact Phenomena (PIPs)

  • Brian Cudnik
Part of the Astronomers' Observing Guides book series (OBSERVING)


This chapter presents a catalog of documented events on the Moon likely (or possibly) resembling impact phenomena. These events are referred to by the author as possible impact phenomena (PIPs).The catalog was assembled from several different sources, listed later, and is divided into sections by century, beginning with the twelfth century. Naturally as one approaches the present day, the number of reported events seems to rise exponentially as the number of observers, as well as the efficiency of the methods of observations, increases. For example, in the entire seventeenth century, two events were recorded compared with 19 during the 1950s.


Impact Event Annual Shower Meteor Shower Meteor Impact Bright Flash 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 5.
    Middlehurst, B. M.; Burlee, J.M.; Moore, P.; and Welther, B. L. (1968) Chronological Catalog of Lunar Events. NASA Technical Report R-277.Google Scholar
  2. 6.
    Cameron WS (2006) Lunar Transient Phenomena Catalog Extensions NSSDC/WDC-A-R&S vol 78-03.Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Brian Cudnik
    • 1
  1. 1.HoustonUSA

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