Impacts Today

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


Lunar Transient Phenomenon (LTP) is defined as a short-lived phenomenon or change observed on the Moon and can take on a number of forms such as red glows, flashes, obscurations, and abnormal albedo and shadow effects. The study of LTP implies the study of such changes that take place on the Moon’s surface. Some forms of LTP are likely triggered by lunar tides and occur within craters and around the perimeters of basins. Many forms of lunar change seem to be localized, occurring or recurring at specific locations and within specific features on the Moon’s surface. In one localized instance, an LTP took place in the crater Alphonsus, and astronomers were able to obtain a carbon spectrum from this event. The following, adapted with the permission from the online Lunar Transient Phenomena Observing Manual by David O. Darling (one can find the website using a search engine and typing the manual’s title), is a coarse classification of the numerous forms of LTP.


Lunar Surface Impact Crater Meteor Shower Mars Global Surveyor Meteoroid Impact 
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. 16.
    Malin MC Edgett KS Posiolova SM et al (2006) Catalog of New Impact Sites on Mars Formed May 1999 – March 2006 Malin Space Science Systems, Inc. San Diego, California, USA.Google Scholar
  2. 20.
    As reported in Sky and Telescope magazine, September 1973 p 146.Google Scholar
  3. 21.
    The classification of “major” events was made by the Lunar Source Book—a User’s Guide to the Moon, pp 41, 46, and 47.Google Scholar
  4. 22.
    Oberst J and Nakamura Y (1991) Icarus vol 91 p 315.CrossRefADSGoogle Scholar
  5. 23.
    Potter AE and Morgan TH (1988) Science vol 241 p 675.CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • Brian Cudnik
    • 1
  1. 1.HoustonUSA

Personalised recommendations