World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0030102773
Reproduction Date:

Title: 238P/Read  
Author: World Heritage Encyclopedia
Language: English
Subject: Main-belt comet, Antitail, Comet Ikeya–Murakami, C/1989 X1, 120P/Mueller
Collection: Astronomical Objects Discovered in 2005, Encke-Type Comets, Main-Belt Comets, Periodic Comets
Publisher: World Heritage Encyclopedia


238P/Read (P/2005 U1) is a main-belt comet[1][2] discovered on 2005 October 24 by M. T. Read using the Spacewatch 36 inch telescope on Kitt Peak. It has an orbit within the asteroid belt and has displayed the coma of a traditional comet. It fits the definition of an Encke-type comet with (TJupiter > 3; a < aJupiter).[3]

Before it was discovered 238P came to perihelion on 2005 July 27.[3] When it was discovered on 2005 October 24, it showed vigorous cometary activity until 2005 December 27.[4] Outgassing likely began at least 2 months before discovery.[4] The activity of 238P is much stronger than 133P/Elst-Pizarro and 176P/LINEAR.[4] This may indicate that the impact assumed to have triggered 238P's activity occurred very recently.[4]

Observations of 238P when it was inactive in 2007 suggests that it has a small nucleus only about 0.6 km in diameter.[4]

It last came to perihelion on 2011 March 10,[4] and will next come to perihelion on 2016 October 22.[5][6]


  1. ^ (older 2010 site)
  2. ^
  3. ^ a b
  4. ^ a b c d e f
  5. ^
  6. ^

External links

  • Orbital simulation from JPL (Java) / Horizons Ephemeris
  • Elements and Ephemeris for 238P/Read – Minor Planet Center
  • 238P/Read at the Minor Planet Center's Database
  • Main-Belt Comet 238P/Read Revisited (arXiv:1106.0045 : 31 May 2011)
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from Project Gutenberg are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.