Primary and secondary information on comets and observing comets:
- Astronomical headlines from the publications of the CBAT and MPC regarding comets and other objects.
- Currently-observable comets: ephemerides, elements, and links to magnitude estimates
- The most recent observation of each recently observed comet (see these notes).
- Recent comet magnitude estimates
- The brightest comets seen since 1935.
- The brightest comets of the last two centuries: John Bortle’s “Bright-Comet Chronicles” are now available at this website.
- Primer on Comet Names, Comet Designations, Comet Nomenclature
- Correspondence of Old- and New-Style Designations
- Permanent periodic-comet numbers (new-style), in alphabetical order (including the old name-numerals) or in numerical order (without the old name-numerals)
- List of Comet Designations and Names
- Recent comets noted to have split
- What is The International Comet Quarterly?
Additional information on comets (and related phenomena):
- Observing comets, and observations of comets
- Ephemerides/elements for all currently-observable comets
- Brief introduction to comet magnitudes/photometry
- Definition of comet “magnitude”
- Helpful information on observing for contributors
- ICQ format for contributors
- Recommendations for reference-magnitude sources (to use for comet-magnitude estimates)
- The ICQ Comet Handbook, a special annual publication giving orbital elements, ephemerides, predicted brightnesses, and (starting with the 2007 edition) observability/elongation diagrams for comets.
- The 1997 edition of the ICQ Guide to Observing Comets is now out of print, but we hope to have a revised edition available soon. We have had a great many requests for this popular item.
- How to Report a Comet Discovery
- Lists and Plots regarding Comets
- Glossary of comet and astronomical terms
- Index to the CBAT/MPC/ICQ pages (under revision)
- Recommended links to other Websites that contain useful and original comet (and some meteor) material/information
- Recommended publications to general information on comets
Trans-Neptunian Objects (TNOs)
- Information on atmospheric fireballs (bright meteors) and meteorites
- Information on the scourge of light pollution, and what you can do to help make the sky a better place to view comets in! Some pages were produced and made available here because of the prominence of this problem to cometary observers.
About This Service
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New England Light Pollution Advisory Group (NELPAG)