The ALCDEF site has been moved to a new hosting service that allows for
more than enough storage space and faster access. Access the site via the secure link https://alcdef.org. It is no longer required
to use an intermediate link.
The EPOCH keyword is being deprecated and replaced by EQUINOX. Existing programs that generate EPOCH will still work as will upload files using EPOCH. If using a custom program to read/write ALCDEF files, it should be updated to use EQUINOX. As of 2021 July 2, downloaded lightcurve files will use the EQUINOX keyword.
Simple-ALCDEF Lightcurve Data Upload
Change in S-ALCDEF 2.2:
Single observations in a lightcurve block are no longer allowed.
Each lightcurve block must have at least 2, preferably 5 or more, observations.
If not named and/or numbered, objects must have an MPC designation. Do not submit data for NEOCP
objects or those using a custom designation.
View the ALCDEF standards documentation,
which describes the data and formatting for the values associated with the keywords in the two data sections.
An appendix details the requirements for submitting "simple" data.
The fields in the Required Data section will apply to all submitted dataexcept for the ALLOWSHARING and SUBMITPDS settings. These can be altered with metadata overrides. All other settings are fixed.
The fields in the Base Data section will be applied to all light curve blocks unless their
corresponding keywords appear within a given light curve block. This allows, e.g., submitting data for multiple
asteroids or filters within the same file.
Please limit files to approximately 250 KB or less in order to avoid overloading site resources.
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Brian D. Warner. All rights reserved. External pages are the property of their respective owners, who are solely responsible for their contents This site is best viewed at 1600x900 or greater Providing false and/or misleading information, or attempting to
submit malicious code anywhere on this site is strictly prohibited. The ALCDEF site has been made possible in large part by grants from NASA and/or the NSF