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keywords=asteroid, photometry, observing, asteroids, lightcurve database, asteroid lightcurve database, LCDB, ALCDEF, rotation, period, amplitude, minor planet, minor planets;
description=A database with millions of asteroid time-series photometry observations;

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alcdef database what is alcdef about asteroid lightcurves acknowledgements credits data and privacy policy special annoucements download and review the latest alcdef standards pdf 2024 march 4 the site and standard have been updated to distinguish between pan starrs and sloan ugriz filters and magbands px stands for pan starrs wile sx stands for sloan magnitudes based on the atlas star catalog tonry et al 2008 are px the epoch keyword has been 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 avoid duplicate submissions a 2025 august 1 review found almost 24 500 duplicate metadata records i e those for the same object with the same session date time filter and magband check the database before you upload if you need to submit updated data please see the alcdef documentation especially the keyword reviseddata duplicate metadata records and their associated lcdata and compstars if necessary will be purged from time to time with the most recent set based on the upload date assumed to be valid statistics and search objects lc blocks observations 24764 386822 11112060 last update 2026 05 03 15 31 41 object search required opt in and file upload you must give express permission before your data can be stored and distributed without this permission your data will not be accepted by the alcdef site you must also choose whether or not your data will be automatically made part of a periodic release from the nasa planetary data system for more information see the data and privacy policy statement and the alcdef documentation allow sharing choose no yes submit to pds choose no yes file waiting alcdefverify alcdefverify is a web based tool that runs the same verification checks used when uploading files to the alcdef database it was developed for those using programs other than mpo canopus or scripts to debug and validate their data prior to uploading the files to the alcdef database up to three files can be processed during each run it is strongly recommended that each file be defined constant keywords see section 3 of alcdef standards documentation simple alcdef s alcdef s alcdef is for those who have basic text data files e g jd magnitude magerror usually with a minimal amount of editing these files can be uploaded to the alcdef database without creating the more detailed and rigorous standard alcdef files see the alcdef documentation for details click here to go to the s alcdef upload page n b if using gaia g magnitudes you must set magband gg gaia g the single letter g can be confused with the sloan g magband there is no g filter so use filter x where x is one of the accepted filters archive download full download custom download download notes latest zip with all alcdef data created 2025 april 28 20 47 58 size 132 329 kb on after yyyy mm dd or yyyymmdd if successful a zip file is created that contains only those lightcurve blocks that were added or edited on after the date given above and a download link appears above the sumbit button due to the heavy load required to generate the zip custom downloads are limited to no more than the last 90 days https amps303 org toto togel situs toto togel viral togel online togel online slot dana slot bonanza toto slot situs toto bungaslot slot dana toto slot bandar togel rupiahtoto do not press any buttons or leave the page while waiting for the file to be generated copyright c 2010 2026 by 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