Editing Light curve (section)

=== Asteroid lightcurve database ===

==== {{anchor|LCDB quality code}} Light curve quality code ====

The ''Asteroid Lightcurve Database'' (LCDB) of the Collaborative Asteroid Lightcurve Link (CALL) uses a numeric code to assess the quality of a period solution for minor planet light curves (it does not necessarily assess the actual underlying data). Its quality code parameter ''U'' ranges from 0 (incorrect) to 3 (well-defined):<ref name="LCDB"/>
* ''U'' = 0 → Result later proven incorrect
* ''U'' = 1 → Result based on fragmentary light curve(s), may be completely wrong.
* ''U'' = 2 → Result based on less than full coverage. Period may be wrong by 30 percent or ambiguous. 
* ''U'' = 3 → Secure result within the precision given. No ambiguity.
* ''U'' = n.a. → Not available. Incomplete or inconclusive result.

A trailing plus sign (+) or minus sign (−) is also used to indicate a slightly better or worse quality than the unsigned value.<ref name="LCDB" />