Following the practice adopted during the Kepler prime mission and continued during the Kepler extended mission, confirmed planets with K2 data will receive a K2 designation with the format K2-1 b. In general, these numbers are easier to remember than the corresponding EPIC designations and are intended to clearly indicate a class of objects that have been confirmed or validated as planets. As with the Kepler numbers, the K2 project has asked NExScI to administer and track this process.
K2 numbers will be assigned to all confirmed or validated planets where K2 data of that object appear in accepted, peer-reviewed journal papers. K2 numbers will also be assigned to previously known planets, but only after the K2 data have been published. All planets with assigned K2 numbers will be included in the confirmed planets table at the NASA Exoplanet Archive. See the K2 Names interactive table for all confirmed planets that are assigned K2 numbers.
To request K2 numbers for use in a published paper, please use the following procedure:
Letters for multiple planet systems will be assigned by increasing orbital period.
Please note the editors of most major astronomical journals have approved this procedure. Newly assigned K2 numbers will be posted to the Exoplanet Archive once the paper is publicly available (at the journal, astro-ph or other widely available site).
Last updated: 20 October 2016