{"id":6418,"date":"2025-02-16T14:24:00","date_gmt":"2025-02-16T22:24:00","guid":{"rendered":"https:\/\/www.hmc.edu\/physics\/?post_type=physics_publications&#038;p=6418"},"modified":"2026-01-23T08:56:23","modified_gmt":"2026-01-23T16:56:23","slug":"updates-to-the-featureclassifier-in-the-stability-of-planetary-orbital-configurations-klassifier","status":"publish","type":"physics_publications","link":"https:\/\/www.hmc.edu\/physics\/research\/publications\/updates-to-the-featureclassifier-in-the-stability-of-planetary-orbital-configurations-klassifier\/","title":{"rendered":"Updates to the FeatureClassifier in the Stability of Planetary Orbital Configurations Klassifier"},"content":{"rendered":"\n<p>Elio Thadhani, Yanming Ba (\u5df4\u71d5\u9e23), Hanno Rein, and Daniel Tamayo<\/p>\n\n\n\n<p><a href=\"https:\/\/iopscience.iop.org\/article\/10.3847\/2515-5172\/adb150\">Updates to the FeatureClassifier in the Stability of Planetary Orbital Configurations Klassifier<\/a><\/p>\n\n\n\n<p>Research Notes of the AAS 9, 27 (2025).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"artAbst\">Abstract<\/h2>\n\n\n\n<p>The Stability of Planetary Orbital Configurations Klassifier (SPOCK) package collects machine learning models for predicting the stability and collisional evolution of compact planetary systems. In this paper we explore improvements to SPOCK\u2019s binary stability classifier (FeatureClassifier), which predicts orbital stability by collecting data over a short <em>N<\/em>-body integration of a system. We find that by using a system-specific timescale (rather than a fixed 10<sup>4<\/sup> orbits) for the integration, and by using this timescale as an additional feature, we modestly improve the model\u2019s AUC metric from 0.943 to 0.950 (AUC = 1 for a perfect model). We additionally discovered that \u224810% of <em>N<\/em>-body integrations in SPOCK\u2019s original training data set were duplicated by accident, and that &lt;1% were misclassified as stable when they in fact led to ejections. We provide a cleaned data set of 100,000+ unique integrations, release a newly trained stability classification model, and make minor updates to the API.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Elio Thadhani, Yanming Ba (\u5df4\u71d5\u9e23), Hanno Rein, and Daniel Tamayo Updates to the FeatureClassifier in the Stability of Planetary Orbital [&hellip;]<\/p>\n","protected":false},"author":333,"featured_media":0,"template":"","publication_author":[29],"class_list":["post-6418","physics_publications","type-physics_publications","status-publish","hentry","publication_author-tamayo"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications\/6418","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/physics_publications"}],"about":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/types\/physics_publications"}],"author":[{"embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/users\/333"}],"wp:attachment":[{"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/media?parent=6418"}],"wp:term":[{"taxonomy":"publication_author","embeddable":true,"href":"https:\/\/www.hmc.edu\/physics\/wp-json\/wp\/v2\/publication_author?post=6418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}