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This paper provides a catalogue of stars, quasars, and galaxies for theSouthern Photometric Local Universe Survey Data Release 2 (S-PLUS DR2) in theStripe 82 region. We show that a 12-band filter system (5 Sloan-like and 7narrow bands) allows better performance for object classification than theusual analysis based solely on broad bands (regardless of infraredinformation). Moreover, we show that our classification is robust againstmissing values. Using spectroscopically confirmed sources retrieved from theSloan Digital Sky Survey DR16 and DR14Q, we train a random forest classifierwith the 12 S-PLUS magnitudes + 4 morphological features. A second randomforest classifier is trained with the addition of the W1 (3.4 $\mu$m) and W2(4.6 $\mu$m) magnitudes from the Wide-field Infrared Survey Explorer (WISE).Forty-four percent of our catalogue have WISE counterparts and are providedwith classification from both models. We achieve 95.76% (52.47%) of quasarpurity, 95.88% (92.24%) of quasar completeness, 99.44% (98.17%) of star purity,98.22% (78.56%) of star completeness, 98.04% (81.39%) of galaxy purity, and98.8% (85.37%) of galaxy completeness for the first (second) classifier, forwhich the metrics were calculated on objects with (without) WISE counterpart. Atotal of 2,926,787 objects that are not in our spectroscopic sample werelabelled, obtaining 335,956 quasars, 1,347,340 stars, and 1,243,391 galaxies.From those, 7.4%, 76.0%, and 58.4% were classified with probabilities above80%. The catalogue with classification and probabilities for Stripe 82 S-PLUSDR2 is available for download.

On the discovery of stars, quasars, and galaxies in the Southern Hemisphere with S-PLUS DR2