**About SDSS:** Sloan Digital Sky Survey (SDSS) maps one-quarter of the entire sky in detail, determining the positions and absolute brightnesses of hundreds of millions of celestial objects. It also measures distances to more than a million galaxies and quasars. **About Skyserver:** SkyServer brings you the entire public database of the Sloan Digital Sky Survey free of charge. **CONTENT** This file contains more than 100k observation of various objects from SDSS Skyserver DR12 database. As seen, this dataset contains 17 features and 1 target variable. **For Python users, the [sdsspy](http://code.google.com/p/sdsspy/) package provides “sdsspy.util.objid()” and “sdsspy.util.photoid_extract()” to convert RUN, CAMCOL, FIELD, ID, RERUN into objID and back, respectively.** **For more information [click here](https://www.sdss.org/dr12/help/glossary/).**