1. ggsky::artss15
    ARTSS1-5 X-ray Source Catalog
    csv| xlsx| json| ndjson| rda| rds
    data.frame|1545 x 11
  2. ggsky::equator
    Celestial equator is the great circle with declination equal to 0 deg.
    csv| xlsx| json| ndjson| rda| rds
    data.frame|360 x 3