Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       Caelum veter. - region of the fixed stars
         (Constellation) Hydra veter. - Hya
           083739.4+054213 (Star system) δ Hydrae
           083845.4+032029 (Star) σ Hydrae
           084313.5+032355 (Star) η Hydrae
           084646.6+062508 (Star system) ε Hydrae
           084826.0+055016 (Star system) ρ Hydrae
           085523.6+055644 (Star) ζ Hydrae
           090558.4+050532 (Star) ω Hydrae
           091421.9+021851 (Star system) θ Hydrae
           092735.2-083931 (Star system) α Hydrae - Alphard
           092908.9-024608 (Star system) τ¹ Hydrae
           093158.9-011106 (Star) τ² Hydrae
           093951.4-010834 (Star) ι Hydrae
           094018.4-141956 (Star) κ Hydrae
           095128.7-145048 (Star) υ¹ Hydrae
           100507.5-130353 (Star) υ² Hydrae
           101035.3-122115 (Star system) λ Hydrae
           102605.4-165011 (Star) μ Hydrae
           103616.7-162040 (Star system) φ² Hydrae
           103835.0-165236 (Star) φ³ Hydrae
           104937.5-161137 (Star) ν Hydrae
           110519.9-271737 (Star system) χ¹ Hydrae
           110557.6-271716 (Star) χ² Hydrae
           113300.1-315128 (Star system) ξ Hydrae
           114012.8-344441 (Star) ο Hydrae
           115254.6-335429 (Star system) β Hydrae
           130903.3-230705 (Star) ψ Hydrae
           131855.3-231018 (Star system) γ Hydrae
           140622.3-264057 (Star) π Hydrae