HATS-19b orbits a slightly evolved star with ~3.31 times the Sun's luminosity. The planet has ~1.66 times the radius of Jupiter and its orbital period is 4.570 days. HATS-19b also has ~0.427 times the mass of Jupiter, giving it ~12 percent the density of water. The equilibrium temperature on HATS-19b is estimated to be ~1570 K.
HATS-20b orbits a Sun-like star with ~0.612 times the Sun's luminosity. The planet has ~0.776 times the radius of Jupiter and its orbital period is 3.799 days. HATS-20b also has ~0.273 times the mass of Jupiter, giving it ~73 percent the density of water. The equilibrium temperature on HATS-20b is estimated to be ~1147 K.
HATS-21b orbits a Sun-like star with ~0.98 times the Sun's luminosity. The planet has ~1.123 times the radius of Jupiter and its orbital period is 3.554 days. HATS-21b also has ~0.332 times the mass of Jupiter, giving it ~29 percent the density of water. The equilibrium temperature on HATS-21b is estimated to be ~1284 K.
Reference:
Bhatti et al. (2016), "HATS-19b, HATS-20b, HATS-21b: Three Transiting Hot-Saturns Discovered by the HATSouth Survey", arXiv:1607.00322 [astro-ph.EP]