The search for habitable planets has revealed many planets that can vary greatly from an Earth analog environment. These include highly eccentric orbits, giant planets, different bulk densities, relatively active stars, and evolved stars. This work catalogs all planets found to reside in the habitable zone (HZ) and provides HZ boundaries, orbit characterization, and the potential for spectroscopic follow-up observations. Demographics of the HZ planets are compared with a full catalog of exoplanets. Extreme planets within the HZ are highlighted, and how their unique properties may affect their potential habitability is discussed. Kepler-296 f is the most eccentric <~2R{Earth} planet that spends 100% of its orbit in the HZ. HD106270b and HD38529c are the most massive planets (~<13MJ) that orbit within the HZ, and are ideal targets for determining the properties of potential hosts of HZ exomoons. These planets, along with the others highlighted, will serve as special edge cases to the Earth-based scenario, and observations of these targets will help test the resilience of habitability outside the standard model. The most promising observational HZ target that is known to transit is GJ414Ab. Of the transiting, ~<2R{Earth} HZ planets, LHS1140b, TRAPPIST-1d, and K2-3d are the most favorable. Of the nontransiting HZ planets, HD102365b and 55Cncf are the most promising, and the best nontransiting candidates that have <~2R{Earth} are GJ667Cc, Wolf1061c, Ross508b, Teegarden's Star b, and ProximaCenb.

Cone search capability for table J/AJ/165/34/table1 (Habitable Zone Planet Properties and Host stellar properties)