Moon 2000 South Pole Stereographic - ESRI:103878

WKT

PROJCS["Moon_2000_South_Pole_Stereographic", 
	GEOGCS["GCS_Moon_2000", 
		DATUM["D_Moon_2000", 
			SPHEROID["Moon_2000_IAU_IAG", 1737400.0, 0.0]], 
		PRIMEM["Reference_Meridian", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Stereographic"], 
	PARAMETER["False_Easting", 0.0], 
	PARAMETER["False_Northing", 0.0], 
	PARAMETER["Central_Meridian", 0.0], 
	PARAMETER["Scale_Factor", 1.0], 
	PARAMETER["Latitude_Of_Origin", -90.0], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["Moon_2000_South_Pole_Stereographic", 
	BASEGEOGCRS["GCS_Moon_2000", 
		DATUM["D_Moon_2000", 
			ELLIPSOID["Moon_2000_IAU_IAG", 1737400.0, 0.0]], 
		PRIMEM["Reference_Meridian", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Longitude (lon)", east, 
			ORDER[1]], 
		AXIS["Latitude (lat)", north, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Stereographic", 
		METHOD["Stereographic"], 
		PARAMETER["False_Easting", 0.0], 
		PARAMETER["False_Northing", 0.0], 
		PARAMETER["Central_Meridian", 0.0], 
		PARAMETER["Scale_Factor", 1.0], 
		PARAMETER["Latitude_Of_Origin", -90.0]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["Esri", "103878"]]

Data from @esri/proj-codes

{
  "wkid": 103878,
  "latestWkid": 103878,
  "gcsWkid": 104903,
  "macro": "PE_PCS_MOON_2000_S_POLE_STEREOGRAPHIC",
  "name": "Moon_2000_South_Pole_Stereographic",
  "wkt": "PROJCS[\"Moon_2000_South_Pole_Stereographic\",GEOGCS[\"GCS_Moon_2000\",DATUM[\"D_Moon_2000\",SPHEROID[\"Moon_2000_IAU_IAG\",1737400.0,0.0]],PRIMEM[\"Reference_Meridian\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Stereographic\"],PARAMETER[\"False_Easting\",0.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",0.0],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",-90.0],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"Moon_2000_South_Pole_Stereographic\",BASEGEOGCRS[\"GCS_Moon_2000\",DATUM[\"D_Moon_2000\",ELLIPSOID[\"Moon_2000_IAU_IAG\",1737400.0,0.0]],PRIMEM[\"Reference_Meridian\",0.0],CS[ellipsoidal,2],AXIS[\"Longitude (lon)\",east,ORDER[1]],AXIS[\"Latitude (lat)\",north,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Stereographic\",METHOD[\"Stereographic\"],PARAMETER[\"False_Easting\",0.0],PARAMETER[\"False_Northing\",0.0],PARAMETER[\"Central_Meridian\",0.0],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",-90.0]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"Esri\",\"103878\"]]",
  "description": "Moon 2000 South Pole Stereographic",
  "authority": "Esri",
  "version": "13.0.0",
  "deprecated": "no",
  "areaname": "World - S hemisphere - south of 60~S",
  "extent": {
    "slat": -90,
    "nlat": -60,
    "llon": -180,
    "rlon": 180
  }
}