St. Helena Tritan SHLG(Tritan) - EPSG:7882

WKT

PROJCS["St_Helena_Tritan_SHLG(Tritan)", 
	GEOGCS["St_Helena_Tritan", 
		DATUM["St_Helena_Tritan", 
			SPHEROID["WGS_1984", 6378137.0, 298.257223563]], 
		PRIMEM["Greenwich", 0.0], 
		UNIT["Degree", 0.0174532925199433]], 
	PROJECTION["Transverse_Mercator"], 
	PARAMETER["False_Easting", 299483.737], 
	PARAMETER["False_Northing", 2000527.879], 
	PARAMETER["Central_Meridian", -5.716666666666667], 
	PARAMETER["Scale_Factor", 1.0], 
	PARAMETER["Latitude_Of_Origin", -15.96666666666667], 
	UNIT["Meter", 1.0]]

WKT2

PROJCRS["St_Helena_Tritan_SHLG(Tritan)", 
	BASEGEOGCRS["St_Helena_Tritan", 
		DATUM["St_Helena_Tritan", 
			ELLIPSOID["WGS_1984", 6378137.0, 298.257223563]], 
		PRIMEM["Greenwich", 0.0], 
		CS[ellipsoidal, 2], 
		AXIS["Latitude (lat)", north, 
			ORDER[1]], 
		AXIS["Longitude (lon)", east, 
			ORDER[2]], 
		ANGLEUNIT["Degree", 0.0174532925199433]], 
	CONVERSION["Transverse_Mercator", 
		METHOD["Transverse_Mercator"], 
		PARAMETER["False_Easting", 299483.737], 
		PARAMETER["False_Northing", 2000527.879], 
		PARAMETER["Central_Meridian", -5.716666666666667], 
		PARAMETER["Scale_Factor", 1.0], 
		PARAMETER["Latitude_Of_Origin", -15.96666666666667]], 
	CS[Cartesian, 2], 
	AXIS["Easting (X)", east, 
		ORDER[1]], 
	AXIS["Northing (Y)", north, 
		ORDER[2]], 
	LENGTHUNIT["Meter", 1.0], 
	ID["EPSG", "7882"]]

Data from @esri/proj-codes

{
  "wkid": 7882,
  "latestWkid": 7882,
  "gcsWkid": 7881,
  "macro": "PE_PCS_ST_HELENA_TRITAN_SHLG_TRITAN",
  "name": "St_Helena_Tritan_SHLG(Tritan)",
  "wkt": "PROJCS[\"St_Helena_Tritan_SHLG(Tritan)\",GEOGCS[\"St_Helena_Tritan\",DATUM[\"St_Helena_Tritan\",SPHEROID[\"WGS_1984\",6378137.0,298.257223563]],PRIMEM[\"Greenwich\",0.0],UNIT[\"Degree\",0.0174532925199433]],PROJECTION[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",299483.737],PARAMETER[\"False_Northing\",2000527.879],PARAMETER[\"Central_Meridian\",-5.716666666666667],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",-15.96666666666667],UNIT[\"Meter\",1.0]]",
  "wkt2": "PROJCRS[\"St_Helena_Tritan_SHLG(Tritan)\",BASEGEOGCRS[\"St_Helena_Tritan\",DATUM[\"St_Helena_Tritan\",ELLIPSOID[\"WGS_1984\",6378137.0,298.257223563]],PRIMEM[\"Greenwich\",0.0],CS[ellipsoidal,2],AXIS[\"Latitude (lat)\",north,ORDER[1]],AXIS[\"Longitude (lon)\",east,ORDER[2]],ANGLEUNIT[\"Degree\",0.0174532925199433]],CONVERSION[\"Transverse_Mercator\",METHOD[\"Transverse_Mercator\"],PARAMETER[\"False_Easting\",299483.737],PARAMETER[\"False_Northing\",2000527.879],PARAMETER[\"Central_Meridian\",-5.716666666666667],PARAMETER[\"Scale_Factor\",1.0],PARAMETER[\"Latitude_Of_Origin\",-15.96666666666667]],CS[Cartesian,2],AXIS[\"Easting (X)\",east,ORDER[1]],AXIS[\"Northing (Y)\",north,ORDER[2]],LENGTHUNIT[\"Meter\",1.0],ID[\"EPSG\",\"7882\"]]",
  "description": "St. Helena Tritan SHLG(Tritan)",
  "authority": "EPSG",
  "version": "9.0(10.6.0)",
  "deprecated": "no",
  "areaname": "St Helena - St Helena Island",
  "extent": {
    "slat": -16.08,
    "nlat": -15.85,
    "llon": -5.85,
    "rlon": -5.59
  }
}