OMM_FIELDS: readonly [
"OBJECT_NAME",
"OBJECT_ID",
"EPOCH",
"MEAN_MOTION",
"ECCENTRICITY",
"INCLINATION",
"RA_OF_ASC_NODE",
"ARG_OF_PERICENTER",
"MEAN_ANOMALY",
"EPHEMERIS_TYPE",
"CLASSIFICATION_TYPE",
"NORAD_CAT_ID",
"ELEMENT_SET_NO",
"REV_AT_EPOCH",
"BSTAR",
"MEAN_MOTION_DOT",
"MEAN_MOTION_DDOT",
] = ...
The OMM fields the engine keeps, in the standard's order: the one list a caller can mirror in its own schema.
Ommhas exactly these keys; the compiler holds the two together inreadElements.