Dictionary of Nomenclature of Celestial Objects

The E components is itself composed of a central source 'Ec' and a disk-like structure 'Ed'.
in source:IRAS 04368+2557
Ref:=2002ApJ...581L.109L
byLOINARD L. , RODRIGUEZ L.F., D'ALESSIO P., WILNER D.J., HO P.T.P.
 Astrophys. J., 581, 109-113 (2002)
  Orbital proper motions in the protobinary system L1527/IRAS 04368+2557.
oFig.1: <[LRD2002] IRAS 04368+2557 Aa> (Nos E, C, Ec, Ed).

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