Named in honor of John DeLaeter, retired professor at Curtin University, Western Australia, in recognition of his pioneering application of mass spectrometry to a range of astrophysical, chemical, geological and nuclear problems over many decades. His outstanding scientific achievements and communication skills have been recognized in awards from ANZAAS, the Royal Society and the Australian Geological Society. He is an officer of the Order of Australia. His support of the Perth Observatory during funding crises was instrumental in maintaining the operation of this isolated institution. Name suggested and citation provided by J. Biggs and P. Birch.