This report summarizes new meteorite approvals and revisions from January 21, 2023 to April 30, 2023 from the Meteoritical Society’s Nomenclature Committee. Joe Gianninoto and Dolores Hill communicated about artifacts observed in meteorite thin sections. In addition, Gianninoto is preparing to assist meteoriticist Derek Sears with a microscope project involving point-counting on a thin section. 

As of April 30, 2023, the Meteoritical Bulletin recognizes a total of 79,233 officially named meteorites. Among the 739 newly approved or updated meteorites is the Koshigaya L4 chondrite, an old 1902 fall from Japan. Four meteorite entries are "discredited” as duplicates of previously recognized meteorites. 

NWA 15468 is a noteworthy OC4- melt breccia. The general Ordinary Chondrite "OC" classification results from its intrinsic differences from established groups. It exhibits heterogeneous metal distribution along with a wide range of Mg-rich silicate compositions and oxygen isotopes that do not fall on existing H-L-LL chondrite trends. 

Newly approved meteorites include 566 ordinary chondrites (277 H, 229 L, 58 LL, 1 L/LL, 1 OC4), 9 achondrites-ungrouped; 58 carbonaceous chondrites (1 CB, 13 CK, 7 CM2, 14 CO3, 13 CV3; 3 CR; 7 R); 6 EL chondrites; 1 lodranite; 9 mesosiderites; 10 irons (5 IAB, 2 IIAB, 1 IVA, 2 iron ungrouped); 3 pallasites; 28 HEDs (7 Howardites, 14 Eucrites, 7 Diogenites); 9 ureilites; 1 Winonaite; 32 Lunar; 3 Martian. 

More information and official details on particular meteorites can be found at: https:/www.lpi.usra.edu/meteor/metbull.php