Dear Rich, and all I find the 3.3 magnitude difference very strange for INTERBOL 2 R ( 96050F , cat N 24296 ). Here the latest set from OIG : 1 24296U 96050 F 97007.11044262 -.00000212 00000-0 -25803-2 0 624 2 24296 62.7955 320.7917 5616785 290.8560 19.4082 4.15037741 5434 Can You observe it again ? Thanks Daniel Karcher , 101672,3140@compuserve.com