April 1, 1987 || Palomar || E. F. Helin || — || align=right | 9.8 km || |-id=277 bgcolor=#fefefe | 5277 Brisbane || 1988 DO || || February 22, 1988 || Siding Spring || R. H. McNaught || — || align=right | 3.0 km || |-id=278 bgcolor=#fefefe | 5278 Polly || || || March 12, 1988 || Palomar || E. F. Helin || FLO || align=right | 4.4 km || |-id=279 bgcolor=#fefefe | 5279 Arthuradel || 1988 LA || || June 8, 1988 || Palomar || T. Rodriquez || — || align=right | 7.6 km || |-id=280 bgcolor=#E9E9E9 | 5280 Andrewbecker || 1988 PT || || August 11, 1988 || Palomar || C. Mikolajczak, R. Coker || — || align=right | 11 km || |-id=281 bgcolor=#d6d6d6 | 5281 Lindstrom || || || September 6, 1988 || Cerro Tololo || S. J. Bus || EOS || align=right | 17 km || |-id=282 bgcolor=#E9E9E9 | 5282 Yamatotakeru || 1988 VT || || November 2, 1988 || Gekko || Y. Oshima || — || align=right | 5.9 km || |-id=283 bgcolor=#C2FFFF | 5283 Pyrrhus || 1989 BW || || January 31, 1989 || Palomar || C. S. Shoemaker || L4 || align=right | 48 km || |-id=284 bgcolor=#C2FFFF | 5284 Orsilocus || || || February 1, 1989 || Palomar || C. S. Shoemaker, E. M. Shoemaker || L4 || align=right | 50 km || |-id=285 bgcolor=#C2FFFF | 5285 Krethon || || || March 9, 1989 || Palomar || C. S. Shoemaker, E. M. Shoemaker || L4 || align=right | 50 km || |-id=286 bgcolor=#d6d6d6 | 5286 Haruomukai || || || November 4, 1989 || Kagoshima || M. Mukai, M. Takeishi || — || align=right | 9.1 km || |-id=287 bgcolor=#E9E9E9 | 5287 Heishu || 1989 WE || || November 20, 1989 || Kani || Y. Mizuno, T. Furuta || — || align=right | 8.3 km || |-id=288 bgcolor=#E9E9E9 | 5288 Nankichi || 1989 XD || || December 3, 1989 || Kani || Y. Mizuno, T. Furuta || EUN || align=right | 8.7 km || |-id=289 bgcolor=#d6d6d6 | 5289 Niemela || || || May 28, 1990 || El Leoncito || Félix Aguilar Obs. || EOS || align=right | 9.9 km || |-id=290 bgcolor=#E9E9E9 | 5290 Langevin || || || July 30, 1990 || Palomar || H. E. Holt || — || align=right | 18 km || |-id=291 bgcolor=#fefefe | 5291 Yuuko || 1990 YT