| 1.2 km || |-id=283 bgcolor=#E9E9E9 | 178283 || 4261 T-3 || — || October 16, 1977 || Palomar || PLS || — || align=right | 1.6 km || |-id=284 bgcolor=#d6d6d6 | 178284 || || — || November 29, 1978 || Palomar || S. J. Bus, C. T. Kowal || — || align=right | 6.2 km || |-id=285 bgcolor=#E9E9E9 | 178285 || || — || March 1, 1981 || Siding Spring || S. J. Bus || — || align=right | 3.6 km || |-id=286 bgcolor=#E9E9E9 | 178286 || || — || March 2, 1981 || Siding Spring || S. J. Bus || — || align=right | 2.7 km || |-id=287 bgcolor=#FA8072 | 178287 || || — || October 24, 1981 || Palomar || S. J. Bus || — || align=right | 1.5 km || |-id=288 bgcolor=#E9E9E9 | 178288 || || — || August 30, 1983 || Palomar || J. Gibson || — || align=right | 2.0 km || |-id=289 bgcolor=#fefefe | 178289 || || — || October 7, 1989 || La Silla || E. W. Elst || NYS || align=right | 1.0 km || |-id=290 bgcolor=#E9E9E9 | 178290 || || — || October 7, 1989 || La Silla || E. W. Elst || — || align=right | 1.7 km || |-id=291 bgcolor=#C2FFFF | 178291 || || — || October 29, 1989 || Cerro Tololo || S. J. Bus || L5 || align=right | 15 km || |-id=292 bgcolor=#d6d6d6 | 178292 || || — || August 17, 1990 || Palomar || A. Lowe || — || align=right | 4.6 km || |-id=293 bgcolor=#FA8072 | 178293 || 1990 SN || — || September 17, 1990 || Kitt Peak || Spacewatch || — || align=right | 1.1 km || |-id=294 bgcolor=#fefefe | 178294 Wertheimer || || || October 11, 1990 || Tautenburg Observatory || F. Börngen, L. D. Schmadel || — || align=right | 1.3 km || |-id=295 bgcolor=#d6d6d6 | 178295 || || — || February 29, 1992 || La Silla || UESAC || SHU3:2 || align=right | 11 km || |-id=296 bgcolor=#E9E9E9 | 178296 || || — || September 26, 1992 || Kitt Peak || Spacewatch || — || align=right | 4.4 km || |-id=297 bgcolor=#fefefe | 178297 || || — || March 19, 1993 || La Silla || UESAC || — || align=right | 1.3 km || |-id=298 bgcolor=#fefefe | 178298 || || — || March 17, 1993 || La Silla