4.0 km || |-id=220 bgcolor=#E9E9E9 | 28220 York || || || December 28, 1998 || Kleť || J. Tichá, M. Tichý || — || align=right | 2.5 km || |-id=221 bgcolor=#d6d6d6 | 28221 || || — || December 22, 1998 || Kitt Peak || Spacewatch || KOR || align=right | 4.5 km || |-id=222 bgcolor=#fefefe | 28222 Neilpathak || || || December 16, 1998 || Socorro || LINEAR || FLO || align=right | 3.5 km || |-id=223 bgcolor=#E9E9E9 | 28223 || || — || December 27, 1998 || Nyukasa || M. Hirasawa, S. Suzuki || — || align=right | 6.4 km || |-id=224 bgcolor=#fefefe | 28224 || 1999 AJ || — || January 5, 1999 || Višnjan Observatory || K. Korlević || NYS || align=right | 2.2 km || |-id=225 bgcolor=#E9E9E9 | 28225 || 1999 AS || — || January 7, 1999 || Oizumi || T. Kobayashi || — || align=right | 4.1 km || |-id=226 bgcolor=#E9E9E9 | 28226 || || — || January 9, 1999 || Oizumi || T. Kobayashi || HNA || align=right | 4.7 km || |-id=227 bgcolor=#fefefe | 28227 || || — || January 9, 1999 || Oizumi || T. Kobayashi || FLO || align=right | 3.6 km || |-id=228 bgcolor=#E9E9E9 | 28228 || || — || January 9, 1999 || Oizumi || T. Kobayashi || — || align=right | 5.7 km || |-id=229 bgcolor=#fefefe | 28229 || || — || January 9, 1999 || Višnjan Observatory || K. Korlević || V || align=right | 2.5 km || |-id=230 bgcolor=#fefefe | 28230 || || — || January 10, 1999 || Nachi-Katsuura || Y. Shimizu, T. Urata || — || align=right | 7.1 km || |-id=231 bgcolor=#E9E9E9 | 28231 || || — || January 10, 1999 || Nachi-Katsuura || Y. Shimizu, T. Urata || HNS || align=right | 4.3 km || |-id=232 bgcolor=#E9E9E9 | 28232 || || — || January 12, 1999 || Oizumi || T. Kobayashi || — || align=right | 4.6 km || |-id=233 bgcolor=#E9E9E9 | 28233 || || — || January 12, 1999 || Oizumi || T. Kobayashi || — || align=right | 4.9 km || |-id=234 bgcolor=#d6d6d6 | 28234 || || — || January 13, 1999 || Oizumi || T. Kobayashi || — || align=right | 11 km || |-id=235 bgcolor=#fefefe | 28235 Kasparvonbraun || || || January 7, 1999 || Anderson Mesa || LONEOS || — || align=right | 2.8 km ||