|| Palomar || E. F. Helin || ADE || align=right | 9.7 km || |-id=630 bgcolor=#E9E9E9 | 4630 Chaonis || 1987 WA || || November 18, 1987 || Chions || J. M. Baur || — || align=right | 7.5 km || |-id=631 bgcolor=#fefefe | 4631 Yabu || || || November 22, 1987 || Kushiro || S. Ueda, H. Kaneda || FLO || align=right | 5.5 km || |-id=632 bgcolor=#fefefe | 4632 Udagawa || 1987 YB || || December 17, 1987 || Chiyoda || T. Kojima || FLO || align=right | 4.6 km || |-id=633 bgcolor=#d6d6d6 | 4633 Marinbica || || || January 14, 1988 || La Silla || H. Debehogne || — || align=right | 13 km || |-id=634 bgcolor=#fefefe | 4634 Shibuya || 1988 BA || || January 16, 1988 || Kobuchizawa || M. Inoue, O. Muramatsu || — || align=right | 6.4 km || |-id=635 bgcolor=#fefefe | 4635 Rimbaud || || || January 21, 1988 || Haute-Provence || E. W. Elst || slow || align=right | 7.5 km || |-id=636 bgcolor=#E9E9E9 | 4636 Chile || || || February 13, 1988 || La Silla || E. W. Elst || EUN || align=right | 6.8 km || |-id=637 bgcolor=#fefefe | 4637 Odorico || 1989 CT || || February 8, 1989 || Chions || J. M. Baur || NYS || align=right | 6.3 km || |-id=638 bgcolor=#fefefe | 4638 Estens || 1989 EG || || March 2, 1989 || Siding Spring || R. H. McNaught || — || align=right | 4.6 km || |-id=639 bgcolor=#E9E9E9 | 4639 Minox || || || March 5, 1989 || Geisei || T. Seki || RAF || align=right | 6.9 km || |-id=640 bgcolor=#fefefe | 4640 Hara || 1989 GA || || April 1, 1989 || Yatsugatake || Y. Kushida, O. Muramatsu || — || align=right | 6.1 km || |-id=641 bgcolor=#fefefe | 4641 Ayako || || || August 30, 1990 || Kitami || K. Endate, K. Watanabe || — || align=right | 3.5 km || |-id=642 bgcolor=#d6d6d6 | 4642 Murchie || || || August 23, 1990 || Palomar || H. E. Holt || THM || align=right | 17 km || |-id=643 bgcolor=#fefefe | 4643 Cisneros || || || August 23, 1990 || Palomar || H. E. Holt || EUT || align=right | 5.7 km || |-id=644 bgcolor=#E9E9E9 | 4644 Oumu || || || September 16, 1990 || Kitami || A. Takahashi, K. Watanabe || EUN