align=right | 3.9 km || |-id=488 bgcolor=#E9E9E9 | 49488 || || — || January 18, 1999 || Socorro || LINEAR || ADE || align=right | 7.7 km || |-id=489 bgcolor=#E9E9E9 | 49489 || || — || January 18, 1999 || Socorro || LINEAR || — || align=right | 3.9 km || |-id=490 bgcolor=#E9E9E9 | 49490 || || — || January 18, 1999 || Socorro || LINEAR || — || align=right | 8.3 km || |-id=491 bgcolor=#E9E9E9 | 49491 || || — || January 18, 1999 || Socorro || LINEAR || — || align=right | 11 km || |-id=492 bgcolor=#d6d6d6 | 49492 || || — || January 19, 1999 || Višnjan Observatory || K. Korlević || HYG || align=right | 6.2 km || |-id=493 bgcolor=#fefefe | 49493 || 1999 CD || — || February 4, 1999 || Oizumi || T. Kobayashi || FLO || align=right | 2.7 km || |-id=494 bgcolor=#E9E9E9 | 49494 || || — || February 6, 1999 || Oizumi || T. Kobayashi || GEF || align=right | 3.8 km || |-id=495 bgcolor=#E9E9E9 | 49495 || || — || February 7, 1999 || Oizumi || T. Kobayashi || — || align=right | 6.8 km || |-id=496 bgcolor=#E9E9E9 | 49496 || || — || February 8, 1999 || Oizumi || T. Kobayashi || AGN || align=right | 4.9 km || |-id=497 bgcolor=#d6d6d6 | 49497 || || — || February 8, 1999 || Uto || F. Uto || — || align=right | 9.5 km || |-id=498 bgcolor=#E9E9E9 | 49498 || || — || February 12, 1999 || Gekko || T. Kagawa || — || align=right | 6.7 km || |-id=499 bgcolor=#d6d6d6 | 49499 || || — || February 13, 1999 || Oizumi || T. Kobayashi || — || align=right | 6.3 km || |-id=500 bgcolor=#d6d6d6 | 49500 Ishitoshi || || || February 14, 1999 || Oizumi || T. Kobayashi || — || align=right | 8.0 km || |} 49501–49600 |-bgcolor=#d6d6d6 | 49501 Basso || || || February 13, 1999 || Ceccano || G. Masi || THM || align=right | 7.6 km || |-id=502 bgcolor=#d6d6d6 | 49502 || || — || February 15, 1999 || Višnjan Observatory || K. Korlević || EOS || align=right | 7.1 km || |-id=503 bgcolor=#d6d6d6 | 49503 || || — || February 10, 1999 || Socorro || LINEAR || EOS || align=right | 7.2 km || |-id=504 bgcolor=#E9E9E9 | 49504 || || — || February 10, 1999