List of asteroids/121501–121600

|| October 5, 1999 || Socorro || LINEAR
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121503 - || || October 1, 1999 || Catalina || CSS
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121506 - || || October 4, 1999 || Kitt Peak || Spacewatch
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121509 - || || October 9, 1999 || Socorro || LINEAR
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121512 - || || October 30, 1999 || Socorro || LINEAR
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121515 - || || October 31, 1999 || Gnosca || S. Sposetti
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121518 - || || October 30, 1999 || Kitt Peak || Spacewatch
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121521 - || || October 31, 1999 || Kitt Peak || Spacewatch
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121524 - || || October 31, 1999 || Kitt Peak || Spacewatch
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121527 - || || October 31, 1999 || Kitt Peak || Spacewatch
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121530 - || || October 16, 1999 || Socorro || LINEAR
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121533 - || || October 18, 1999 || Kitt Peak || Spacewatch
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121536 - || || October 31, 1999 || Catalina || CSS
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121539 - || || October 31, 1999 || Gnosca || S. Sposetti
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121542 - || || November 3, 1999 || Baton Rouge || W. R. Cooney Jr., P. M. Motl
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121545 - || || November 11, 1999 || Xinglong || BAO Schmidt CCD Asteroid Program
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121548 - || || November 3, 1999 || Socorro || LINEAR
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121551 - || || November 10, 1999 || Socorro || LINEAR
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121554 - || || November 4, 1999 || Kitt Peak || Spacewatch
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121557 - || || November 3, 1999 || Socorro || LINEAR
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121560 - || || November 3, 1999 || Socorro || LINEAR
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121563 - || || November 4, 1999 || Socorro || LINEAR
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121566 - || || November 4, 1999 || Socorro || LINEAR
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121569 - || || November 5, 1999 || Kitt Peak || Spacewatch
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121572 - || || November 5, 1999 || Socorro || LINEAR
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121575 - || || November 9, 1999 || Socorro || LINEAR
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121578 - || || November 9, 1999 || Socorro || LINEAR
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121581 - || || November 9, 1999 || Socorro || LINEAR
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121584 - || || November 9, 1999 || Socorro || LINEAR
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121587 - || || November 9, 1999 || Socorro || LINEAR
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121590 - || || November 9, 1999 || Socorro || LINEAR
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121593 - || || November 6, 1999 || Kitt Peak || Spacewatch
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121596 - || || November 9, 1999 || Kitt Peak || Spacewatch
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121599 - ||