The preliminary period of 1998 UP1 was originally thought to be slightly longer than 1 year producing an error in the predicted position of about 35 degrees; it was selected as a priority for recovery and recovered by the Camarillo Observatory on 12 October 1999.
起初認為1998 UP1 的週期比一年稍長一點，造成以錯誤的35度傾角去預測位置；他被選擇為優先在發現的目標，並且在1999年10月12日被卡馬里奧天文臺再發現。