280001–280100
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|}
280101–280200
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| colspan=4 align=center |
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280201–280300
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| colspan=4 align=center |
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280301–280400
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| colspan=4 align=center |
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280401–280500
|-bgcolor=#f2f2f2
| colspan=4 align=center |
|}
280501–280600
|-bgcolor=#f2f2f2
| colspan=4 align=center |
|}
280601–280700
|-id=640
| 280640 Ruetsch || || Simon Ruetsch (born 1996), a member of the Jura Astronomy Society () in Switzerland || |-id=641 | 280641 Edosara || || Edoardo Rossi (born 1998) and Sara Breschi (born 1996), two amateur astronomers at the Pistoia Mountains Astronomical Observatory in Italy || |-id=642 | 280642 Doubs || || The Doubs, a 453-km-long river in eastern France and western Switzerland, tributary of the Saône. || |-id=652 | 280652 Aimaku || 2005 CQ || AIMAKU, the Italian association for people who suffer from alkaptonuria (genetic disease) || |}