(27709) Orenburg

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( 27709 ) Orenburg is an asteroid of the outer main belt, which was discovered on 13 February 1988 by the Belgian astronomer Eric Walter Elst at the La Silla Observatory of the European Southern Observatory in Chile ( IAU code 809).

The asteroid is part of the Eos family, a group of asteroids, which typically have semi-major axes from 2.95 to 3.1 AE, bounded on the inside of the Kirkwood gap in the 7:3 resonance with Jupiter, and orbital inclinations between 8 ° and 12 degrees. The group is named after the asteroid (221 ​​) Eos. It is believed that the family was created over one billion years ago by a collision. The timeless ( nichtoskulierenden ) orbital elements of ( 27709 ) Orenburg are almost identical to those of the two smaller, if we start from the absolute brightness of 15.6 and 16.1 compared to 12.9, asteroid ( 230655 ) 2003 SM101 and ( 360 932 ) 2005 TJ133.

( 27709 ) Orenburg was named after the Russian city of Orenburg on 1 June 2007.