1127 Mimi is a main belt asteroid orbiting the Sun

Sun

The Sun is the star at the center of the Solar System. It is almost perfectly spherical and consists of hot plasma interwoven with magnetic fields...

. Approximately 46 kilometers in diameter, it makes a revolution around the Sun once every 4 years. It completes one rotation once every 13 hours. It was discovered by Sylvain Julien Victor Arend

Sylvain Julien Victor Arend

Sylvain Julien Victor Arend was a Belgian astronomer born in Robelmont, Luxembourg . His main interest was astrometry.Together with Georges Roland, he discovered the bright comet C/1956 R1...

 on January 13, 1929. It was named for the wife of astronomer Eugène Joseph Delporte

Eugène Joseph Delporte

Eugène Joseph Delporte was a Belgian astronomer.-Discoveries:He discovered a total of sixty-six asteroids. Notable discoveries include 1221 Amor and the Apollo asteroid 2101 Adonis. He discovered or co-discovered some comets as well, including periodic comet 57P/du Toit-Neujmin-Delporte...

. Through an error, the names intended for 1127 Mimi and 1145 Robelmonte

1145 Robelmonte

1145 Robelmonte is a main belt asteroid orbiting the Sun. Approximately 23 kilometers in diameter, it makes a revolution around the Sun once every 4 years. It was discovered by Eugène Joseph Delporte on February 3, 1929. It was named after Robelmont, Belgium, the birthplace of astronomer Sylvain...

had been switched, and each name had been proposed by the discoverer of the other asteroid. Its provisional designation was 1929 AJ.