1120 Cannonia 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...

. It was discovered by Pelageya Fedorovna Shajn

Pelageya Fedorovna Shajn

Pelageya Fedorovna Shajn née Sannikova was a Soviet/Russian astronomer. In modern English transliteration, her surname would be given as Shayn, but her astronomical discoveries are credited under the name P. F. Shajn...

 on September 11, 1928 at Simeis. Its provisional designation was 1928 RV. It was independently discovered by Grigory Nikolaevich Neujmin

Grigory Nikolaevich Neujmin

Grigory Nikolayevich Neujmin was a Soviet/Russian astronomer.He is credited with the discovery of 74 asteroids, and notably 951 Gaspra and 762 Pulcova. The Minor Planet Center credits his discoveries under the name G. N. Neujmin, and his surname appears this way in the literature...

 at Simeis two days later, and ten days later by 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...

 at Uccle

Uccle

Uccle or Ukkel is one of the nineteen municipalities located in the Brussels-Capital Region of Belgium.Uccle is known for its well-to-do areas, its green spots and its high rental rates.-History:...

. It was named for Annie Jump Cannon

Annie Jump Cannon

Annie Jump Cannon was an American astronomer whose cataloging work was instrumental in the development of contemporary stellar classification. With Edward C...

, who classified the spectral types of about 225,000 stars for the Henry Draper Catalog. The asteroid completes one rotation approximately once every 4 hours and makes one revolution around the Sun about once every 3 years.