Frederic Sy was a French astronomer who published scientific articles from 1894 to 1918 about comets and asteroids. He worked at the astronomical observatory the Research center in Astronomy, Astrophysique and Geophysics (CRAAG, formerly the Observatory of Algiers) and was a colleague of François Gonnessiat. He discovered two asteroids, which he named:
The first quarter is red, the heraldic color of Africa with a tower to represent a fort located in the city. The second quarter is green, the color of Islam, of sinople with a kouba to point out the koubbas of Sidi-Nouman inter alia. With the third district, sinople cypresses to point out the wooded solid mass which covered formerly all the "Bouzaréah". With the fourth district the crescent of Islam with the stars which refer to the Observatory of the Celestial Village on blue of France.
This coat of arms was made by Théo Bruand d' Uzelle in 1993.