12633

12633 is a numbered minor planet located in the central region of the asteroid belt. It was discovered on 15 April 1997 by astronomer K. Kataoka at the Kuki Observatory in Japan. The provisional designation of the asteroid was 1997 FY. After its orbit was sufficiently well determined, it was assigned the permanent number 12633 by the Minor Planet Center.

The asteroid was named in honor of the Japanese amateur astronomer Satoshi Kōno (1933–2002), who is remembered for his extensive observations of variable stars and for his contributions to public outreach in astronomy. The naming citation was published in the Minor Planet Circulars in 1999.

Asteroid 12633 is classified as a stony S-type object based on its spectral reflectance. It has an estimated diameter of approximately 7.8 kilometres, derived from an absolute magnitude of 12.6 and an assumed geometric albedo of 0.15. Its orbit around the Sun has a semi‑major axis of 2.62 AU, an eccentricity of 0.14, and an inclination of 3.9° relative to the ecliptic. The orbital period is about 4.20 years.

Photometric light‑curve observations carried out in 2005 and 2006 indicate a rotation period of 4.63 hours with a brightness amplitude of 0.13 magnitudes, suggesting a relatively spheroidal shape. No companion bodies or significant non‑gravitational forces have been detected in current surveys.