Home›Asteroids›137317 1999 TY21137317 1999 TY21Main-belt minor planetDesignation(137317) 1999 TY21ClassMain-beltSemi-major axis2.3437422 AUEccentricity0.1342501Inclination4.94119°Absolute magnitude (H)16.69Perihelion2.029 AUAphelion2.658 AU