Home›Asteroids›639671 2017 HS21639671 2017 HS21Main-belt minor planetDesignation(639671) 2017 HS21ClassMain-beltSemi-major axis3.140687 AUEccentricity0.1280852Inclination5.61978°Absolute magnitude (H)16.71Perihelion2.738 AUAphelion3.543 AU