Goldstone Radar posted Delay-Doppler images of (7753) 1988 obtained on November 18-22, 2020 which shows an elongated object with distinct surface features rotating slowly with time. JPL Orbital parameters show that 7 doppler radar observations were used to update the orbit. JPL solution date: 2020-Nov-24 05:23:52
(7753) 1988 was previously observed studied by Arecibo Observatory Planetary Radar in November 2004.
(7753) 1988 passed close to Earth on 2020-Nov-22 16:55 UT at 25.76 Lunar Distances (LD) or 0.06619 au.
(7753) 1988 is a Potentially Hazardous Asteroid (PHA) or Near Earth Asteroid (NEA) whose Minimum Orbit Intersection Distance (MOID) with the Earth is 0.05 AU or less and whose absolute magnitude (H) is 22.0 or brighter. MOID <= 0.05 au, H <= 22.0
Goldstone Asteroid Schedule: https://echo.jpl.nasa.gov/asteroids/goldstone_asteroid_schedule.html
MPC database: https://minorplanetcenter.net/db_search/show_object?utf8=%E2%9C%93&object_id=7753
JPL Small Body database: https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=7753
Asteroid Radar Research: https://echo.jpl.nasa.gov/
Slade, Martin A.; Benner,Lance A. M.; Silva, Arnold; Goldstone Solar System Radar Observatory: Earth-Based Planetary Mission Support and Unique Science Results, Proceedings of the IEEE. 99 (5): 757–769. doi:10.1109/jproc.2010.2081650.