The NEOCP object, C172771, that we observed last night has now been designated 2020 JT1. It is an Apollo-type asteroid with a diameter of 41-93 metres.
2020 JT1 was first observed at Catalina Sky Survey on May 14th. It made a close approach today, at a distance of 0.0253 au (3.8 million km) from Earth.
We observed it when it was visible at +18 mag, moving at 53″/min through the constellation of Coma Berenices.