The details provided by NASA's Jet Propulsion Laboratory confirms that on 8 December 2019 an asteroid shot passed the earth.
(The Center for Near-Earth Object Studies website:- Under 'NEO Earth Close Approaches', Select data table -Table Settings: Recent past (within 60 days), Select the Row of 8 December 2019 (2019- VH5))
The Solar System Dynamics (SSD) on NASA's Jet Propulsion Laboratory website, the orbital diagram of 2019 VH5 shows that the asteroid had shot passed by the earth on 8 December 2019 which also determines the accurate long-term trajectories.
(On the Orbital Diagram:- click on step backwards and stop at the date 2019-12-08 00:00 UTC)
However, the asteroid was in a pyramid-shape is just a word used by the news networks.
CORRECTION: The previous version of the FactCheck stated that the claim was unverifiable because of insufficient evidence. This was incorrect. In fact, on verifying it again we found it was verifiable, and the evidence is available on the official website of National Aeronautics and Space Administration (NASA) which confirms that an asteroid called '2019 VH5' had passed by the earth on 8 December 2019.