The annual Geminid meteor shower is expected to peak on December 13-14, but the nearly full Moon will obstruct its view. The official peak is forecast for around 8 p.m. EST on December 13th. Under moonless conditions, up to 150 meteors per hour might be visible from a rural sky.
However, the 98%-illuminated waxing gibbous Moon will stick around till dawn and scrub out many Geminids. To counter this, meteor watchers can spend more time observing the shower or wait for the Moon to set earlier in the evening. The optimal viewing time is between 9-11 p.m. local time, when the meteor streaming point climbs from about 25° to 50° altitude.
To make the most of the Geminid shower, observers should dress warmly and face a direction that allows them to see meteors both close to and far from the radiant. This can be achieved by facing about 90° away from the radiant, either north or south. A hot beverage and a comfortable chair will also help pass the time while watching the meteor shower.
The Geminid meteor shower is caused by the debris of the asteroid 3200 Phaethon, which originates from a partial disruption of the asteroid through rapid rotation or another cause sometime in the last few thousand years. The Japanese DESTINY+ mission is scheduled to launch in 2028 and will fly by Phaethon in 2030, providing more insights into the Geminid meteor shower’s origin and evolution.
Despite the challenges posed by the full Moon, the Geminid meteor shower remains a popular and relaxing activity for amateur astronomers.
Source: https://skyandtelescope.org/astronomy-news/dont-let-the-bright-moon-ruin-your-geminids