Eager stargazers are preparing for an early morning on Tuesday in order to view the latest lunar phenomenon.

The partial lunar eclipse, which occurs when the earth moves between the sun and the moon will commence at 3:22am and last around 2 hours.

Glen Nagle from the CSIRO Astronomy and Space Science division said that a portion of the moon will initially take on a dark red tinge before fading to almost complete darkness.

"You'll see an initial partial reddening of the moon. From Sydney's point of view, if you're looking at the moon you'll be looking at the top left hand corner of the moon and it will have a slightly reddish brown appearance. That is the light passing through the earth's atmosphere on its way to the moon and is known as the penumbral phase of the eclipse."