How Kiwis can try to view the once-in-a-lifetime green comet

Comet C/2022 E3 (ZTF).
Comet C/2022 E3 (ZTF). Photo credit: Getty Images

A once-in-a-lifetime green comet will be passing through southern hemisphere skies - but it may be difficult for Kiwis to spot in our night sky.

Comet C/2022 E3 (ZTF) last passed Earth in the Stone Age 50,000 years ago. The comet may never reach Earth again.

The comet was discovered in March 2022 by Zwicky Transient Facility in California. It has been visible in the northern hemisphere since January. 

The comet will be at its brightest from February 1 and 2, although it will not be visible in our horizons as this is when it's closest to the northern star.

Robert Davison, an astronomer from Stardome Observatory, said the comet will be first visible in our sky after sunset on February 5. 

However, with the comet being low to the horizon and a nearly full moon in the sky, people may find it difficult to spot the comet, even with equipment, said Davidson.

Davidson said that Kiwis may have more luck spotting the comet on February 11 at around 10pm before the moon rises. 

Though the comet will be further away from Earth, it will be closer to Mars and higher in the sky. This should make it easier for Kiwis to locate the comet in our skies. 

Davidson recommends that Kiwis use some form of equipment to watch the comet. 

"This doesn't mean you'll necessarily need a telescope though. A simple pair of binoculars may well be enough to help you spot it, particularly if you have something to help keep them steady."

Another key tip Davidson gave was to avoid any extra light, both natural and human-produced light pollution.

Davidson noted that even with equipment, the comet will appear like a greenish smudge to the human eye.