October's supermoon pairs with a comet for a special night-time spectacle
· CNA · JoinCAPE CANAVERAL, Florida: October's supermoon is the closest of the year and it's teaming up with a comet for a rare stargazing two-for-one.
The third of four supermoons this year, it will be 357,364 kilometres away Wednesday night, making it seem even bigger and brighter than in August and September. It will reach its full lunar phase on Thursday (Oct 17).
In a twist of cosmic fate, a comet is in the neighbourhood. Discovered last year, comet Tsuchinshan-Atlas is now prominent in the Northern Hemisphere after wowing stargazers in the Southern Hemisphere.
The moonlight will wash out some of the comet’s tail, but it’s still worth a look after sunset, said NASA's Bill Cooke.
“Most astronomers hate the full moon because its bright light messes up observing other objects. So it’s a bit hard for us to wax poetic about it even if it’s the biggest supermoon of 2024,” he said in an email.
Better catch the comet; it may never return. But don't fret if you miss Thursday's supermoon. The fourth and final supermoon of the year will rise on Nov 15.
What makes a moon so super?
More a popular term than a scientific one, a supermoon occurs when a full lunar phase syncs up with an especially close swing around Earth. This usually happens only three or four times a year and consecutively, given the moon’s constantly shifting, oval-shaped orbit.
A supermoon obviously isn’t bigger, but it can appear that way, although scientists say the difference can be barely perceptible.
How do supermoons compare?
There’s a quartet of supermoons this year.
The one in August was 361,970 kilometres away. September's was nearly 4,484 kilometres closer the night of Sep 17 into the following morning. A partial lunar eclipse also unfolded that night, visible in much of the Americas, Africa and Europe as Earth’s shadow fell on the moon, resembling a small bite.
October's supermoon is the year’s closest at 357,364 kilometres from Earth, followed by the November supermoon at a distance of 361,867 kilometres.
What’s in it for me?
Scientists point out that only the keenest observers can discern the subtle differences. It’s easier to detect the change in brightness — a supermoon can be 30 per cent brighter than average.
With the US and other countries ramping up lunar exploration with landers and eventually astronauts, the moon beckons brighter than ever.
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