By themselves, a lunar eclipse, a supermoon and a blue moon aren’t that uncommon. But it’s rare for all three to happen at the same time as they did the morning of Jan. 31.
Lunar eclipses happen, on average, about every six months somewhere on Earth according to Sally Kilburg, South Okanagan vice-president for the Okanagan chapter of the Royal Astronomical Society of Canada.
A blue moon, the second full moon in a month, isn’t quite as common, but is still a regular occurrence, as is a supermoon, marking the point when the moon is closest to Earth in its elliptical orbit.
Having all three happening together is anything but regular.
“I don’t know of another instance. I would have to go digging through astronomical information to see if there is anything else out there,” said Ken Tapping, an astronomer with the Dominion Radio Astrophysical Observatory near Penticton.