A full moon on Friday the 13th is spooky sufficient, however maintain on to your black cats. September’s full moon can even be a “micromoon.”
Skywatchers in Central, Mountain and Pacific time zones will get a view of the total moon tonight (Sept. 13) at 11:32 p.m., 10:32 p.m. and 9:32 p.m., respectively, whereas East Coasters will see the moon at its fullest at 12:32 a.m. on the 14th. No matter time zone, the moon will seem only a bit dimmer than normal (eerie!), as a result of will probably be at apogee, or its farthest distance from Earth.
That implies that the moon will seem about 14% smaller and 30% dimmer than when it’s at its closest level to Earth, which is called perigee.
The moon’s orbit round Earth is elliptical. Every month, as this pure satellite tv for pc orbits the planet, it passes by one apogee and one perigee. Moons at perigee are referred to as “supermoons.” The closest perigee of 2019 occurred on Feb. 19, when the moon traveled inside 221,681 miles (356,761 kilometers) of Earth.
The farthest apogee of the 12 months was additionally in February, on the fifth, when the moon was 252,622 miles (406,555 km) away. This month’s apogee places the moon 252,511 miles (406,377 km) away.
Realistically, the distinction between a supermoon and a micromoon is tough to identify. “[It’s] not sufficient to note until you are a really cautious moon-watcher,” Sky & Telescope journal senior editor Alan MacRobert stated in a 2016 assertion. Certainly, the time period “supermoon” appeared within the lexicon solely in 1979, in response to that assertion, and it wasn’t till a spate of three supermoons in 2016 that the time period turned fashionable.
Although a dimmer-than-usual full moon might make Friday the 13th really feel a bit creepier, do not anticipate werewolves and mayhem. Full moons have occurred on Friday the 13ths earlier than to no unwell impact, and plenty of analysis finds that people will not be affected by the moon’s cycles. Opposite to fashionable fantasy, you are no more probably to enter labor, have seizures or go mad within the face of a full moon.
It is attainable, although, that this month’s superstitiously timed moon might act as a public relations increase for the micromoon. Maybe, as a result of larger is healthier, micro- or minimoons have not gotten the identical consideration as supermoons. Google minimoon, and you will find extra outcomes about taking a neighborhood honeymoon than you’ll about any astronomical phenomenon (although Stay Science’s sister web site Area.com has used the time period). The time period micromoon has been in play since no less than 2016, as on this NASA side-by-side comparability of the moon at perigee and apogee. However whereas “supermoon” will internet you greater than 9.three million Google outcomes, micromoon clocks in at lower than 1,000,000.
Will this month’s freaky Friday the 13th full moon change that? Keep tuned. The following full micromoon is not till Oct. 1, 2020.
Initially printed on Stay Science.