One is the loneliest number, especially when you are a
single moon circling the planet full of humans. But let’s not lose hope here
because NASA just announced that there might be a second moon come to keep you
company. This newly discovered moon is smaller than our moon and
goes around the Earth astonishingly irregularly, but still, two is quite better
than one. This second “moon,” is actually an asteroid called 2016 HO3 and it is
currently locked into “a little dance” with Earth. It's being called as
"Quasi-Moon".
This new moon has
been dancing around for over a century now. Its orbit is extremely elliptical,
affecting it to go a wee bit off tangent—between 38 and 100 times the distance
of Earth’s primary moon—and bob up and down across Earth’s orbital plane. This
new moon is tilted by about 8° and it orbits the Sun for 365.93 days, which is
a little longer than Earth’s 365.24 day-long year.
NASA
said:
“Since
2016 HO3 loops around our planet, but never ventures very far away as we both
go around the sun, we refer to it as a quasi-satellite of Earth”
Since
it’s tilted and has an elliptical orbit, sometimes it is
quite
closer to the Sun and moving a little faster than Earth. Other times, it is a
little bit farther out and moving a bit more slowly, however it never gets any
closer than about 14 million kilometers from Planet Earth or farther than about
40 million kilometers.
According
to NASA, it’s larger than 36.5 meters across, but no more than 91 meters wide,
and will circle earth for many more centuries to come.
2016
HO3 was first discovered by astronomers in April 27 with the Pan-STARRS 1
asteroid survey telescope located in Haleakala, Hawaii.
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