There's an estimated 10% chance that two large pieces of orbiting space debris could collide tomorrow night at an altitude of 615 miles and a relative velocity of 32,883 mph.
With a combined mass of over three tons, these two orbiting objects will miss each other by about 40 feet.😬

Let's hope we don't add Kessler syndrome to the list of 2020 fun
These two objects are a Russian nav/com sat and a Chinese rocket stage, according to @planet4589
The nav satellite has a 50-foot-long boom extending from it too, just to add an extra element of excitement.
This speed, by the way, is nearly 12 times faster than high-velocity rifle bullets. Except these bullets are well over a ton each.
The most recent model is showing a miss distance of about 82 feet between these two objects, but there's still a margin of error there
Update: no sign of any impact or debris.
Now it’s coming to light that estimates from other bureaus had a *much* wider miss margin between these two orbital objects, up to nearly 600 meters. Still close but certainly not as dramatic. 🤨

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More from @JPMajor

20 Apr 19
Cool 3D rendering of the Milky Way galaxy by @StefanPWinc showing the curve of the galactic plane and dust using data from GAIA (ht @runnymonkey)
The galaxy our Sun and solar system resides within is a barred spiral galaxy about 105,700 light-years across. Its plane is not a perfectly flat disk though; astronomers have found that it has a warped shape. earthsky.org/space/milky-wa…
From Earth the Milky Way is a hazy band of stars with dark clouds of dust stretching across the sky, best visible from dark locations. We can't see the spiral shape because we're inside one of the arms, looking into the plane of it.
Read 5 tweets
31 May 18
This image shows the limb of Saturn's moon Iapetus, captured by #Cassini on Sept. 10, 2007. A ridge of 10km-high (6.2 mile) mountains encircles the equator, possibly the remains of a former satellite that broke apart as its orbit degraded. Iapetus is 1,470 km (913 miles) wide.
Here's a wide-angle view of Iapetus from the same observation set on 9/10/07. Color comp made from images acquired in IR, G, and UV.
Iapetus is an icy moon stained dark. This "telephoto" view of the eastern limb region from the previous image shows where dark material has coated its leading forward-facing side. This dark material originates from even more distant moon Phoebe, which is likely a captured comet.
Read 12 tweets

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