[andyzei]

Did anyone else notice the object flying by @ 54:26? What was that? Looked bigger than a piece of dust, was moving much faster than the upper stage and payload. Is that normal? Did it pose any risk?

https://youtu.be/TXMGu2d8c8g?t=3265

[chiefofgxbxl]

Interesting find! Earlier in the feed you can see a solid piece of oxygen [0] bouncing off the engine. The particle you mentioned is going past the spacecraft (forward), so I can't see it being solid oxygen. My guess is a piece of dust that is being illuminated, and the camera is picking up the reflection but is blurry, making the particle look bigger than it actually is.

[0] https://youtu.be/TXMGu2d8c8g?t=2729

[lutorm]

It happens right as the spacecraft is recoiling from the separation impulse, so I'd guess it's something coming off from the top of the stage and passing by the camera.

[x2f10]

Whoa - thank you for pointing out the solid oxygen. That is mind-blowing to me! Super cool!

[reportingsjr]

They explained at another point in today's stream that the pieces you see flying around are solid oxygen from a drain on the second stage. Totally normal and you see it on every one of their launch streams!

[dylan-m]

A couple inches to the left and that dialog would have been comedy gold :b (Although more seriously, I'll speculate that it looks larger than it is because it's reflecting a lot of light).

[weaksauce]

right after main booster of the second stage ignited a part of the ring came off. there is stuff that comes off every launch I've seen.

[duskwuff]

That's a stiffening ring. It helps the nozzle to the second stage engine keep its shape while the first stage is firing.

https://space.stackexchange.com/questions/20700