The Artemis Rocket

[B-Tender]

In January, my son starts work on the Vulcan Centaur rocket program. I have no idea what he will be specifically doing. This will be his first job with the U.S. Space Force.

[Animal]

Artemis (Orion) just passed the closest to the moon (I think about 80 miles off of the surface). There are some pretty good images that NASA recorded live as it was happening.



Go to 4:32:08 (at least that's the time stamp when I looked) to see the live pictures.

really close is around 2:58:00

[woohooguy]

In January, my son starts work on the Vulcan Centaur rocket program. I have no idea what he will be specifically doing. This will be his first job with the U.S. Space Force.

You must be very proud!!

That's an amazing accomplishment!!

[B-Tender]

In January, my son starts work on the Vulcan Centaur rocket program. I have no idea what he will be specifically doing. This will be his first job with the U.S. Space Force.

You must be very proud!!

That's an amazing accomplishment!!

Thank you.

[Animal]

What would it look like if you could find a spot where you could watch the Moon actually eclipse the Earth?

[CentralTexasCrude]

What would it look like if you could find a spot where you could watch the Moon actually eclipse the Earth?

That is cool as hell

[woohooguy]

The pictures of the "dark side" of the moon have been amazing.

[Animal]

Orion is currently closing in on the moon to use its gravity to slingshot it back toward the earth for a splash down. Its still several days away from splash down, though.

[Animal]

damn, its getting really close to the moon right now. 1300 miles. Traveling 4700 mph right now.

[pork]

So I was just looking at a graphic of the upcoming liftoff to the moon. And they had a long list of trivia facts about the rocket. One of them was the number of days it will take to get to the moon, 8 to 14. Why is that a range? Why wouldn't that be an exact number?

Artemis 1 will be gone for between 26 and 42 days. It'll take one to two weeks to get to the moon, where Orion will swoop down close to the lunar surface and use the gravitational kick it receives to enter a so-called "distant retrograde orbit."

Retrograde means that it will orbit the moon in the opposite direction to the one in which the moon spins. Orion will stay in that orbit for between six and 19 days. Then it will swing back down toward the moon for another kick to help power its nine- to 19-day journey back to Earth.

i have avoided this thread until now. the answer is a lot less technical than the previous charts etc. its simply who is driving and what their country of origin is.

[Animal]

i'm not sure how this return flight to earth works, but it has slung around the moon and Orion is now headed back to earth.

Splash down is Dec 11th. Right now the capsule is 245,620 miles from earth and it is traveling at 457 mph. Obviously, it can't keep traveling that slow and reach earth in 5 days, so it will be interesting to see how it speeds up along the way. I know yall are all anxious to keep up with its progress.

[pork]

i'm not sure how this return flight to earth works, but it has slung around the moon and Orion is now headed back to earth.

Splash down is Dec 11th. Right now the capsule is 245,620 miles from earth and it is traveling at 457 mph. Obviously, it can't keep traveling that slow and reach earth in 5 days, so it will be interesting to see how it speeds up along the way. I know yall are all anxious to keep up with its progress.

you must be a riot at parties

[Animal]

i'm not sure how this return flight to earth works, but it has slung around the moon and Orion is now headed back to earth.

Splash down is Dec 11th. Right now the capsule is 245,620 miles from earth and it is traveling at 457 mph. Obviously, it can't keep traveling that slow and reach earth in 5 days, so it will be interesting to see how it speeds up along the way. I know yall are all anxious to keep up with its progress.

you must be a riot at parties

464 mph now.

[Animal]

499 mph now.

Its going to have to get up around 2500 mph.

[Antknot]

You should watch “Good night OPPY”on Amazon. About the Mars rovers.

[Charliesheen]

You should watch “Good night OPPY”on Amazon. About the Mars rovers.

Very interesting. Glad I watched it. But the last 20 minutes made me wanna wretch. Pobrecito scientists mourning the loss of their gravy train.

[Animal]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

[B-Tender]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

I read that the re-entry speed will be 24,500 mph. So I'm guessing that the earth's gravity will be kicking in quite a bit?

[Animal]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

I read that the re-entry speed will be 24,500 mph. So I'm guessing that the earth's gravity will be kicking in quite a bit?

one thing that i have learned on this mission, they use gravity in all kinds of ways to conserve fuel. (I noticed this first on the Webb mission when they flew that thing a million miles out into space and it slowed down as it went) actually, i don't think they hardly use any fuel other than to change directions. Once they use a tiny amount of fuel to change directions and start the swing around the moon, from there on its just gravity that flings it back to earth.

So, I agree, i think what we are seeing is that the earth's gravity is only pulling it at 718 mph right now, but as it gets closer that speed increases as the gravity is greater until it reaches that final 24,500 mph when it gets sucked into the atmosphere.

[stonedmegman]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

I read that the re-entry speed will be 24,500 mph. So I'm guessing that the earth's gravity will be kicking in quite a bit?

one thing that i have learned on this mission, they use gravity in all kinds of ways to conserve fuel. (I noticed this first on the Webb mission when they flew that thing a million miles out into space and it slowed down as it went) actually, i don't think they hardly use any fuel other than to change directions. Once they use a tiny amount of fuel to change directions and start the swing around the moon, from there on its just gravity that flings it back to earth.

So, I agree, i think what we are seeing is that the earth's gravity is only pulling it at 718 mph right now, but as it gets closer that speed increases as the gravity is greater until it reaches that final 24,500 mph when it gets sucked into the atmosphere.

There is no gravity. The Earth sucks.

[Animal]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

I read that the re-entry speed will be 24,500 mph. So I'm guessing that the earth's gravity will be kicking in quite a bit?

one thing that i have learned on this mission, they use gravity in all kinds of ways to conserve fuel. (I noticed this first on the Webb mission when they flew that thing a million miles out into space and it slowed down as it went) actually, i don't think they hardly use any fuel other than to change directions. Once they use a tiny amount of fuel to change directions and start the swing around the moon, from there on its just gravity that flings it back to earth.

So, I agree, i think what we are seeing is that the earth's gravity is only pulling it at 718 mph right now, but as it gets closer that speed increases as the gravity is greater until it reaches that final 24,500 mph when it gets sucked into the atmosphere.

There is no gravity. The Earth sucks.

i'm pretty sure its a combination of Oklahoma and TCU that is pulling Orion back to earth.

[Animal]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

1208 mph now. Splash down is around noon on Dec 11th. At the rate its increasing in speed I have it going around 4,000 mph when it gets to the earth's atmosphere. I guess that's where it really jumps up to 24,500 mph in re-entry.

[Antknot]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

1208 mph now. Splash down is around noon on Dec 11th. At the rate its increasing in speed I have it going around 4,000 mph when it gets to the earth's atmosphere. I guess that's where it really jumps up to 24,500 mph in re-entry.

Is that a linear calculation? Or did you account for the inverse square law of gravity. Or gravity increases as you get closer to the source of the gravity.

[Animal]

499 mph now.

Its going to have to get up around 2500 mph.

708 mph now. It is really going to have to speed up. It has 4 days to travel 238,144 miles. That would be averaging around 5,000 mph.

1208 mph now. Splash down is around noon on Dec 11th. At the rate its increasing in speed I have it going around 4,000 mph when it gets to the earth's atmosphere. I guess that's where it really jumps up to 24,500 mph in re-entry.

Is that a linear calculation? Or did you account for the inverse square law of gravity. Or gravity increases as you get closer to the source of the gravity.

I am usuing a polynomial equation: y = 97.386 x^2 - 9E+06 x + 11. where x = the time since orion started back to earth.

[Animal]

so, a 2nd order polynomial, i guess.