Author Topic: SpaceX News  (Read 127052 times)

WLJ

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Re: SpaceX News
« Reply #1750 on: September 25, 2022, 03:16:24 PM »
Debating on weather, pun!, or not to roll SLS back.
Suppose to decide by 20:00
Crawler is staged underneath
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WLJ

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Re: SpaceX News
« Reply #1751 on: September 26, 2022, 10:18:27 AM »
NASA has deferred a decision on roll back to today.
Crawler on standby underneath
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WLJ

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Re: SpaceX News
« Reply #1752 on: September 26, 2022, 10:19:24 AM »
Meanwhile DART is on target.

Quote
The Double Asteroid Redirection Test (DART) spacecraft, launched last November, is on a trajectory to collide with Dimorphos, a small asteroid orbiting the larger near Earth asteroid Didymos, at 7:14 p.m. Eastern Sept. 26. The collision will change slightly the orbit of Dimorphos, allowing scientists to measure how effective such a collision, or “kinetic impact,” could be to change the trajectory of any future asteroids that pose a hazard to the Earth.

DART on track for asteroid collision
https://spacenews.com/dart-on-track-for-asteroid-collision/
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WLJ

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Re: SpaceX News
« Reply #1753 on: September 26, 2022, 11:00:53 AM »
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WLJ

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Re: SpaceX News
« Reply #1754 on: September 26, 2022, 04:15:04 PM »
Suppose to go live at 18:00

DART Asteroid Impact LIVE with Mission Team
https://www.youtube.com/watch?v=yrxPT8UFJRM
« Last Edit: September 26, 2022, 06:03:07 PM by WLJ »
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WLJ

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Re: SpaceX News
« Reply #1755 on: September 26, 2022, 06:03:18 PM »
DART!  [popcorn]
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WLJ

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Re: SpaceX News
« Reply #1756 on: September 26, 2022, 07:14:24 PM »
30 seconds
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WLJ

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Re: SpaceX News
« Reply #1757 on: September 26, 2022, 07:16:35 PM »
Impact
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WLJ

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Re: SpaceX News
« Reply #1758 on: September 26, 2022, 07:20:39 PM »
Bullseye in fact
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WLJ

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Re: SpaceX News
« Reply #1759 on: September 27, 2022, 08:53:22 AM »
Some tracks show Ian hitting The Cape dead on others show it to going to the north and west

SLS going into the barn right now.
SpaceX appears to be getting ready.
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AZRedhawk44

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Re: SpaceX News
« Reply #1760 on: September 27, 2022, 11:27:58 AM »
That DART mission was amazing.  I'm looking forward to the calculations demonstrating on whether or not we can rely upon simple Newtonian physics to nudge potential threats in the future, or if layers of shock absorber on the threat will make that impossible or unreliable.

The images of the target were incredible.  I was expecting a coagulation of dust motes, not a collapsed skyscraper of rubble.  The jaggedness and size of the rocks on the target was astounding.
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Fly320s

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Re: SpaceX News
« Reply #1761 on: September 27, 2022, 11:40:33 AM »
That DART mission was amazing.  I'm looking forward to the calculations demonstrating on whether or not we can rely upon simple Newtonian physics to nudge potential threats in the future, or if layers of shock absorber on the threat will make that impossible or unreliable.

The images of the target were incredible.  I was expecting a coagulation of dust motes, not a collapsed skyscraper of rubble.  The jaggedness and size of the rocks on the target was astounding.

I saw the video, but couldn't tell the scale/size of the rocks.  Has anyone overlayed a scale on the photos?

At what angle was the asteroid hit?  Probably not head-on, but was it a front quarter or rear quarter or just a t-bone?
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AZRedhawk44

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Re: SpaceX News
« Reply #1762 on: September 27, 2022, 12:11:43 PM »
I saw the video, but couldn't tell the scale/size of the rocks.  Has anyone overlayed a scale on the photos?

At what angle was the asteroid hit?  Probably not head-on, but was it a front quarter or rear quarter or just a t-bone?

I haven't seen an overlay.  I was watching live on the NSF youtube feed, and they had a few NASA mission leads on during it.  I got the impression that the final two images we were looking at a resolution of under a foot per pixel.  The entire object is around 160 meters across, and as the impactor is closing on it during the last 30 seconds you can see solid protrusions that are a good 5-10 meters in size.  Spitballing, I'd guess the final full image sent prior to the partial red image, the rock in the center was 3-5 meters across?  Andy Cheng suggested it was somewhere between 5-10cm per pixel on the final full image, but we don't know the resolution of the images themselves.  I have read one PDF that suggests it is 2560 x 2160 pixels.  Cheng went on to say the final rocks were beach ball sized, or you could hold in your hands.

We won't know the momentum impact for a few days probably.  Cheng suggested it was an incredibly square impact to the center of the target.  No word on if the visual center of the target corresponds to the center of mass of it.  Density differences could cause funkiness.
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WLJ

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Re: SpaceX News
« Reply #1763 on: September 27, 2022, 12:22:14 PM »
And we're finding that many asteroids including this one aren't the classic big solid rock that usually comes to mind when someone says asteroid but rather many are a loose collection of rocks and gravel, basically rubble with no solid surface to land on. Be interesting to see what effect the impact had.

Here's what happened when we tried landing a sample mission on Bennu

Asteroid Bennu’s Surprising Surface Revealed by NASA Spacecraft
https://www.youtube.com/watch?v=42EwbQ3afPA
« Last Edit: September 27, 2022, 12:36:06 PM by WLJ »
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WLJ

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Re: SpaceX News
« Reply #1764 on: September 27, 2022, 01:26:01 PM »
Scott Manley
Video and images from telescopes showing the plume from the impact. Of particular note are the just released images from DART's partner cube sat starting at 7:00

Asteroid Smashing Looks Like Nothing You Ever Imagined
https://www.youtube.com/watch?v=hg4DiOmKlVM
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WLJ

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Re: SpaceX News
« Reply #1765 on: September 27, 2022, 02:09:00 PM »
I saw the video, but couldn't tell the scale/size of the rocks.  Has anyone overlayed a scale on the photos?


Scott says the photo at 1:14 is about 100 meters across.

https://youtu.be/hg4DiOmKlVM?t=74
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WLJ

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Re: SpaceX News
« Reply #1766 on: September 28, 2022, 10:31:57 AM »
 :rofl:

NASA Saves Face By Claiming Female Astronaut Running Spaceship Into Asteroid Was Intentional
https://babylonbee.com/news/nasa-saves-face-by-claiming-female-astronaut-running-spaceship-into-asteroid-was-intentional
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WLJ

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Re: SpaceX News
« Reply #1767 on: September 28, 2022, 10:48:47 AM »
Looks like they made the right choice in hauling SLS back in.
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RocketMan

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Re: SpaceX News
« Reply #1768 on: September 28, 2022, 12:04:19 PM »
Looks like they made the right choice in hauling SLS back in.

Agreed.  For a while it looked like they were going to let Artemis 1 sit on the pad.  A couple of NASA bureaucrats were arguing for that to be done.
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cordex

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Re: SpaceX News
« Reply #1769 on: September 28, 2022, 12:52:54 PM »
Agreed.  For a while it looked like they were going to let Artemis 1 sit on the pad.  A couple of NASA bureaucrats were arguing for that to be done.
If it were to be destroyed by a hurricane maybe it would reduce the embarrassment of it constantly failing to launch.

AZRedhawk44

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Re: SpaceX News
« Reply #1770 on: September 28, 2022, 01:16:03 PM »
If it were to be destroyed by a hurricane maybe it would reduce the embarrassment of it constantly failing to launch.

They tried in the VAB, apparently.

https://www.autoevolution.com/news/fire-alarm-rings-in-nasa-vehicle-assembly-building-after-the-artemis-i-rocket-gets-there-199817.html

There was an electrical fire in VAB high bay 3:  The SLS bay.

While the orange tank is obviously detanked, Orion is still integrated as well as the SRB's.  Orion has a launch escape tower that is a fueled solid rocket system, and the service module attached to Orion I believe is fueled with hypergolics for propulsion use after separation from the ICPS hydrolox stage.  Those hypergolics are not detanked at the pad; the VAB is where they are fueled and/or de-fueled.  Hypergolics are supposed to be "safe" for long term storage, which is why they're popular for space propulsion of components that are challenging to fuel on the pad or not likely to use their cryogenic load before it warms up.

The SRB's (and Artemis 1 in general) are following in the finest NASA tradition of Challenger; being given excuse after excuse to be used in spite of test failures, expiration dates, and GSE failures.  I really expected them to launch in the hurricane with a former Thiokol exec on the phone saying "nah, it'll be fine!" at pre-launch about 10 minutes before explosion of the stack at 60,000 feet altitude.  In classic NASA contractor logic, a hurricane would certainly make it hard for leaking GSE hydrogen to pool dangerously anywhere.  That's a plus, right?
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WLJ

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Re: SpaceX News
« Reply #1771 on: September 28, 2022, 01:25:01 PM »

https://www.autoevolution.com/news/fire-alarm-rings-in-nasa-vehicle-assembly-building-after-the-artemis-i-rocket-gets-there-199817.html

From the above article

Quote
At the time of writing, hurricane Ian is hurtling toward Florida, and it could be a category 4 storm by the time it reaches it. That means winds of up to 156 mph (251 kph) and the potential of making a mess of the place

Think I remember hearing the VAB was rated for 120mph winds

Hurricane Frances blew off a bunch of panels and I think another took off some as well. Don't know what the winds were at the time.
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WLJ

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Re: SpaceX News
« Reply #1772 on: September 29, 2022, 08:47:21 AM »
Thursday morning rocket engines

First BO with their BE-4 firing for over 4 minutes

BlueOrigin #BE4 rocket engine for ULA #VulcanRocket - full firing sequence
https://www.youtube.com/watch?v=1-dr2Df8AaA

Next SX's Raptor 2 showing off it's Rapid Relight

SpaceX Tests Raptor Engine Rapid Relight
https://www.youtube.com/watch?v=BO5Uu6xA3N8
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WLJ

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Re: SpaceX News
« Reply #1773 on: September 29, 2022, 09:10:13 AM »
Other than being a bit soggy the Cape looks fine.

https://www.youtube.com/watch?v=gnt2wZBg89g
« Last Edit: September 29, 2022, 11:08:32 AM by WLJ »
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WLJ

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Re: SpaceX News
« Reply #1774 on: September 29, 2022, 04:26:59 PM »
Possible Hubble service mission in the works?

Quote
The press conference about "potential commercial space opportunities for NASA science missions" will begin at 4:30 p.m. EDT (2030 GMT).

Quote
The participants in the briefing are:

    Thomas Zurbuchen, associate administrator, NASA's Science Mission Directorate
    Kathy Lueders, associate administrator, NASA's Space Operations Mission Directorate
    Jessica Jensen, vice president, customer operations and integration, SpaceX
    Jared Isaacman, commercial astronaut and commander of Polaris Dawn
    Patrick Crouse, Hubble Space Telescope project manager, NASA's Goddard Space Flight Center

SpaceX, NASA and Hubble officials to discuss mysterious new study today: Listen live
https://www.space.com/spacex-nasa-hubble-science-commercial-study-preview

YT https://www.youtube.com/watch?v=PZ0L2aQgcI4

Listening
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