Author Topic: Vulcan VC2S V001 - Peregrine Lander - CCSFS SLC-41 - 8 Jan 2024 (07:18 UTC)  (Read 417650 times)

Offline deadman1204

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A cynic would say ULA is not exactly prioritizing their employees, or those in the Space Force, by having them work on the 24th as well as the week leading up to it...
It's a Moon mission. The Moon is only in an optimal location for this mission once every 29-day lunar month. Your cynic would need to move the Moon around to allow for an earlier or later launch.
Theres also a 99% chance they wont hit this schedule anyways.

Online GewoonLukas_

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Regarding the launchtime:

Ben Cooper (Updated October 24th)
Quote
The first flight of the Vulcan rocket will send the Astrobiotic Peregrine lunar lander to the moon on December 24, in the middle of the night EST.
https://www.launchphotography.com/Launch_Viewing_Guide.html
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Online DanClemmensen

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A cynic would say ULA is not exactly prioritizing their employees, or those in the Space Force, by having them work on the 24th as well as the week leading up to it...
It's a Moon mission. The Moon is only in an optimal location for this mission once every 29-day lunar month. Your cynic would need to move the Moon around to allow for an earlier or later launch.
Theres also a 99% chance they wont hit this schedule anyways.
If they do not hit the Christmas window, I think they will need to wait about 29 days, to about 22 January.

Offline Phil Stooke

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Apollo-Phill:  "The Astrobotic web site for Peregrine has had some updates and now says that the target site is the Gruithuisen Gamma Dome ( see attached cropped NASA image) ."

I can't see that stated on the Astrobotic site.  Maybe it has been changed. 

Here:
https://www.lpi.usra.edu/pac/presentations/2023/june/02-ESSIO-Lunar-Kearns-Noble.pdf

is a presentation from June with coordinates placing the lander in the plains SW of the domes, in Sinus Viscositatis.

Here:

www.unmannedspaceflight.com/index.php?act=attach&type=post&id=53465

is a map showing the location.  The landing ellipse for this mission is too large for a site on the dome.

Online FutureSpaceTourist

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Tory on the launch time:

https://twitter.com/torybruno/status/1717123084396707856

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Somewhere between, “hell’uva party” and “Dad, it’s still nighttime!”

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Could you provide a conversion chart to UTC for those of us who have yet to upgrade to Vulcan Standard Time please?

https://twitter.com/torybruno/status/1717283985825448051

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My answer is in local time, so EST. I can be more specific soon, after we are satisfied with all of the analysis and coordination with the Payload

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https://twitter.com/torybruno/status/1717449090299011248

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The first flight Centaur V has come out of the High Pressure Test Cell for its final touches before shipment. #VulcanRocket #CountDowntoVulcan

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What’s left on the tick list for Vulcan now? It must be getting close to H hour now 🙂🥂

https://twitter.com/torybruno/status/1717455698110415340

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Finish up and ship the CV
Integrate CV with booster
Another WDR
Integrate the payload
Countdown and launch the world’s biggest and fastest XMAS gift
Ho Ho Ho

Online Vettedrmr

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Huh.  Bigger than Apollo 8.  Riiighhtttttt.
Aviation/space enthusiast, retired control system SW engineer, doesn't know anything!

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https://twitter.com/ulalaunch/status/1717574523220902402

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Today is the day we've been anticipating as the ULA team begins launch operations at Cape Canaveral to ready the first #VulcanRocket for its inaugural flight! We are targeting Dec. 24 for Certification-1 (#Cert1) to send a commercial lunar lander to the Moon. #CountdowntoVulcan

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https://twitter.com/ulalaunch/status/1717583778023883255

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The #VulcanRocket #Cert1 launch campaign includes hoisting the first stage aboard the Vulcan Launch Platform, installing two GEM 63XL solid rocket boosters, interstage & Centaur V, performing a final Wet Dress Rehearsal & attaching the encapsulated payload. #CountdowntoVulcan

Online DanClemmensen

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[from tweet]
Today is the day we've been anticipating as the ULA team begins launch operations at Cape Canaveral to ready the first #VulcanRocket for its inaugural flight! We are targeting Dec. 24 for Certification-1 (#Cert1) to send a commercial lunar lander to the Moon. #CountdowntoVulcan
What does "begins launch operations" mean? launch is in two months. Does this mean launch operations take two months?
« Last Edit: 10/26/2023 04:58 pm by DanClemmensen »

Offline Zed_Noir

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 :)

Someone should add an up or down poll to this thread to gauge how likely the inaugural Vulcan Centaur launch will happened in December.

 :)

Offline Zed_Noir

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Quote from: ULA tweet
Today is the day we've been anticipating as the ULA team begins launch operations at Cape Canaveral to ready the first #VulcanRocket for its inaugural flight! We are targeting Dec. 24 for Certification-1 (#Cert1) to send a commercial lunar lander to the Moon. #CountdowntoVulcan
What does "begins launch operations" mean? launch is in two months. Does this mean launch operations take two months?
Think it is the hoisting of the Vulcan booster onto the launch platform for stacking with the other components later.

Inaugural launches usually takes more preparations and reviews than operational launches.

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https://twitter.com/ulalaunch/status/1717611606538883477

Quote
Versatility. Affordability. Performance. Those are among the hallmarks of #VulcanRocket, offering efficient, high-tempo operations to launch commercial, civil and national security missions to any orbit. Join the excitement for Vulcan's #Cert1 launch targeted for Dec. 24!

Online GewoonLukas_

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Quote
[from tweet]
Today is the day we've been anticipating as the ULA team begins launch operations at Cape Canaveral to ready the first #VulcanRocket for its inaugural flight! We are targeting Dec. 24 for Certification-1 (#Cert1) to send a commercial lunar lander to the Moon. #CountdowntoVulcan
What does "begins launch operations" mean? launch is in two months. Does this mean launch operations take two months?

"Launch Vehicle On Stand" (hoisting the first stage onto the launch platform) marks the start of the launch campaign for ULA. They can do this much closer to launch, but since they have the time they just do it a little bit easier. Obviously they do also need a little bit of extra time because of the WDR that is planned.
« Last Edit: 10/26/2023 07:05 pm by GewoonLukas_ »
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https://twitter.com/torybruno/status/1717644649181925719

Quote
Still running ahead of schedule.  Here it is in the finishing station. #CountDowntoVulcan #VulcanRocket
« Last Edit: 10/26/2023 08:50 pm by FutureSpaceTourist »

Offline meekGee

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A cynic would say ULA is not exactly prioritizing their employees, or those in the Space Force, by having them work on the 24th as well as the week leading up to it...
It's a Moon mission. The Moon is only in an optimal location for this mission once every 29-day lunar month. Your cynic would need to move the Moon around to allow for an earlier or later launch.
Not a trajectory expert here, but the earth is rotating once every 24 hours, in the same direction, so 1.03 days later (approximately), in 2D, you'd be exactly where you started.

in 3D there's a difference between the equatorial plane and the lunar orbital plane (IIRC the lunar orbital plane is pretty close to the ecliptic, so some 23 degrees off of Earth's equatorial plane), but I don't think the influence of this is large, and it definitely doesn't work on the 24th and is gone on the 25th.

Now if there's a parking orbit that allows you to do TLI at your convenience, then that's another parameter you can tweak otw to the moon.
« Last Edit: 10/26/2023 10:58 pm by meekGee »
ABCD - Always Be Counting Down

Online DanClemmensen

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A cynic would say ULA is not exactly prioritizing their employees, or those in the Space Force, by having them work on the 24th as well as the week leading up to it...
It's a Moon mission. The Moon is only in an optimal location for this mission once every 29-day lunar month. Your cynic would need to move the Moon around to allow for an earlier or later launch.
Not a trajectory expert here, but the earth is rotating once every 24 hours, in the same direction, so 1.03 days later (approximately), in 2D, you'd be exactly where you started.

in 3D there's a difference between the equatorial plane and the lunar orbital plane (IIRC the lunar orbital plane is pretty close to the ecliptic, so some 23 degrees off of Earth's equatorial plane), but I don't think the influence of this is large, and it definitely doesn't work on the 24th and is gone on the 25th.

Now if there's a parking orbit that allows you to do TLI at your convenience, then that's another parameter you can tweak otw to the moon.
For this mission, what matters is when during the 29.5-day Lunar day-night cycle that Peregrine reaches the lunar surface. They want to arrive at the landing site during its lunar "morning" so their solar cells are lit. They also do not want to spend a long time in transit or idle in orbit, because the various payloads may have limited total lifetimes.

Offline meekGee

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A cynic would say ULA is not exactly prioritizing their employees, or those in the Space Force, by having them work on the 24th as well as the week leading up to it...
It's a Moon mission. The Moon is only in an optimal location for this mission once every 29-day lunar month. Your cynic would need to move the Moon around to allow for an earlier or later launch.
Not a trajectory expert here, but the earth is rotating once every 24 hours, in the same direction, so 1.03 days later (approximately), in 2D, you'd be exactly where you started.

in 3D there's a difference between the equatorial plane and the lunar orbital plane (IIRC the lunar orbital plane is pretty close to the ecliptic, so some 23 degrees off of Earth's equatorial plane), but I don't think the influence of this is large, and it definitely doesn't work on the 24th and is gone on the 25th.

Now if there's a parking orbit that allows you to do TLI at your convenience, then that's another parameter you can tweak otw to the moon.
For this mission, what matters is when during the 29.5-day Lunar day-night cycle that Peregrine reaches the lunar surface. They want to arrive at the landing site during its lunar "morning" so their solar cells are lit. They also do not want to spend a long time in transit or idle in orbit, because the various payloads may have limited total lifetimes.

Ah that makes sense...  I said I wasn't an expert!

But still - is there a parking orbit?  Because if yes, then you can design the campaign (and vehicle) with a couple of days there, and then you gain flexibility in when you actually launch.  Are they taking a direct transfer orbit there?
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Online DanClemmensen

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A cynic would say ULA is not exactly prioritizing their employees, or those in the Space Force, by having them work on the 24th as well as the week leading up to it...
It's a Moon mission. The Moon is only in an optimal location for this mission once every 29-day lunar month. Your cynic would need to move the Moon around to allow for an earlier or later launch.
Not a trajectory expert here, but the earth is rotating once every 24 hours, in the same direction, so 1.03 days later (approximately), in 2D, you'd be exactly where you started.

in 3D there's a difference between the equatorial plane and the lunar orbital plane (IIRC the lunar orbital plane is pretty close to the ecliptic, so some 23 degrees off of Earth's equatorial plane), but I don't think the influence of this is large, and it definitely doesn't work on the 24th and is gone on the 25th.

Now if there's a parking orbit that allows you to do TLI at your convenience, then that's another parameter you can tweak otw to the moon.
For this mission, what matters is when during the 29.5-day Lunar day-night cycle that Peregrine reaches the lunar surface. They want to arrive at the landing site during its lunar "morning" so their solar cells are lit. They also do not want to spend a long time in transit or idle in orbit, because the various payloads may have limited total lifetimes.

Ah that makes sense...  I said I wasn't an expert!

But still - is there a parking orbit?  Because if yes, then you can design the campaign (and vehicle) with a couple of days there, and then you gain flexibility in when you actually launch.  Are they taking a direct transfer orbit there?
I'm not sure. I am absolutely not an expert, nor do I have any special knowledge of this mission. In fact, my original post was about a generic lander mission and I had to verify it (by reading the peregrine user's manual) to verify that it is in fact a lunar day mission that will more or less die when the sun goes down. Yes, there is some leeway in the launch and I think it's accomodated by varying the orbit and therefore the total time between Earth launch and Lunar landing. This is where the three-day window comes from. But shorter is better because the some payloads may have limited lifetimes (I think. The manual describes the Peregrine, not its payloads.)

 

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