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BumRushDaShow

(128,552 posts)
Tue Jul 5, 2022, 04:04 PM Jul 2022

NASA's tiny CAPSTONE probe goes silent on its way to the moon

Source: Space.com


Artist's illustration of NASA's tiny CAPSTONE probe in its halo-shaped lunar orbit. CAPSTONE is scheduled to arrive at the moon on Nov. 13, 2022, but that future is in doubt; mission team members lost contact with the cubesat shortly after it began flying freely on July 4. (Image credit: NASA/Daniel Rutter)


CAPSTONE has gone dark. The 55-pound (25 kilograms) NASA probe ceased communicating with its handlers yesterday (July 4), shortly after it deployed successfully from Rocket Lab's Photon spacecraft bus and began its long trek to the moon. "The spacecraft team currently is working to understand the cause and re-establish contact. The team has good trajectory data for the spacecraft based on the first full and second partial ground station pass with the Deep Space Network," NASA spokesperson Sarah Frazier wrote in an emailed statement today (July 5).

"If needed, the mission has enough fuel to delay the initial post-separation trajectory correction maneuver for several days," Frazier added. "Additional updates will be provided as soon as possible." CAPSTONE (short for "Cislunar Autonomous Positioning System Technology Operations and Navigation Experiment" ) launched atop a Rocket Lab Electron booster on June 28 and spent nearly a week in Earth orbit, spiraling farther and farther away from our planet via occasional Photon engine burns.

The mission notched two huge milestones yesterday: The Photon fired its engine for a final time, accelerating CAPSTONE out of Earth orbit and on a path toward the moon. Shortly thereafter, the microwave-oven-sized cubesat successfully separated from the spacecraft bus and began flying freely.

If all goes according to plan, CAPSTONE will take a long, looping route to the moon, finally slipping into a near rectilinear halo orbit around Earth's natural satellite on Nov. 13. The mission's main goal is to test the stability of this highly elliptical orbit, which NASA has selected for its Gateway space station, a key piece of the agency's Artemis program of lunar exploration.

Read more: https://www.space.com/nasa-capstone-moon-cubesat-communication-loss



More at NASA here - https://blogs.nasa.gov/artemis/2022/07/05/capstone-update-on-communications-issue/

Crossing fingers they can get a hold of it!
22 replies = new reply since forum marked as read
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NASA's tiny CAPSTONE probe goes silent on its way to the moon (Original Post) BumRushDaShow Jul 2022 OP
Why does it take from July to November to get to the moon? mahatmakanejeeves Jul 2022 #1
It's like a water craft on idle drifting its way there to conserve power and get into an odd orbit BumRushDaShow Jul 2022 #4
Explanation VMA131Marine Jul 2022 #5
Explanation.............................................................? 3Hotdogs Jul 2022 #13
It uses very small thrusters SpankMe Jul 2022 #6
"new story from late yesterday or early today that they lost contact with CAPSTONE" BumRushDaShow Jul 2022 #9
"Very small thrusters" orangecrush Jul 2022 #19
Well, shit. n/t SpankMe Jul 2022 #2
Capstone is probably just embarrassed about all the shootings. n/t FSogol Jul 2022 #3
Awww, little CAPSTONE . Hope you can recover. electric_blue68 Jul 2022 #7
Is there a government department of acronyms out there? OnlinePoker Jul 2022 #8
"CAPSTONE" *is* the acronym! BumRushDaShow Jul 2022 #10
I know. That was the point of my post. OnlinePoker Jul 2022 #14
Oh I know BumRushDaShow Jul 2022 #16
Of course. orangecrush Jul 2022 #18
Sure. It's the Central Organization for ... muriel_volestrangler Jul 2022 #15
Look into MESSENGER the Mercury orbiter... reACTIONary Jul 2022 #20
I glad DUers post such events JohnnyRingo Jul 2022 #11
Lots of science nerds here BumRushDaShow Jul 2022 #12
... orangecrush Jul 2022 #17
As long as they didn't build it with parts from imavoter Jul 2022 #21
They probably put Windows 10 on it to save money--now it's blue screening Bengus81 Jul 2022 #22

mahatmakanejeeves

(57,319 posts)
1. Why does it take from July to November to get to the moon?
Tue Jul 5, 2022, 04:10 PM
Jul 2022

{edit: not "stop," "exit."}

That's like one exit to the next on the New Jersey Turnpike.

BumRushDaShow

(128,552 posts)
4. It's like a water craft on idle drifting its way there to conserve power and get into an odd orbit
Tue Jul 5, 2022, 04:20 PM
Jul 2022




And the Turnpike is even slower than that if the exit is closed for construction... then you gotta go 10 miles to the next one, where there's always a backup.

VMA131Marine

(4,136 posts)
5. Explanation
Tue Jul 5, 2022, 04:27 PM
Jul 2022

Simply there isn’t nearly enough fuel to do a lunar transfer orbit like Apollo’s. So a bit of creative orbital mechanics is required to give the spacecraft enough energy to get it out to the moon.

https://www.space.com/nasa-capstone-moon-cubesat-long-journey-explained

3Hotdogs

(12,337 posts)
13. Explanation.............................................................?
Tue Jul 5, 2022, 05:45 PM
Jul 2022

Did'ja ever hear of a planet, filled with bastids called, "Ronulans?"

SpankMe

(2,957 posts)
6. It uses very small thrusters
Tue Jul 5, 2022, 04:35 PM
Jul 2022

The spacecraft is 55 LBS and could fit in the passenger seat of your car (without the solar panels deployed). Details are hard to find, but it looks like it uses hydrazine fuel pumped through a catalyst bed to provide a few ounces of thrust over short durations (tens of seconds). The fuel quantity is very limited in a 55 LB spacecraft, so they're using short, carefully timed and engineered thrusts to tweak the trajectory while using gravity and its initial delta-V in long coast periods to get to the moon.

If they could attach 200-gallons of fuel and thrust in tens of lbs rather than a few ounces, then they would get there a lot faster. But, the CAPSTONE mission is a technology demonstrator with one of the objectives being a demonstration of a super low energy trip to the moon.

There was a new story from late yesterday or early today that they lost contact with CAPSTONE. I think the mission's lost at this point. But, we'll see what they can do.

BumRushDaShow

(128,552 posts)
9. "new story from late yesterday or early today that they lost contact with CAPSTONE"
Tue Jul 5, 2022, 05:20 PM
Jul 2022

That's what the OP is about! (yes smiley pun intended )

OnlinePoker

(5,719 posts)
8. Is there a government department of acronyms out there?
Tue Jul 5, 2022, 05:02 PM
Jul 2022

We want to call the satellite CAPSTONE. Here's what it does. Come up with something that fits.

OnlinePoker

(5,719 posts)
14. I know. That was the point of my post.
Tue Jul 5, 2022, 06:39 PM
Jul 2022

They come up with a word they want to use and then develop an acronym to fit it.

BumRushDaShow

(128,552 posts)
16. Oh I know
Tue Jul 5, 2022, 07:00 PM
Jul 2022

(as a retired fed - we even used to do stupid stuff like that during the period when "teams" were the latest fad (I think when GPRA was first enacted) and you even named it and spent who knows how long coming up with all this stuff to define the "team" while you could have been working on the problem at hand )

muriel_volestrangler

(101,272 posts)
15. Sure. It's the Central Organization for ...
Tue Jul 5, 2022, 06:51 PM
Jul 2022

Neologisms and Trivial Retrofitted Initialisms with Very Elastic Definitions.

Or CONTRIVED.

reACTIONary

(5,769 posts)
20. Look into MESSENGER the Mercury orbiter...
Tue Jul 5, 2022, 09:48 PM
Jul 2022

... Mercury, the MESSENGER to the gods. Very clever... should have left it at that. But no, it had to be backronymed.

https://en.wikipedia.org/wiki/Backronym

imavoter

(646 posts)
21. As long as they didn't build it with parts from
Wed Jul 6, 2022, 12:19 AM
Jul 2022

a Samsung refrigerator-freezer icemaker,
there's a chance they could get it working.
🤷?♀️

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