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!
mahatmakanejeeves
(57,319 posts){edit: not "stop," "exit."}
That's like one exit to the next on the New Jersey Turnpike.
BumRushDaShow
(128,552 posts)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)Simply there isnt nearly enough fuel to do a lunar transfer orbit like Apollos. 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)Did'ja ever hear of a planet, filled with bastids called, "Ronulans?"
SpankMe
(2,957 posts)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)That's what the OP is about! (yes smiley pun intended )
orangecrush
(19,436 posts)SpankMe
(2,957 posts)FSogol
(45,456 posts)electric_blue68
(14,833 posts)OnlinePoker
(5,719 posts)We want to call the satellite CAPSTONE. Here's what it does. Come up with something that fits.
BumRushDaShow
(128,552 posts)https://www.nasa.gov/directorates/spacetech/small_spacecraft/capstone
OnlinePoker
(5,719 posts)They come up with a word they want to use and then develop an acronym to fit it.
BumRushDaShow
(128,552 posts)(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 )
orangecrush
(19,436 posts)It's totally obvious!
muriel_volestrangler
(101,272 posts)Neologisms and Trivial Retrofitted Initialisms with Very Elastic Definitions.
Or CONTRIVED.
reACTIONary
(5,769 posts)... 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
JohnnyRingo
(18,619 posts)I love this stuff and I would miss a lot if not for you.
K&R
BumRushDaShow
(128,552 posts)(and retired ones like me!!! )
orangecrush
(19,436 posts)imavoter
(646 posts)a Samsung refrigerator-freezer icemaker,
there's a chance they could get it working.
🤷?♀️