Help - Search - Members - Calendar
Full Version: Lucy
Unmanned > Other Missions > Cometary and Asteroid Missions
Obligatory new thread for the Lucy mission, now that it has been selected by NASA to launch as Discovery mission 13! Lucy will launch in 2021, and will perform a flyby of a main belt asteroid in 2025, before making flybys of at least six Jupiter trojans from 2027 to 2033. The mission, led by the Southwest Research Institute and Principal Investigator Harold F. Levison, will send a spacecraft carrying updated versions of New Horizons' LORRI and RALPH instruments.

Be sure to check out r/lucymission on reddit as well!

EDIT: I have made a mistake. Could a kind mod please move this thread to the "Cometary and Asteroid Missions" subforum? wacko.gif

ADMIN: Done.

Note for the new members: Generally speaking, please consult a member of the admin/mod team before creating new topics. Not a hard rule, but it does help to keep the place tidy. Also, we encourage all members to review this welcome post for orientation purposes. Thanks! smile.gif
Very excited for this mission. I'm a sucker for seeing new worlds, and I didn't realize Patroclus-Menoetius was a target for Lucy until it was selected. And so many others, too! smile.gif
This new paper on arXiv suggests that Jupiter formed past Neptune and then migrated inwards to its current orbit, sweeping up the Jupiter Trojan asteroids with it. They make a compelling case, that explains the otherwise inexplicable asymmetry between the leading and trailing Trojan clouds.

This would mean that there is an incredible compositional diversity within the Trojans, due to their origins ranging from the inner Kuiper belt to the location of the current Hilda asteroids. So the Lucy mission has the opportunity to visit bodies originating throughout the middle and outer solar system, which makes it even more important for understanding the history of the solar system.
Holder of the Two Leashes
They are ready to start building the spacecraft.

Link: Lucy passes Critical Design Review
Cool news a satellite discovered around one of the flyby targets!
Turns out Lucy might get pretty darn close to said Satellite:

(Tweets from June)

Lucy scheduled for Launch in October.
Some open-access papers about the Lucy mission here:
Lucy launch is only 2 days away. We are now powered for the last time and this AM moved to the pad at LC41 and looking at a nice early AM launch on 10/16 (0934 UTC, 0534 EDT) with great weather forecasat. Hope everyone is going to get up early with us for launch. There was a very good pre-launch press briefing yesterday that is on YouTube (sorry for all the commercials I could not find any alternate hosting sites,YouTube video link). Hope you have a chance to watch the launch live (or after getting up for those in the US). I have seen some questions on forums such as reddit asking what propulsion elements Lucy has (All of the following info is not export controlled so I can provide these answers here). We have eight 1 N and six 22 N mono-propellant thrusters for ACS and the majority of the trajectory correction maneuvers (up to 50 m/sec). For larger burns we have a 470 N bi-propellant main engine (Leros 1C). The propellants are hydrazine and dinitrogen tetroxide. There are currently 4 burns over 7 years that will use our main engine. We won't need to use that engine till mid 2024 (large DSM to target Earth for an Earth flyby). Go Lucy!!!
Some of us here are on the science team too- happy to (attempt to) answer any science questions.

At the Cape, trying to type with fingers crossed!

Sure, we really appreciate it, having representatives from both side of the mission coin on here!

Having watched the briefing from earlier; will the geometry of the Earth flybys allow for some great (colourful) views for L'LORRI (or even during commissioning)? LORRI on New Horizons never looked back at Earth even to this day....
Imaging the Earth will likely be done for calibration, but we might have saturation issues, so donít yet know how pretty the pictures will be. The moon will also likely be a calibration target and less likely to saturate. The geometry will depend on our launch date, so weíll know soon!

Ron Hobbs
Watched the Science Press Conference today. Excited to follow this mission.

Holder of the Two Leashes
Hmmm. Since this Atlas launch will be without any SRBs, a couple of shock diamonds might be just barely visible in the far end of the exhaust of the rocket.

If so, I can think of a caption for that photo ...
Hoping to keep my eyes open long enough to watch the launch tonight.

Go up early to watch the launch! Beautiful! All the best to the team, and looking forward to the first images!
1 year to Earth flyby....
I also watched the launch this morning--it is always breathtaking. I understand the huge solar panels unfolded properly.
Tom Tamlyn
The best general media article Iíve run across concerning the Lucy Mission is this one in the New York Times. (I assume itís paywalled, although the NYT is a little more generous with free articles than it was.)

The article is nicely written, features some particularly good graphics, and most importantly, feels more comprehensive than is typical for the twenty-first century NYT science section.

This was a mild surprise. Iím a life-long reader and admirer of the New York Times science desk. However, since the MER rover missions renewed and intensified my interest in planetary science in 2004, Iíve frequently felt that the NYTís fine writers were not allowed enough ink to do do justice to planetary missions. I began to rely much more on specialist journals and online sources, especially Emily Lakdawalla, and particularly during her time at the Planetary Society, and of course this forum.

The article's author, David W. Brown, is a freelancer who has apparently just published a book on the Europa Clipper mission with the following title:

THE MISSION, or: How a Disciple of Carl Sagan, an Ex-Motocross Racer, a Texas Tea Party Congressman, the World's Worst Typewriter Saleswoman, California Mountain People, and an Anonymous NASA Functionary Went to War with Mars, Survived an Insurgency at Saturn, Traded Blows with Washington, and Stole a Ride on an Alabama Moon Rocket to Send a Space Robot to Jupiter in Search of the Second Garden of Eden at the Bottom of an Alien Ocean Inside of an Ice World Called Europa (A True Story)

I'm not a fan of goofy long book titles that don't include useful search terms in the first few words, or in this case, anywhere at all, but on the strength of Brown's article about Lucy, I'm going to read his book.
I posted a minor review of the audiobook in the Europa Clipper thread:
He's a good writer, though naturally he can only write about non-confidential subject matter, so he is limited to some degree.
Re: NYT: this reads like a Science Tuesday section front page, and that's where I'd expect to see it in print.
QUOTE (Holder of the Two Leashes @ Oct 15 2021, 05:11 PM) *
Hmmm. Since this Atlas launch will be without any SRBs, a couple of shock diamonds might be just barely visible in the far end of the exhaust of the rocket.

I think this tweet (direct image link) might show such.

Also, the Spaceflight Now article has "A tiny diamond buried deep inside the L’TES spectrometer acts as a beam splitter".
They're optimistic that it's not a major issue: RCS thrusters worked already, main change has been a delay in deploying the instrument platform:
EDIT: More details, directly from the team:
This is a "lo-fi" version of our main content. To view the full version with more information, formatting and images, please click here.
Invision Power Board © 2001-2021 Invision Power Services, Inc.