egg changed the topic of #principia to: READ THE FAQ: http://goo.gl/gMZF9H; The current version is Germain. We currently target 1.8.1, 1.9.1, 1.10.1, and 1.11.0. <scott_manley> anyone that doubts the wisdom of retrograde bop needs to get the hell out | https://xkcd.com/323/ | <egg> calculating the influence of lamont on Pluto is a bit silly… | <egg> also 4e16 m * 2^-52 is uncomfortably large
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<discord-> S​moked 939. — you would think someone would make a RO patch for mechjeb
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<discord-> S​umguy. — ???
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<discord-> l​amont. — you should do that
<_whitenotifier-c867> [Principia] rnlahaye synchronize pull request #2900: Use system allocator for containers on macOS (bypassing Unity's allocator) - https://git.io/JtpLC
<_whitenotifier-c867> [Principia] rnlahaye reviewed pull request #2900 commit - https://git.io/Jqktc
<_whitenotifier-c867> [Principia] rnlahaye reviewed pull request #2900 commit - https://git.io/JqktC
<_whitenotifier-c867> [Principia] rnlahaye reviewed pull request #2900 commit - https://git.io/JqktW
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<_whitenotifier-c867> [Principia] eggrobin reviewed pull request #2900 commit - https://git.io/JqkOH
<_whitenotifier-c867> [Principia] eggrobin labeled pull request #2900: Use system allocator for containers on macOS (bypassing Unity's allocator) - https://git.io/JtpLC
<_whitenotifier-c867> [Principia] pleroy closed pull request #2900: Use system allocator for containers on macOS (bypassing Unity's allocator) - https://git.io/JtpLC
<_whitenotifier-c867> [Principia] pleroy pushed 6 commits to master [+10/-2/±8] https://git.io/JqkOj
<_whitenotifier-c867> [Principia] rnlahaye 4301c8e - Ignore c99 extensions warning in make-based build. There are many intentional uses of the c99 designator initialization syntax in the codebase.
<_whitenotifier-c867> [Principia] rnlahaye ba326b7 - Fully qualify some std type invocations. This is necessary for the macOS alloc code to compile. The change in error_analysis_test.cpp is necessary because a non-Principia function is called which returns a ::std::vector. I'm not sure why the friend std::pair in discrete_trajectory.cpp needs full qualification.
<_whitenotifier-c867> [Principia] rnlahaye 10d86c3 - Add MallocAllocator and test.
<_whitenotifier-c867> [Principia] ... and 3 more commits.
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<_whitenotifier-c867> [Principia] pleroy pushed 1 commit to master [+0/-0/±1] https://git.io/Jqk1T
<_whitenotifier-c867> [Principia] pleroy a2987b2 - Version.
<_whitenotifier-c867> [Principia] eggrobin opened pull request #2904: Additions to the bibliography - https://git.io/Jqk1I
<_whitenotifier-c867> [Principia] Pending. Build queued… - 
<_whitenotifier-c867> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4816/
<_whitenotifier-c867> [Principia] eggrobin opened pull request #2905: Some fixes to our LaTeX package - https://git.io/Jqk1z
<_whitenotifier-c867> [Principia] Pending. Build queued… - 
<_whitenotifier-c867> [Principia] Failure. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4816/
<_whitenotifier-c867> [Principia] Pending. Building… - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4817/
<_whitenotifier-c867> [Principia] Failure. Build finished. - http://casanova.westeurope.cloudapp.azure.com:8080/job/Principia/4817/
<_whitenotifier-c867> [Principia] pleroy labeled pull request #2904: Additions to the bibliography - https://git.io/Jqk1I
<_whitenotifier-c867> [Principia] pleroy commented on pull request #2905: Some fixes to our LaTeX package - https://git.io/JqkH0
<discord-> J​oeV. — I am still having a few problems with getting to L4 in RSS. I thought a pic was warranted :
<discord-> J​oeV. — I am pretty sure that the apex of the left purple track is the L4 point. It definitely equi distant from the barycenter and the moon center : I think the gif is distorted in the X axis.
<discord-> S​tonesmile. — Is EM barycentric the best reference frame for the burns?
<discord-> J​oeV. — I am having problems _staying_ in the the region of the L4. I am, I think correctly, applying both tangernt and normal dv. but I enevitably drop out towards the earth
<discord-> J​oeV. — @Stonesmile I tried previously to do the transfer burn to L4, and then the "circuralization" burn to stay at L4 both in inertial earth centered, but I was having no luck
<discord-> S​tonesmile. — I haven't actually gone to L4 my self, but I know @Butcher has
<discord-> J​oeV. — Maybe he can give some pointers. I have seen the vids from Abrin, but I think that since he did those in stock, and the Mun is much smaller than Kerbin, that things are easier there. Go figure
<discord-> B​utcher. — Iirc I used emb for planning.
<discord-> J​oeV. — Certainly the L1 and L2 of Kerbin/Mun are _much_ closer to Mun than the L1 and L2 of Earth/Moon are to the moon
<discord-> J​oeV. — EMB?
<discord-> B​utcher. — Once you get there you should be able to get into a fairly stable orbit.
<discord-> B​utcher. — I was able to get around 1200 days at L4 without station keeping
<discord-> B​utcher. — Earth - Moon barycentric
<discord-> J​oeV. — Looking at the plot, and assuming that the apex of the purple lobe is the L4, should I try to make my stabilization burn before I get to L4, right on L4, radially outside of L4?
<discord-> J​oeV. — by plot, I mean the pic I provided
<discord-> B​utcher. — A little before I think.
<discord-> J​oeV. — Ok, and yes, I am doing all this in EMB
<discord-> B​utcher. — I just sort of messed around until our captured.
<discord-> J​oeV. — I tried earth inertial for the transfer and the burn to get some theta direction velocity to match the moon, but it was not working
<discord-> J​oeV. — In general, when you get up there from your transfer from LEO, you are going way slow, so you want to get about 800m/s to even stay up there, right?
<discord-> l​pg. — I'm speaking with little knowledge here, but if the apex is at L4, I'd have expected to need very little in the way of Normal burn to "stop" there
<discord-> J​oeV. — Yeah, that was what I was expecting as well, and the fact that this is not the case could be very well that I am incorrect about the accuracy of my transfer.
<discord-> J​oeV. — I had a ruler out and was measuring distances in EMB to make sure I had the triangle right... maybe not
<discord-> l​pg. — the two purple lobes don't _look_ distorted to me, with respect to each other... but if they're not, they don't seem to be getting close to the moon's "altitude"
<discord-> J​oeV. — Ah, if I am hitting the L4 like I think, I should see a distortion due to the effect of the moon beginning to make a difference?
<discord-> J​oeV. — before I even try to burn to stay up?
<discord-> l​pg. — oh I'm dumb, MJ is showing the Ap. 284Mm seems awfully low, no?
<discord-> J​oeV. — hmmm, good point, and MJ is always doing the apo relative to Earth's surface, right?
<discord-> l​pg. — yes
<discord-> J​oeV. — F-me, good catch, @lpg , sounds like I need to switch back to inertial Earth centered to do a sanity check on my apo when I am doing the first transfer.
<discord-> J​oeV. — and make sure it is at least close to 380,000km
<discord-> B​utcher. — You should need around 1km/s to insert iirc, mostly tangent.
<discord-> J​oeV. — ok, thanks guys. I will give it one more try before packing in the fun for the weekend. Thanks all.
<discord-> B​utcher. — You are essentially flying out to the apogee and circularising at the altitude of the moon, hence the fairly high fuel cost.
<_whitenotifier-c867> [Principia] joemos11 commented on issue #2903: Crash doing flightplanning w Principia - https://git.io/JqkdN
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<discord-> e​gg. — equidistant from the barycentre and whatever is not what you want (and the barycentre is not shown anyway)
<discord-> e​gg. — what you want is equidistant from the moon and the earth, and specifically, as far from either as they are from each other
<discord-> e​gg. — i.e., the Moon-Earth-L4 triangle is equilateral
<discord-> e​gg. — you are far too close to the earth in that picture