UmbralRaptor changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer. | We can haz pdf
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<UmbralRaptop> SnoopJeDi: haven't yet, but completed a shopping trip with I estimate 10 to 14 days of food >_>
<UmbralRaptop> (and now my arms are sore)
<SnoopJeDi> yay
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<kmath> <BLUEGALAXYDESI1> Scaled Comparison Of Outer Planet Missions https://t.co/MinuSkwxZ4
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<kmath> <A_J_Higgins> Teaching my compressible flow course online is giving me the opportunity to answer some long-standing questions, su… https://t.co/y46FyM9MdF
<kmath> https://twitter.com/dril/status/490366979749216256 <dril> awfully bold of you to fly the Good Year blimp on a year that has been extremely bad thus far
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<_whitenotifier-d13c> [Principia] pleroy commented on issue #2515: Mark Station keeping to be broken with Principia - https://git.io/Jvba7
<_whitenotifier-d13c> [Principia] pleroy closed issue #2515: Mark Station keeping to be broken with Principia - https://git.io/Jv7NC
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<_whitenotifier-d13c> [Principia] sthalik commented on issue #2324: Suggestion: don't remove the last manœuvre node from the navball - https://git.io/Jvbwc
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<iximeow> telescope drs pls help
<kmath> <iximeow> star on the left side, star in the middle, star on the right side. it appears something is mis-aligned. https://t.co/7xok80Y9Vd
<iximeow> what is wrong with my telescope
<iximeow> (i think the secondary is off a smidge to the right but i'm not sure what else this could be)
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<raptop> iximeow: coma, but not with the stars?
<iximeow> raptop: so i know i don't have my camera properly distanced
<iximeow> as a result i have some vingetting at the edges of the frame, and i'd expected comae radiating outward from the center
<iximeow> what i see is rightward coma on the left, and more rightward coma moving towards the right of the frame
<iximeow> https://cdn.discordapp.com/attachments/695886569088745492/695887088914268220/selection_004.png this is a full size image of the moon which i'd cropped a bit for twitter and then got jpeg'd, but,
<iximeow> i'm suspect of my focus across the field here too, and i'm not sure if that's related or if my sensor was a smidge off-perpendicular
<iximeow> (towards the left things look good, but at the upper right it *looks* a bit off? but i don't have many frames so it's hard to tell if this is one-off)
<raptop> mooooooooooon
* raptop is unsure, and randomly guesses that the focal plane is more of a focal curver
<iximeow> :D
<iximeow> actually
<iximeow> that might be consistent with the secondary being a bit off
<iximeow> (it is in fact a focal paraboloid, and iiuc having the sensor too close means i'm sampling towards the edges where the paraboloid stops being flattish)
<raptop> ah
<raptop> Also I thought this was the sort of cat where something, er, catostrophic would be necessary to misalign the secondary?
<iximeow> i've never had much trust in its collimation but also only recently gotten to a point i can reasonably suspect it
<raptop> hrm
* raptop tries to recall how SCTs do this. slightly tilting the primary?
<iximeow> three screws that mount the secondary also control its pivoting over the piece that it screws into the corrector plate with
<iximeow> that's what i suspect anyway
<raptop> Hopefully this is documented
<raptop> ...someone just delivered a big pile of groceries from wal-mart to my door o_O
<SnoopJeDi> wrong address?
<raptop> possibly
<raptop> I know I've gotten stuff that belongs on another floor before
<raptop> okay, they're for the family across the hall
<_whitenotifier-d13c> [Principia] eggrobin opened issue #2519: Spin-up on reentry under physics warp with FAR - https://git.io/JvbAL
<_whitenotifier-d13c> [Principia] eggrobin labeled issue #2519: Spin-up on reentry under physics warp with FAR - https://git.io/JvbAL
<_whitenotifier-d13c> [Principia] eggrobin assigned issue #2519: Spin-up on reentry under physics warp with FAR - https://git.io/JvbAL
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<egg|laptop|egg> whitequark: hm I think we use this construct somewhere https://twitter.com/whitequark/status/1246529599141556229
<kmath> <whitequark> skimming C++ code i wrote a few months ago https://t.co/E1rQLTEfaB
<egg|laptop|egg> dump it in an array first instead of using a (blah + ...) because evaluation order is specified for the array initializer and not the sum
<_whitenotifier-d13c> [Principia] eggrobin edited issue #2519: Spin-up on reentry under physics warp with FAR - https://git.io/JvbAL