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`mose.giordano`

Congratulations and good work to all students π
`aquatiko`

Hello everyone!! Rohit here... Hoping to spend a great summer with openAstronomy and GSoC!!
`bsipocz`

feeding it into the suborg's blog is welcome, but we still a separate stream for the student that is also fed into the OA list,.
`Github [@Cadair:matrix.org]`

[OpenAstronomy/openastronomy.github.io] shreyasbapat opened pull request #221: Add EinsteinPy to OpenAstronomy [open] - OpenAstronomy/openastronomy.github.io#221
`astrojuanlu`

also, the "directions" page of STScI is under construction http://www.stsci.edu/institute/brc/facilities/Directions.html
`Github [@Cadair:matrix.org]`

[OpenAstronomy/openastronomy.github.io] dpshelio opened issue #222: Resource for new contributors? [open] - OpenAstronomy/openastronomy.github.io#222
`Github [@Cadair:matrix.org]`

[OpenAstronomy/openastronomy.github.io] dpshelio edited issue #222: Resource for new contributors? [open] - OpenAstronomy/openastronomy.github.io#222
`Github [@Cadair:matrix.org]`

[OpenAstronomy/openastronomy.github.io] bsipocz opened issue #223: astropy gsoc 2020 ideas [open] - OpenAstronomy/openastronomy.github.io#223
`jorgepiloto`

Hi OpenAstronomy people! It is Jorge, from the `poliastro`

package πποΈ

I was wondering if anyone has ever heard about an algorithm called `Improved Gauss method`

for solving Kepler's problem. I found it on Battin 1999 [pag 234]. It is supposed to be a high performance propagator for near-parabolic orbits but after implementing it seems to not converge for some orbits.

So if anyone has more information it would be tremendously usefull! Best regards π

`jorgepiloto`

By the way, if you want to take a closer look to its current status here is the link to the PR I did: https://github.com/poliastro/poliastro/pull/631/files
`mose.giordano`

I find the method in http://dx.doi.org/10.1007/BF00691917 very interesting: it works in the entire elliptical regime and is non-iterative @jorgepiloto:matrix.org
`jorgepiloto`

Wow mose.giordano ! That method looks really good. Thank you so much for your time, hope to have the algorithm implemented before poliastro 0.13 version. I am obsessed with finding a `fast-convergence-all-possible-eccentricities-crazy-kepler-solver`

π, so that paper will be usefull for sure
`jorgepiloto`

It states that realtive errors are of the order of 10e-16 and due solely to machine arithmetic roundoff! I'll let you know once the algorithm will be working. Thank you again π
`mose.giordano`

I wrote a Julia implementation of the "naive" method in https://github.com/JuliaAstro/AstroLib.jl/blob/fb2ef587a2ac68a1c864bf251e8d9c3601ec4719/src/kepler_solver.jl The paper is really straightforward, it's incredibly easy to implement. Probably the "non-naive" method is a little bit less trivial
`HarveyPwca on Freenode`

Goodbye Aberration: Physicist Solves 2,000-Year-Old Optical Problem https://petapixel.com/2019/07/05/goodbye-aberration-physicist-solves-2000-year-old-optical-problem/
`astrojuanlu`

π π²π½
`jorgepiloto`

Hi everyone! Hope you are spending a really good summer if you are in the northern hemisphere.

I am trying to implement the `U.S. Atmosphere 1976`

a.k.a `COESA76`

and got stucked with the pressure equations for geometric altitudes avobe `Z>86km`

. If someone knows any software, routine or algorithm where I can check the implementation and compare with the official NASA document it would be so useful π

`jorgepiloto`

Oh, and for those in southern hemisphere, happy winter π
`Foks`

I guess this thing I did recently is an open astronomy thing :)https://git.pixie.town/f0x/earth-wallpaper-api

`Foks`

takes the latest Himawari-8 picture, and makes it into a nice wallpaper, which can then be set automagically from https://f.0x52.eu/earthwallpaper/himawari-8-quote.png or https://f.0x52.eu/earthwallpaper/himawari-8.png
`Foks`

> <@cadair:cadair.com> nice, you seen https://github.com/cameronleger/goes16-background ?

ooh nice

`Foks`

there's a Himawari-8 one as well I see now...