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ericagol

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NbodyGradient.jl
N-body integrator computes derivatives with respect to initial conditions for TTVs, RV, Photodynamics & more

Julia · 29 stars

Beginner friendly Everything

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Shared arrays issue Open

ericagol/NbodyGradient.jl#113 · 1 reaction · 1 assignee · Opened Mar 2, 2026
Improving computation effeciency of transit time finding Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

ericagol/NbodyGradient.jl#112 · Opened Feb 28, 2026
Quality-of-Life Improvements Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

ericagol/NbodyGradient.jl#111 · 2 comments · 1 reaction · Opened Nov 21, 2025
Fixing cartesian element output and test Open

ericagol/NbodyGradient.jl#110 · 2 assignees · Opened Aug 26, 2025
Plane-parallel orbits Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ericagol/NbodyGradient.jl#106 · Opened May 5, 2025
Integration with Octofitter and PlanetOrbits Open

ericagol/NbodyGradient.jl#103 · 3 comments · 1 reaction · 2 assignees · Opened Sep 23, 2024
NamedDims.jl Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#100 · 1 comment · 1 reaction · Opened Apr 30, 2024
`initialize!` should also update the time Open

Difficulty 2/5 1-3 hours Newbie friendliness 35/100

ericagol/NbodyGradient.jl#99 · 1 reaction · Opened Jul 27, 2023
Implement derivatives for circular orbits Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#98 · 1 reaction · Opened Jul 19, 2023
Support Unitful.jl/UnitfulAstro.jl? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#97 · 1 reaction · Opened May 1, 2023
Changing order of variables in initial conditions Open

ericagol/NbodyGradient.jl#91 · 2 assignees · Opened Oct 4, 2022
Problem if there are multiple transits in one timestep Open

ericagol/NbodyGradient.jl#90 · 1 comment · 2 assignees · Opened Sep 7, 2022
Order of indices in transit time computation Open

ericagol/NbodyGradient.jl#89 · 1 comment · 2 assignees · Opened Sep 3, 2022
Add type promotion Open

enhancement simplification

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ericagol/NbodyGradient.jl#88 · 1 reaction · Opened Sep 2, 2022
Change order of derivative arrays Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#86 · 1 comment · Opened Jun 24, 2022
Allow circular orbits in initial conditions Open

bug

ericagol/NbodyGradient.jl#83 · 1 comment · 1 assignee · Opened May 9, 2022
Rename `Derivatives` and export Open

enhancement

ericagol/NbodyGradient.jl#81 · 1 assignee · Opened Nov 20, 2021
Make some plotting tools Open

enhancement

ericagol/NbodyGradient.jl#80 · 2 comments · 1 assignee · Opened Nov 13, 2021
Output time step Open

ericagol/NbodyGradient.jl#75 · 1 assignee · Opened Jul 16, 2021
Speed up initial conditions Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ericagol/NbodyGradient.jl#74 · 1 reaction · Opened Jul 7, 2021
Create documentation. Open

enhancement

ericagol/NbodyGradient.jl#73 · 1 reaction · 1 assignee · Opened Jul 7, 2021
Missing physics Open

Difficulty 1/5 Under an hour Newbie friendliness 68/100

ericagol/NbodyGradient.jl#70 · Opened Jun 10, 2021
Speeding up kepler solver Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#67 · 2 comments · Opened May 26, 2021
Correction term with fast kicks Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ericagol/NbodyGradient.jl#66 · 4 comments · Opened May 25, 2021
Turning off 4th order corrector Open

ericagol/NbodyGradient.jl#65 · 2 assignees · Opened May 20, 2021
Simplifying c34 term Open

simplification

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

ericagol/NbodyGradient.jl#64 · Opened May 13, 2021
Factor out a squared term in this expression Open

simplification

Difficulty 1/5 Under an hour Newbie friendliness 55/100

ericagol/NbodyGradient.jl#63 · Opened May 12, 2021
Simplify expression in code Open

simplification

Difficulty 1/5 Under an hour Newbie friendliness 42/100

ericagol/NbodyGradient.jl#62 · Opened May 12, 2021
Simplify h derivative Open

simplification

Difficulty 1/5 Under an hour Newbie friendliness 45/100

ericagol/NbodyGradient.jl#61 · Opened May 12, 2021
energy and angular momentum conservation figures Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

ericagol/NbodyGradient.jl#56 · Opened Mar 20, 2021
Outer solar system initial conditions Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ericagol/NbodyGradient.jl#51 · 1 comment · Opened Mar 18, 2021
Efficient use of arrays Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

ericagol/NbodyGradient.jl#30 · 7 comments · Opened Feb 5, 2020
Change gradient of likelihood Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#29 · Opened Feb 4, 2020
Large time steps Open

Difficulty 4/5 3-5 days Newbie friendliness 30/100

ericagol/NbodyGradient.jl#28 · Opened Sep 19, 2019
Tracking transit times in higher precision Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#25 · Opened Aug 10, 2019
Scaling of coordinates with `h`. Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#24 · Opened Aug 10, 2019
Handedness of coordinate system and orientation Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#21 · Opened Aug 8, 2019
Error in criterion for a transit? Open

ericagol/NbodyGradient.jl#17 · 1 comment · 1 assignee · Opened Aug 3, 2019
Tolerance of transit time finding is fixed at double precision Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ericagol/NbodyGradient.jl#16 · 4 comments · Opened Aug 2, 2019
Use derivatives to compute planet-planet interactions Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

ericagol/NbodyGradient.jl#11 · Opened Jun 6, 2018
Sometimes NaNs give "Not elliptic or hyperbolic" error Open

bug

Difficulty 4/5 3-5 days Newbie friendliness 25/100

ericagol/NbodyGradient.jl#10 · Opened Mar 18, 2018
Limit number of iterations in ekepler Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

ericagol/NbodyGradient.jl#9 · 2 comments · Opened Mar 18, 2018
TTV computation comparisons Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

ericagol/NbodyGradient.jl#8 · 13 comments · Opened Feb 22, 2018
Bug when e=0 Open

bug

Difficulty 5/5 Over a week Newbie friendliness 20/100

ericagol/NbodyGradient.jl#6 · Opened Jan 18, 2018
Implement additional features Open

enhancement

ericagol/NbodyGradient.jl#4 · 1 assignee · Opened Dec 5, 2017
Implement photodynamics Open

enhancement

ericagol/NbodyGradient.jl#3 · 1 comment · 1 assignee · Opened Dec 5, 2017
Refactor code to allow Autodiff Open

enhancement

ericagol/NbodyGradient.jl#2 · 1 comment · 1 assignee · Opened Dec 5, 2017

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