Tested a smaller step -- values don't differ enough for me to use

cmd/designer/conf.toml

@@ -13,4 +13,4 @@ enabled = true
 directory = "../../cmd/refframes"
 horizonDir = "../../data/horizon" # Files *must* be named to answer to fmt.Sprintf("%s-%04d", planetName, year) // TODO: Switch to a month too
 horizonCSV = true # Set to False to compute each ephemeride separately
-truncation = "24h" # Set to a Duration that can be parsed. Correspond to the truncation to use.
+truncation = "1h" # Set to a Duration that can be parsed. Correspond to the truncation to use.

cmd/designer/finalprj-neptune-final.toml

@@ -2,14 +2,14 @@
 fileprefix = "prj-final"
 outputdir = "outputs"
 verbose = true
-step = "24h"
+step = "1h"
 flybyplanets = "Venus Earth Jupiter"
 
 [launch]
 planet = "Earth"
 from = 2461283.500
 until = 2461284.500
-resolution = 1
+resolution = 24
 maxC3 = 13
 
 [arrival]
@@ -36,7 +36,7 @@ resonance = 2 # TODO: Check with a 3:1 resonance
 
 [flyby.Jupiter]
 position = 3
-deltaV = 0.2
+deltaV = 0.3
 from = 2463434.443
 until = 2463435.443
 periapsis = 1.5