Here is a version of JPLEPH containing the DE430 data, compiled for machines based on Intel processors: Here is an older version containing the DE405 data: Put it in: $GOPATH/src/github.com/pebbe/novas/jpleph/

You can put the file in a different location. Then you need to provide the full path at run time in the environment variable JPLEPH, or you can set the full path at build time of the program that imports the package, like this: 

    go build -ldflags "-X github.com/pebbe/novas.JPLephFile=/opt/opt_local/novas/JPLEPH" program.go
To see if this file is suitable for your system, run: 
    go test github.com/pebbe/novas
If you need another version, you can build it yourself:

  1. Download all files from ftp://ssd.jpl.nasa.gov/pub/eph/planets/fortran/
  2. Follow the instructions in the userguide.txt