Get coordinates of a satellite from http request

All right I've got a fix for the code. If you want to try it out, go to the
.node-red/node_modules/node-red-contrib-satellites
folder and edit satellites.js
go to line 76 which is var satellites = []; and add the following

        // override tle1 if passed suitable value
            if  ('satid' in msg)  {
                if ( (typeof msg.satid === 'string') && (msg.satid.length < 1024) ) {
                    node.satid = msg.satid
                }
            }
        // override tle1 if passed suitable value
            if  ('tle1' in msg)  {
                if ( (typeof msg.tle1 === 'string') && (msg.tle1.length < 1024) ) {
                    node.tle1 = msg.tle1
                }
            }
        // override tle1 if passed suitable value
            if  ('tle2' in msg)  {
                if ( (typeof msg.tle2 === 'string') && (msg.tle2.length < 1024) ) {
                    node.tle2 = msg.tle2
                }
            }

Save the file and stop/start NR then try the second flow (using msg.tle1/2) that @afelix provided.

Let me know if it works for you.