Not sure if it's been taken into account by previous answers, but I don't think 6km around a point at 50 degrees north is a constant radius when expressed in degrees.
Circles of latitude get smaller with increasing distance from the equator, so the latitude component will be larger than the longitude.
Not sure if it's been taken into account by previous answers, but I don't think 6km around a point at 50 degrees north is a constant radius when expressed in degrees.
Circles of latitude get smaller with increasing distance from the equator, so the latitude component will be larger than the longitude.