Quick Question - Is this exposure time too much?

Hi all,

I just realized that my histogram for my sub-exposures were a bit too far to the right. I've been told by many sources that it should be closer to the left side of the histogram.

Will having it too far to the right have any adverse effects? I didn't "notice" any in my recent image, but I wanted to ask to see if I should lower my exposure time for the next session. I shot 3 min exposures for my recent image.