Neuroscience is probably the only way to determine an “objective” measure of what emotions we have and how they related to one another. Unfortunately, there is still a lot of research to be done, so we are probably going to have to sit and wait until we can learn more about the emotional aspects of the human mind.
I find it bizarre that something as seemingly subjective as emotions could be classified but it turns out, quite a few smart people have given it much thought and made their attempts at it.
In this article, you’ll find a list, a pretty diagram, and what looks like an excel spreadsheet of emotions. Food for thought.
Read on! Classification of Emotions.