Vigilance is an emotion?
Plutchik's model is certainly visually appealing; however, the two dimensions of the model have no neurological or biological basis.

The Atlas of Personality, Emotion and Behaviour (Mobbs, 2020) is an alternative with an established neurobiological basis.  The atlas catalogues over 3,000 emotions which include vigilance.  Alternative emotions would include: alertness, caution, diligence, attentiveness, observance, and watchfulness.

A visualisation of the atlas is shown below.



Mobbs AED (2020) An atlas of personality, emotion and behaviour. PLoS ONE 15(1): e0227877. https://doi.org/10.1371/journal.pone.0227877

Plutchik, R., &amp; Conte, H. R. (1997). Circumplex Models of Personality and Emotions. American Psychological Association.