Psi4 Aurigae, Latinized from ψ4 Aurigae, is a single, orange-hued star in the northern constellation of Auriga. It is visible to the naked eye with an apparent visual magnitude of +5.02. With an annual parallax shift of 10.08 ± 0.33 mas, it is approximately 324 ly distant from Earth. This is a K-type giant star with a stellar classification of K5 III. It has expanded to 25 times the Sun's radius and is radiating 155 times the Sun's luminosity from its photosphere at an effective temperature of about 4,158 K. The atmosphere displays a significant enhancement of silicon. It was also known to be part of a much bigger constellation named Telescopium Herschelii before it was unrecognized by the International Astronomical Union (IAU).