54 Piscium is an orange dwarf star approximately 36 light-years away in the constellation of Pisces.

The effective temperature of the photosphere is about 5,297 K,[6] giving it the characteristic orange hue of a K-type star.

[7] The age of the star is about 6.4 billion years, based on chromospheric activity and isochronal analysis.

[5] There is some uncertainty in the scientific press concerning the higher ratio of elements heavier than hydrogen compared to those found in the Sun; what astronomers term the metallicity.

[8] When 54 Piscium B was directly imaged by NASA's Spitzer Space Telescope, it was shown that the brown dwarf had a projected separation of around 476 astronomical units from the primary star.

[15] 54 Piscium B was the first brown dwarf to be detected around a star with an already known extrasolar planet (based on radial velocity surveys).

The highly elliptical orbit suggested that the gravity of an unseen object farther away from the star was pulling the planet outward.