2015 TC25

 is a near-Earth asteroid, and at only 6 ft across and absolute magnitude 29.34 mag, it is thought to be the third smallest asteroid observed over multiple years, after with absolute magnitude 30.4 and  with absolute magnitude 29.5. The asteroid is notable for reflecting about 60% of the light that hits it, making it one of the brightest near-earth asteroids ever seen.

Discovered by the Catalina Sky Survey on 12 October 2015, it was observed with several ground-based telescopes. Radar observations were also made using the Arecibo Observatory as it passed 128,000 km from the Earth. Observations suggest its surface composition is similar to Aubrite meteorites, a rare class of high-albedo differentiated meteorites.

The albedo and radar polarization ratio suggest belongs to the E-type asteroids, and comparison of its spectral and dynamical properties suggest it may have broke off of the 70-kilometer diameter E-type asteroid 44 Nysa. is also notable for its rather short rotation period of only about 2 minutes, which, combined with its low surface gravity makes it very difficult for to retain a regolith layer. Its surface therefore most likely resembles a bare rock.