Tags: Planet.
4034 Vishnu (provisional designation: 1986 PA) is an Apollo asteroid 0.4 kilometers in diameter. It completes one revolution around the Sun almost once every year. It was discovered by Eleanor F. Helin at the Palomar Observatory in San Diego County California on August 2 1986. It is an O-type asteroid meaning it is similar to the asteroid 3628 Boznemcová which is the best asteroid match to the spectra of L6 and LL6 ordinary chondrite meteorites.