Asteroid 9998, ISO, was discovered on March 25, 1971 by C. J. van Houten and Ingrid van Houten-Groeneveld on photographic plates taken by Tom Gehrels at Palomar Mountain Observatory. It has a period of 3 years, 65 days and is slightly over 1 1/3 mile in diameter.
It was named for ISO, the Infrared Space Observatory, which was launched in 1995 to study the universe over a broad range of electromagnetic wavelengths. Its many discoveries are water vapor on Titan, infrared galaxies at vast distances, young stars in the Orion Association and the nature of the surface of major and minor planets.
Astrologically, asteroid ISO seems to be about the same, analogous, similar, equal (the literal meaning of "iso-" in Greek).