773 Irmintraud

The rare spectral T-type is similar to D-types which are often found among Jupiter trojans thought to have originated from the Kuiper belt.

[12] In 1992, Larry Lebofsky and colleagues published an article in which they noted that "unaltered asteroids are thought to represent the raw materials available for terrestrial planet formation and so are important to our understanding of the origin and evolution of the Solar System.

[13] In 1997, NASA added 773 Irmintraud and eventually over one million other names to a microchip placed on board the Stardust spacecraft that launched February 7, 1999.

Moreover, even though 368 Haidea was closest spectrally to the Tagish Lake meteorite, 773 Irmintraud was no more than 0.034 AU to a chaotic zone associated with one of the Kirkwood gaps due to the mean motion resonance with Jupiter.

[15] In addition, the University obtained an accurate lightcurve in Japan through visible photometry and ultimately found a gap between K- and L-band spectra.