Asteroid 90138, Diehl, was discovered on December 25, 2002 by Berton L. Stevens at Desert Moon Observatory in Las Cruces, New Mexico. It has a period of 3 years, 172 days.
It was named for journalist, amateur astronomer and astronomy promoter Jacqueline Diehl (born 1963). She was the first chair of the White Sands Star Party, promoted astronomy through the Alamogordo (New Mexico) Astronomy Club. managed Space Camp at the New Mexico Museum of Space History in Alamogordo and has been education and public outreach coordinator at the National Solar Observatory in Sunspot, New Mexico.
Astrologically, asteroid Diehl seems to indicate making deals, having to "deal"; possibly also, popularization of astronomy.