Bonnard John Teegarden (born August 23, 1940)[1] is an American astrophysicist formerly with NASA's Goddard Space Flight Center, now retired.

He spent most of his career studying cosmic gamma rays and is best known to the public for leading the team that discovered Teegarden's star in 2003.

Teegarden's team found this star in data taken years earlier by an unrelated program searching for near-Earth asteroids.

The accepted distance is now more than twelve light-years and public interest has faded somewhat, but not before Teegarden was rewarded with the name of this newly discovered star, although other designations are sometimes used as well.

[8] Teegarden was a cosmic ray researcher at NASA's Goddard Space Flight Center for all of his professional life.