ASTERIA was a 6U CubeSat built by NASA JPL that operated from November 2017 through December 2019. ASTERIA's payload was a 6 cm optical telescope which demonstrated high precision photometry via two-stage precision pointing control.
Publications
Demonstrating High-precision Photometry with a CubeSat: ASTERIA Observations of 55 Cancri e
Mary Knapp, Sara Seager, Brice-Olivier Demory, Akshata Krishnamurthy, Matthew W. Smith, Christopher M. Pong, Vanessa P. Bailey, Amanda Donner, Peter Di Pasquale, Brian Campuzano, Colin Smith, Jason Luu, Alessandra Babuscia, Robert L. Bocchino Jr., Jessica Loveland, Cody Colley, Tobias Gedenk, Tejas Kulkarni, Kyle Hughes, Mary White, Joel Krajewski, Lorraine Fesq
The Astronomical Journal, vol. 160(1), 2020, p. 23