It was discovered on 24 October 1976, by Richard Martin West at ESO's La Silla Observatory in northern Chile.
[1] Between 2001 and 2011, four rotational lightcurve of Tamriko were obtained from photometric observations by Edwin Sheridan, Pierre Antonini, Laurent Bernasconi and Brian Warner.
Lightcurve analysis gave a rotation period between 7.462 and 7.471 hours with a brightness variation between 0.11 and 0.15 magnitude (U=2/2/2/2).
[10][11][12][a] According to the surveys carried out by the Infrared Astronomical Satellite IRAS, the Japanese Akari satellite, and NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Tamriko measures between 26.799 and 30.45 kilometers in diameter and its surface has an albedo between 0.1225 and 0.158.
[5][6][7][8][9] The Collaborative Asteroid Lightcurve Link adopts the results obtained by IRAS, that is, a standard albedo of 0.1225 and a diameter of 30.45 kilometers with an absolute magnitude of 10.48.