New bands observed between 460 and 560 nm following laser ablation of zirconium metal can be attributed to ZrO. A band system with origin near 513.3 nm is identified from dispersed fluorescence measurements as the predicted E-1 Pi-X-1 Sigma(+) system. Vibrational constants for the E state are omega(e) approximate to 852, omega(e)x(e) approximate to 1.5 cm(-1). Data on the C-1 Sigma(+) and e(3)Pi(1) states have been extended. (C) 2009 Elsevier B. V. All rights reserved.