four telescopes is estimated at a total cost of US$100 million for the entire array. As of mid-2014, Pan-STARRS 2 was in the process of being commissioned. In the wake of substantial funding problems, no clear timeline existed for additional telescopes beyond the second. In March 2018, Pan-STARRS 2 was credited by the Minor Planet Center for the discovery of the potentially hazardous Apollo asteroid , its first minor-planet discovery made at Haleakala on 13 May 2015. Instruments Pan-STARRS currently (2018) consists of two 1.8-m Ritchey–Chrétien telescopes located at Haleakala in Hawaii. The initial telescope, PS1, saw first light using a low-resolution camera in June 2006. The telescope has a 3° field of view, which is extremely large for telescopes of this size, and is equipped with what was the largest digital camera ever built, recording almost 1.4 billion pixels per image. The focal plane has 60 separately mounted close packed CCDs arranged in an 8 × 8 array. The corner positions are not populated, as the optics do not illuminate the corners. Each CCD device, called an Orthogonal Transfer Array (OTA), has 4800 × 4800 pixels, separated into 64 cells, each of 600 × 600 pixels. This gigapixel camera or 'GPC' saw first light on 22 August 2007, imaging the Andromeda Galaxy. After initial technical difficulties that were later mostly solved, PS1 began full operation on 13 May 2010. Nick Kaiser, principal investigator of the Pan-STARRS project, summed it up, saying, "PS1 has been taking science-quality data for six months, but now we are doing it dusk-to-dawn every night." The PS1 images, however, remain slightly less sharp than initially planned, which significantly affects some scientific uses of the data. Each image requires about 2 gigabytes of storage and exposure times will be 30 to 60 seconds (enough to record objects down to apparent magnitude 22), with an additional minute or so used for computer processing. Since images are taken on a continuous basis, about 10 terabytes of data are acquired by PS1 every night. Comparing against a database of known unvarying objects compiled from earlier observations will yield objects of interest: anything that has changed brightness and/or position for any reason. As of June 30, 2010, University of Hawaii in Honolulu received an $8.4 million contract modification under the PanSTARRS multi-year program to develop and deploy a telescope data management system for the project. The very large field of