The trio of Dutch and Dutch–American astronomers also collaborated on the productive Palomar–Leiden survey in the 1960s, using the same procedure as for this (smaller) survey: Tom Gehrels used Palomar's Samuel Oschin telescope (also known as the 48-inch Schmidt Telescope), and shipped the photographic plates to Cornelis and Ingrid van Houten at Leiden Observatory where astrometry was carried out.
[4] Glaukos has been characterized as a dark D-type asteroid by PanSTARRS' photometric survey as well as in the SDSS-based taxonomy.
In 2012 and 2013, three rotational lightcurves of Glaukos in the R- and S-band were obtained by astronomers at the Palomar Transient Factory in California.
[9][13] In October 2013, photometric observations by American astronomer Robert Stephens at the Center for Solar System Studies gave the so-far best rated lightcurve, with a period of 5.986±0.003 hours and a brightness variation of 0.42 magnitude (U=3).
[8][a] According to the survey carried out by NASA's Wide-field Infrared Survey Explorer with its subsequent NEOWISE mission, Glaukos measures 47.65 kilometers in diameter, and its surface has an albedo of 0.049,[7] while the Collaborative Asteroid Lightcurve Link assumes a standard albedo for a carbonaceous asteroid of 0.057 and calculates a diameter of 42.23 kilometers with an absolute magnitude of 10.6.