It was discovered on 2 March 1992, by Japanese amateur astronomers Tetsuya Fujii and Kazuro Watanabe at the Kitami Observatory in eastern Hokkaidō, Japan.

[1] The first precovery was obtained at Goethe Link Observatory in 1950, extending the asteroid's observation arc by 42 years prior to its discovery.

[2] This minor planet was named in honor of Japanese astronomer Tomohiko Sekiguch (born 1970), associate professor at Hokkaido University.

[12] In October 2005, a rotational lightcurve of Sekiguchi was obtained from photometric observations by French amateur astronomers René Roy and Laurent Bernasconi.

[10] In October 2010 and November 2011, two more lightcurves were obtained at the Palomar Transient Factory, rendering a period of 5.4048 and 5.4100 hours with an amplitude of 0.58 and 0.27 magnitude, respectively (U=2/2).