[3] The telescope is situated at the south end on top of the Ångström laboratory, the main physics building of Uppsala University.

The building stands on a gravel slope, which is a part of Uppsala esker, next to the Fyris river with a main road just to the south.

However, the main observational season from late August to end of April generally has less than 25% clear nights, November being worst and March best.

The lower part of the dome have 15 side doors of which 12 are opened in pairs, and a large window to the upper control room, half a floor down.

Originally there were two control rooms, one next to the dome with the viewing window of the telescope, and one down in the observatory's office space.

The telescope is a 0.9 meter classical Cassegrain but with a third rotatable plane mirror sending light to one of the two Nasmyth foci.

In 2000 when the Ångström building was enlarged in order to accommodate most of the physics related institutions at Uppsala University, the lower part of the telescope dome, holding side doors, were built.

During the summer, the rotatable top part of the dome from Ash-Dome, was assembled on ground and lifted up (8 June[5]) by crane.

During the summer a computer controlled dome rotation and opening system was installed as a part of an exam project by Pär Hedblom.

[8] Later, in the autumn, a dome flat field system was installed as a part of an exam project by Tobias Jansson.

In the summer of 2005, Johan Warell and Ola Karlsson constructed a day time observing system[10] consisting of a sub aperture mask in front of the telescope and a covering fabric shielding the optics from stray light by about 10 magnitudes, supplying twilight like conditions.

In January 2008 a control relay for the lower dome hatch started to fail shutting off once activated, and was replaced.

From 2008 to 2013, Kjell Lundgen and Ola Karlsson gradually investigated and improved the telescope's flat field in order to achieve a derotator independent correct optical system.

A well known problem with one of the telescope's derotators casing error messages and shifted values was eventually dealt with in February 2009.

The ejection function of the instrument computer's DVD burner unit for the CD archive stopped working in May.