Editing Perth Observatory (section)

====Dr Iwan (Ivan) Nikoloff====
With the death of Harris on 23 December 1974, Nikoloff was to act in the role of [[Western Australian Government Astronomer|Government Astronomer]] of the Perth Observatory until 30 May 1979 when he officially became the fifth Government Astronomer of the Perth Observatory.

After arriving in Australia in 1964, he commenced at the Perth Observatory as an Astronomer Grade II on 1 May 1964 and worked on the Observatory's [[astrograph]]; his previous experience also saw him set up and calibrate the recently acquired Zeiss plate measuring machine. With the relocation of the Perth Observatory from Perth to Bickley, Nikoloff's surveying skills were extensively used in setting up the new Observatory during 1965.

Nikoloff worked with the German Hamburg Observatory [[meridian circle]] telescope expedition on the Perth 70 catalogue, from 1969 until 1971, before the expedition [[astronomer]]s returned to Germany that Christmas.

In 1971, with funding by the [[Government of Western Australia]] and negotiations for the loan of the Hamburg telescope, Nikoloff was placed in charge of the newly formed Perth Observatory Meridian Section. Dr Nikoloff commenced a new observing program of FK4 and FK4 Supplementary stars that would result in the Perth 75 catalogue of 2549 stars. The catalogue not only extended the well revered Perth 70 catalogue, but provided valuable [[Southern Hemisphere]] information for the construction of the new FK5 reference frame sought by the international astronomical community.

As Government Astronomer, Nikoloff passed on the Meridian Section to D. Harwood, but kept a keen involvement in the construction of the subsequent Perth 83 meridian catalogue. While daily administrative duties kept him busy, Nikoloff continued observing on all the Observatory's telescopes at night and on weekends.

Nikoloff maintained a good relationship with the [[University of Western Australia]], was a Foundation member and Fellow of the [[Astronomical Society of Australia]], a life member of the Astronomical Association of Western Australia and a member of the [[International Astronomical Union|IAU]]'s original Commission 8 (Astrometry) and I (Fundamental Astronomy); he also continued the Observatory's public information services and tours. He retired on 4 January 1985 and died on 8 April 2015.