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This is the home of the PSR – Planetary System Research group at the Department of Physics, University of Helsinki

The group leader is Prof. Karri Muinonen Karri.Muinonen( a t )

Researchers affiliated with PSR are Doc. Jouni Peltoniemi, Dr. Evgenij Zubko, Dr. Mikael Granvik, Dr. Maria Gritsevich, Dr. Tomas Kohout, Dr. Jani Tyynelä, Dr. Antti Penttilä, Dr. Dagmara Oszkiewicz, Dr. Johannes Markkanen, Dr. Hannakaisa Lindqvist, Dr. Anne Virkki, Dr. Olli Wilkman, Grigori Fedorets (M.Sc.), Otto Solin (M.Sc.), Julia Martikainen (M.Sc.), Joonas Herranen (M.Sc.), and Timo Väisänen (M.Sc.).


in Univ. Helsinki that are either given by us or related to our studies.


in our group that have home pages or publications listed in Uni Helsinki research database

Data collections and computer codes

hosted by PSR Helsinki group

  • SIRIS, package for generation of sample Gaussian spheres and for the computation of light scattering by Gaussian particles and arbitrary polyhedral particles in the ray optics approximation
  • SIRIS version 4.2 for core-mantle geometry and inhomogenous waves in absorbing media
  • FaSTMM, a fast superposition T-matrix method code for exact scattering properties of a collection of spherical particles
  • Numerical scattering law for solar system bodies
  • Computer codes for H,G1,G2 and H,G12 photometric systems
  • AAMS database of asteroid photometric parameters, i.e. absolute magnitudes and phase curve slope parameters
  • Asteroid Photometric Catalogue for asteroid lightcurves and asteroid phase curve analyzer (DECOMMISSIONED IN MARCH 2017)


organized by us


where PSR is contributing

  • European Research Council Advanced Grant project SAEMPL, lead by prof. Karri Muinonen, 2013–2018
  • Academy of Finland project Electromagnetic Wave Scattering by Complex Random Media, lead by prof. Karri Muinonen, 2012–2016

PSR-member, see internal group space for our group meetings and shared documents. Other restricted-access pages include internal SAEMPL project page and ACM-2014 LOC page.



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