Parameter Determination for Old Open Cluster NGC 188


  • Abigail Bohl Winsor School
  • Mark Brooks Hedstrom Mentor, The Winsor School



Stars, Space, Star Cluster, Open Cluster, Metallicity, Age, Distance, Mass


NGC 188, one of the oldest open clusters in the Milky Way, provides a unique insight into the history of the universe. NGC 188 has been historically used as a reliable test subject for various methods of determining data about star clusters. Because of its importance in the field of astronomical study and due to its unique age, this paper serves to independently verify the data found by previous research and to determine the age, metallicity, distance, and mass of open cluster NGC 188. Methods involved color magnitude diagram creation, isochrone fitting, and mass determination using the virial theorem. This research verifies that NGC 188 has an age of 6 billion years, a metallicity of 0.2 [Fe/H], a distance of 1348 parsecs, and a mass of 1392 solar masses.


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Author Biography

Mark Brooks Hedstrom, Mentor, The Winsor School

Physics and Astronomy Teacher

References or Bibliography

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How to Cite

Bohl, A., & Brooks Hedstrom, M. (2021). Parameter Determination for Old Open Cluster NGC 188. Journal of Student Research, 10(4).



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