Open clusters are ideal observational testbeds for understanding the dynamics of stellar systems. We present a dynamical study of the young open cluster NGC 2302. The latest Gaia data and UBV IJHKs photometric data are used in this study. A total of 117 stars are selected as genuine members using the Gaia data. This cluster is, on average, reddened by ⟨E(B − V )⟩ = 0.24 ± 0.06 (s.d.). The ratio of total-to-selective extinction (RV ) in the direction of NGC 2302 is 2.8±0.1. The cluster distance is determined to be 1.16 ± 0.08 kpc using Gaia parallaxes. Theoretical isochrone fitting for Z = 0.008 on color-magnitude diagrams yields an age of 80 ± 20 Myr. The relative proper motions of individual members show no significant radial expansion or contraction. NGC 2302 contains a total stellar mass of 333±48M⊙. The one-dimensional velocity dispersion is approximately 0.26 kms−1, which is comparable to the virial velocity dispersion of 0.27 kms−1 derived from its total mass. Its relaxation time is estimated to be approximately 92 Myr, which is similar to the age of the cluster within the uncertainty in age estimation. Finally, we report a pattern of mass segregation in the radial distribution of stellar masses. Our results suggest that NGC 2302 is virialized and currently approaching a state of dynamical relaxation. However, because no definitive evidence of kinetic energy equipartition is found, the possibility of in-situ formation of high-mass stars within the central region should be carefully considered.

Introduction
Data
    Imaging Observations
    Catalogs
Member Selection
Fundamental Parameters
    Structure
    Reddening and Reddening Law
    Distance, Age, and Total Mass
Kinematics
Dynamical State
Summary
Acknowledgments
References
Gaia Extinction Law

• Jongsuk Hong(Korea Astronomy and Space Science Institute, Daejeon 34055, Republic of Korea)
• Yuna Lee(Department of Earth Sciences Education, Kongju National University, Gongju-si, Chungcheongnam-do 32588, Republic of Korea)
• Beomdu Lim(Department of Earth Sciences Education, Kongju National University, Gongju-si, Chungcheongnam-do 32588, Republic of Korea) Corresponding author