NGC 2281 is a young open star cluster nestled in the Northern constellation of Auriga. This cluster was first documented by William Herschel in 1788. With its intriguing characteristics and proximity, NGC 2281 has become a point of interest for astronomers seeking to study stellar evolution and cluster dynamics.
In a recent study submitted on 5 May 2023, Fritzewski et al (2023) focused on the rotational properties of cool star members within NGC 2281. Utilizing data from an eight-month photometric time series obtained at the 1.2 m robotic STELLA telescope in Tenerife, rotational periods for 126 low-mass members were meticulously measured. This extensive dataset enabled the construction of a detailed color-period diagram, revealing an evolved fast rotator sequence and providing a precise age estimate of 435±50 million years for NGC 2281.
To explore the nuances of NGC 2281, I collected a series of 15 images using the PROMT-USASK telescope and the B, V, and R filters, totaling exposure durations of 70s, 50s, and 30s. Leveraging Skynet’s capabilities, images were processed using Afterglow and Cluster Astromancer software. By analyzing the cluster’s photometric data and using parallax measurements from Gaia, I was able to determine the approximate distance to NGC 2281 from Earth is around 1800 light-years. When fitting the photometric data to the isochrone model within Astromancer, I was able to uncover clues about the clusters elemental composition and metallicity.
The exploration of NGC 2281 through data collection and analysis was motivated by a desire to learn more about the cluster’s evolutionary history. By delving into key aspects such as distance, proper motion, stellar populations, and chemical composition, the study aimed to contribute to our understanding of open clusters and their role in galactic evolution. Through my observation and analysis, I discovered the presence of evolved giants, showcasing the diverse range of stellar evolutionary stages within NGC 2281. These giant stars contribute to the cluster’s overall luminosity and serve as probes for understanding stellar evolution timescales.
NGC 2281 was previously studied by John W. Glaspey in 1987 who provided initial parameters and insights into the cluster’s properties. Building on their work, the study integrated Gaia data with these parameters, refining distance estimates, and proper motion measurements.
In conclusion, the NGC 2281 cluster project represents a culmination of my journey in astronomy, offering profound insights into stellar dynamics, evolution, and cluster formation processes. This project has been a fulfilling experience, marking a significant milestone in my studies of the cosmos and sparking a deeper curiosity for exploring more galactic mysteries.