Distance Estimation of Bok globule CB69

Determining the distance of small, opaque dark clouds is particularly challenging due to their compact size. In this research, we have employed the near-infrared (NIR) photometric technique to compute the distance of Bok globule CB69. This method involves estimating the extinction (Av) of field stars using NIR data taken from the 2MASS catalogue, in conjunction with distance data obtained from Gaia. From the extinction (Av) versus distance (d) plot, the stars that exhibit an unexpected rise in extinction are considered the distance of the cloud. Consequently, we have estimated the distance to this CB69 cloud, as approximately 461+4 parsecs, respectively. This value aligns with previously published literature.