Vilnius Photometry and Gaia Astrometry of Melotte 105
Timothy Banks, Talar Yontan, Selcuk Bilir, Remziye Canbay

TL;DR
This study combines Vilnius photometry and Gaia DR2 data to analyze the properties, structure, and kinematics of the heavily reddened star cluster Melotte 105, providing updated estimates of its parameters and orbit.
Contribution
It offers new photometric and astrometric data, resolves previous discrepancies in cluster parameters, and estimates the cluster's metallicity, age, and orbital characteristics.
Findings
Reddening E(B-V) = 0.34 mag from Vilnius photometry.
Distance modulus of 12.85 mag from ZAMS fitting.
Cluster age estimated at 240 +/- 25 Myr.
Abstract
Archival Vilnius CCD photometric observations are presented for the heavily reddened star cluster Melotte 105, resulting in colour-magnitude diagrams and spectral class estimates. There is considerable lack of agreement between studies for reddening, age, and distance for this cluster explaining why the archival data are being made available by this paper. The derived reddening E(B-V =0.34 +/- 0.04 mag and the distance V-M =12.9 +/- 0.3 mag directly from the Vilnius photometry. The Gaia Data Release 2 (DR2) and Vilnius photometric data of the cluster were used to estimate the structural parameters of the cluster, probability of stellar membership in the cluster, the distance modulus and the cluster age. Lack of band observations prevented determination of metal abundance. The values of the colour excess and distance module are determined by two different methods (i.e., Q and Zero…
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