begin{table}[!ht]
begin{center}
    caption{Actors vs Positional Dynamicity (based on Closeness Centrality) in Different LSNs} label{pos1}
    begin{tabular}{|c||c| c| c| c| c|}
        hline

        Actor No. & LSN 1 & LSN 2 & LSN 3 & ...  & LSN 60   \ [0.5ex]
        hlinehline
        1 &0.205602  &0.262515  & 0.247979  &... & 0.170467  \
        hline
        2 &0.00961852  &0.0200901  & 0.0207746  &... & 0.107013 \
        hline
        3 &0.1271  & 0.170967 &  0.199928  &... &0.173208  \
        hline
        4 & 0.00263733 & 0.00524802 & 0.00787202  &... &0.0100803  \
        hline
        5 & 0.00300429 &0.00597824  &  0.00673418  &... & 0.00706005 \
        hline
        ... & ... & ... & ...   &...  .  &...    \
        hline
        1899 &0.00994494  &0.00968842  & 0.0216411   &...&0.0610909  \
        hline
    end{tabular}
end{center}
end{table}

documentclass[twocolumn]{IEEEtran}
usepackage{lipsum,booktabs,siunitx}
newcolumntype{T}[1]{S[table-format=#1,group-digits=false]}
begin{document}
lipsum[2] % filler text

begin{table}[!ht]
% let LaTeX figure out optimal amount of intercolumn whitespace:
setlengthtabcolsep{0pt}
caption{Actors vs. Positional Dynamicity (based on
Closeness Centrality) in Different LSNs} label{pos1}
begin{tabular*}{columnwidth}{@{extracolsep{fill}}c*{3}{T{1.8}}cT{1.8}}
toprule
Actor No. & {LSN 1} & {LSN 2} & {LSN 3}   & $cdots$ & {LSN 60} \
midrule
1 &0.205602    &0.262515    & 0.247979    & $cdots$ & 0.170467  \
2 &0.00961852  &0.0200901   & 0.0207746   & $cdots$ & 0.107013  \
3 &0.1271      & 0.170967   &  0.199928   & $cdots$ & 0.173208  \
4 & 0.00263733 & 0.00524802 & 0.00787202  & $cdots$ & 0.0100803 \
5 & 0.00300429 &0.00597824  &  0.00673418 & $cdots$ & 0.00706005\
$cdots$ & $cdots$ & $cdots$ & $cdots$ & $cdots$ & $cdots$  \
1899&0.00994494 &0.00968842 & 0.0216411   & $cdots$ & 0.0610909 \
bottomrule
end{tabular*}
end{table}
lipsum[2-10] % more filler text
end{document}