have shown that the main body of the galaxy rotates around minor axis whereas the matter of twined arm moves around the major axis of the galaxy as in classic PRGs (Reshetnikov & Yakovleva 1990).

### Photometric characteristics

Global photometric parameters of NGC 3808B are summarized in Table 2 (the value of $B_{t}$ in the table was derived from our $V_{t}$ magnitude and colour index from Gavazzi et al. (1991): $B-V\,=\,$+0.65).

[lll]{}\
\
\
& NGC 3808B & NGC 6286\
\
\
D (Mpc) \[RC\] & 93.0 & 76.5\
$A_{g}(B)$ \[RC3\] & 0.00 & 0.02\
$B_{t}\,\, (\pm\,0.10)$& 15.04 & 14.2\
$(B-V)_{t}$ & $\rm +0.65^{[1]}$ & $\rm +0.75\,\pm\,0.05$\
$(V-R)_{t}$& $\rm +0.48\,\pm\,0.03$& $\rm +0.50\,\pm\,0.03$\
$(R-I)_{t}$& $\rm +0.46\,\pm\,0.03$\
$ a\,\,(\mu_{B}=\rm 26)$ & 0.77’ (20.7 kpc) & 1.68’ (37.5 kpc)\
$ b/a\,\,(\mu_{B}=\rm 26$)& 0.36: & 0.36:\
\
$\mu_{0}$ & 18.5($V$) & 20.4 ($ B)^{\rm [2]}$\
$h$ & 3.9“ (1.8 kpc)& 6.6” $\rm (2.5\,\,kpc)^{[2]}$\
$z_{0}$ & 2.2“ $\rm (1.0\,\,kpc)^{[3]}$& 3.8” $\rm (1.4\,\,kpc)^{[3]}$\
$\rm V_{max}$ (km/s) & 120$\pm$10\
\
$Possible\,\,forming\,\,ring:$\
$\rm M $ & -18($V$) & -18.4($B$)\
$ B-V $ & & +0.5:\
$ V-R $ & +0.4: & +0.3:\
$ R-I $ & +0.4: &\
$\rm V_{max} (km/s) $& 120 & 100:\
Ring-to-central galaxy\
ratio 