LDN 183 and LDN 169 Vilnius photometry

The study is based on photometric classification in spectral and luminosity classes of 782 stars selected from the catalogs of 1299 stars down to V=20mag observed in the Vilnius seven-color system. For control, the MK types for 18 brightest stars with V between 8.5 and 12.8mag were determined spectroscopically.

For 14 stars, located closer than 200pc, distances were calculated from trigonometric parallaxes taken from the Gaia Data Release 1. For about 70% of the observed stars, two-dimensional spectral types, interstellar extinctions Av and distances were determined. Using 57 stars closer than 200pc we estimate that the front edge of the clouds begins at 105+/-8pc.