SDSS photometry in the field of L1457

High-quality coude feed spectra, together with five-band photometry in the Sloan Digital Sky Survey system and near-infrared archival data from the Two Micron All Sky Survey, are used to derive color excesses and distances for the stars. Based on these data, a new distance estimate of 360+/-30pc is derived for the cloud, supporting recent results by K.L. Luhman, 2001ApJ...560..287L.

The data further indicate that the north-south velocity gradient seen in the millimeter-wave CO data is mirrored in a distance gradient, with the northern part of the cloud being closer to us. A second, less opaque, layer of extinction is detected at ~80pc. This distance is consistent with the earlier distance estimates to the cloud, based on Na I absorption.