The dark nebula Barnard 203 or Lynds 1448 is located about one degree southwest of NGC 1333 in the Perseus molecular cloud, at a distance of about 800 light-years.

[3] The source IRS 1 is a class I young stellar object and a binary.

The system has an hourglass shaped magnetic field that is aligned with the bipolar outflow.

[6] The source IRS 3B was studied the most and ALMA showed that it is a triple protostar system with one star forming via disk fragmentation.

IRS 3B is a class 0 young stellar object and might be younger than 150,000 years.