We have mapped 17 deg2 region toward Galactic anticenter in 12CO J = 1 - 0 using the 3 mm SIS receiver on the 14 m telescope at Taeduk Radio Astronomy Observatory (TRAO). The region mapped in this paper is the first target of the Galactic AntiCenter CO Survey Project (GACCOS) and was selected comparing with IRAS Sky Survey Atlas (ISSA) images at 100 μm. Molecular emission of the target area is found to be very extended and is well matching with the FIR emission boundary. There are several pieces of clouds, and as some of spectra show several peaks, there seem to be several clouds overlapped in some directions. The Velocity of Local Standard of Rest (VLSR) of the CO emission of the mapped region ranges from -20 to +10 km/s. It is also found that the two cloudlets located around I = 180° have VLSR = -20 km/s, which is very abnormal. The peak antenna temperature of 13 K arises near the H II Region S241.

• S. T. HAN(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• J. S. KIM(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• B. G. KIM(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• H. G. KIM(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• H. R. KIM(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• Y. S. PARK(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• H. S. CHUNG(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• J. H. JUNG(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)
• Y. LEE(Korea Astronomy Observatory, Taeduk Radio Astronomy Observatory)