Galactic open clusters NGC 1907 and NGC 1912 are known as a binary cluster candidate by Subramaniam et al.(1995). With the SNUO 0.6m telescope, UBV CCD photometric observations were performed for 62 stars in NGC 1907 within the area of 8'x8' and 203 stars in NGC 1912 within the area of 15'x15' area. We obtained C-M and C-C diagrams. Their mean reddenings are E(B-V)=0.50 +-0.03 for NGC 1907 and 0.27 +-0.03 for NGC 1912. The distance moduli are estimated as 10.9 +-0.15 and 10.4 +-0.10 for NGC 1907 and NGC 1912, respectively. The ages for these clusters are 400 +-50 Myr for NGC 1907 and 150 +-30 Myr for NGC 1912. The distance difference of the two clusters is 300pc and the age difference is 150 Myr. These results imply that the two clusters are not physically connected.
Publication of Korean Astronomical Society
- Pub Date:
- December 1996