Abstract
The near-infrared variable source, IRAS 04000+5052, was observed using the Italian 1.5 m TIRGO infrared telescope, located in the Gornergrat Observatory, Switzerland. High-resolution images were obtained in the JHK broad bands and H 2 S(1) 1-0, Br γ narrow bands. Photometry and astrometry were also carried out. From the observations, it is found that IRAS source is not a single young object, but a small-sized, compact star-forming region with many young objects. Even in such a small and compact region, stars are not formed at the same time.
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