LBN653/HBC334/RN06 is a Young Stellar Object @ RA 02h30m Dec 55d23m : "Young Stellar Objects (YSOs) are stars in the first phase of theirs lives, before they enter the main sequence of the Hertzsprung-Russell diagram and are fed by stably hydrogen fusion. YSOs are formed by contraction (and fragmentation) of molecular clouds. Contraction can be started by a variety of factors, such as general density fluctuations in the interstellar medium, radiation pressure of nearby stars, or shock waves of supernova events that lead to local compressions. The contraction of the molecular cloud is driven by gravity, the cloud actually collapses in free falling. The gravitational energy is released by radiation and in turn influences the collapse by its radiation pressure, which counteracts gravity. The dense center of the molecular cloud is the new protostar. A protostar emits light due to the heat released by the gravitational collapse. Its core temperature, however, is still too low to maintain nuclear fusion. In this protostar stage, the star is still growing by mass accretion from the surrounding molecular cloud, which lasts until either the entire cloud is incorporated or until the radiation pressure of the new star is powerful enough to blow off the remainders of the cloud. "
Source: Reiner Vogel :
http://www.reinervogel.net/index_e.html?/YSO/YSO_e.html
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