标题： 一颗年轻恒星 V2492 Cygni 亮度的新的长时间减少事件 显示英文标题

标题： A new prolonged decrease event in the brightness of the young stellar object V2492 Cygni

摘要： 呈现了从2018年4月至2020年9月对年轻恒星天体V2492 Cyg的BV(RI)c测光观测结果。这些观测是我们自2010年开始监测该恒星的一部分，并持续至今。V2492 Cyg位于鹈鹕星云中，其变异性被归因于吸积和消光事件。新的测光数据表明，该恒星在所有波段继续表现出快速的不规则变化。在2019年3月至2020年5月期间，我们记录到V2492 Cyg亮度曲线中的一次长时间下降事件。 显示英文摘要

摘要： Results from the BV(RI)c photometric observations of the young stellar object V2492 Cyg collected in the period from April 2018 to September 2020 are presented. These observations are a part of our monitoring of the star that began in 2010 and continuing to date. V2492 Cyg is located in the Pelican Nebula, and its variability was explained by both accretion and extinction events. The new photometric data show that the star continues to exhibit rapid irregular variability in all bands. In the period from March 2019 to May 2020, we registered a prolonged decrease event in the light curve of V2492 Cyg.