TESS Sector 20 Calibrated FFI - Camera 4 CCD 2

Mission objectives The Transiting Exoplanet Survey Satellite (TESS) is a NASA-sponsored Astrophysics Explorer-class mission that is performing a near all-sky survey to search for planets transiting nearby stars. The primary goal of TESS is to discover planets smaller than Neptune that transit stars bright enough to enable follow-up spectroscopic observations that can provide planet masses and atmospheric compositions. Overview TESS launched on April 18, 2018 and after a series of maneuvers was placed in a highly-elliptical 13.7 day orbit around the Earth. TESS began regular science operations on July 25, 2018. In the 2-year prime mission, TESS monitors over 200,000 main-sequence dwarf stars with four wide-field optical CCD cameras to detect periodic drops in brightness caused by planetary transits. TESS obtains full-frame images (FFIs) of the entire, four camera field-of-view (24 x 96 degrees) at a cadence of 30 minutes to facilitate additional science. TESS data processing pipeline Th

任务目标：天文学家观测卫星（Transiting Exoplanet Survey Satellite，简称TESS）是一项由美国宇航局资助的天体物理学探索级任务，其主要目标是执行近全天空的巡天观测，以寻找附近恒星系统中正在穿越的行星。TESS的主要目的是发现海王星体积更小的行星，这些行星穿越的恒星亮度适中，足以进行后续的光谱观测，从而获得行星的质量和大气成分。概览：TESS于2018年4月18日发射升空，经过一系列机动操作后，被置于地球附近的13.7天椭圆轨道上。TESS于2018年7月25日开始进行常规科学观测。在为期两年的主观测任务中，TESS利用四台宽场光学CCD相机对超过20万颗主序矮星进行监测，以探测由行星穿越造成的亮度周期性下降。TESS以30分钟的频率获取整个四台相机视场（24 x 96度）的全帧图像（FFIs），以促进额外的科学研究。TESS数据处理流程