TESS Sector 21 Calibrated FFI - Camera 3 CCD 4

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 pipelin

任务目标 - 过渡系外行星巡天卫星（TESS）是一项由美国国家航空航天局（NASA）资助的天体物理学探测级任务，旨在进行近乎全天空的巡天，以寻找穿越邻近恒星的行星。TESS的主要目标在于发现比海王星更小的行星，这些行星穿越的恒星亮度足以进行后续的光谱观测，从而提供行星质量和大气成分。概览 - TESS于2018年4月18日发射，经过一系列机动后，被置于一个高度椭圆的13.7天地球轨道上。TESS于2018年7月25日开始常规科学运行。在为期两年的主任务期间，TESS使用四台宽场光学CCD相机监控超过20万颗主序矮星，以检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