参考资料

KIC 9832227 is a contact binary star system in the constellation Cygnus, located about 2,060 light-years away. It is also identified as an eclipsing binary with an orbital period of almost 11 hours. [4] Incorrect 2022 merger prediction. A light curve for KIC 9832227, plotted from TESS data [6]

KIC 9832227 is a contact binary whose 11 hr orbital period is rapidly changing. Based on the apparent exponential decay of its period, the two stars were predicted to merge in early 2022 resulting in a rare red nova outburst. Fortunately KIC 832227 was observed in 2003 as part of the NASA Ames pre-Kepler Vulcan Project to search for transiting exoplanets. We find that the Vulcan timing ...

The median random uncertainty on individual measurements of KIC 9832227 was 5 mmag for data taken in New Mexico and 7 mmag for data taken in Grand Rapids. The reference stars used were KIC 9771791, KIC 9832338, KIC 9832411, and GSC 03543:01558. The aperture had a radius of 5 pixels, the gap a width of 2 pixels, and the sky annulus a width of 3 ...