Image Details
Caption: Figure 1.
ZTF nightly stacks for C/2019 Y4-A on 2020 October 14 (panel (a)) and 15 (panel (b)). Also shown are 3σ uncertainty ellipses for fragment A calculated using JPL orbit solution #7. Each image is ﹩{5}^{{\prime} }\times {5}^{{\prime} }﹩ in size with up points to celestial north. The white rectangles are masked stars and subtraction residuals.
© 2026. The Author(s). Published by the American Astronomical Society.