Fig. 3
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Optical spectrum of C/2023 H2 acquired on November 16, 2023, using the INT-IDS. Vertical lines indicate the detected emission features of OH (dashed purple), NH (dashed grey), CN (solid green), C3 (dashed yellow), CH (dashed blue), C2 (solid red), NH2 (dashed grey), and [OI] (dotted purple). Tentatively detected emissions of CO+ are indicated by dotted pink lines.
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