Telescopic comet PANSTARRS, Orimattila, Artjärvi, Viestikallio

364P/PanSTARRS is a small comet currently about 1 AU from the Sun and very close to Earth at 0.14AU / 21 million km. Because of its proximity, the comet moves very quickly and even with short 45s exposures you had to follow the comet. The comet has a dense very small 40" / 4,000 km diameter coma and an easily distinguishable narrow 8' / 50,000 km long tail.

The image of the cyan filter (CN 387nm) shows almost no CN emission with 364P/PanSTARRS. Often, comets have already formed a large CN coma at a distance of 1 AU from the sun, but this comet does not have it for some reason.

Image 1) Clear filter, 15x45s, 2023-04-01 23:11 UT

Image/animation 2) 15 frames a 45s, 2023-04-01 23:11 UT

Figure 3) Image of CN 387nm/15nm filter 6x180s, 2023-04-01 23:25 UT

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Telescopic comet PANSTARRS - 1.4.2023 at 02.00 - 1.4.2023 at 03.00 Orimattila, Artjärvi, Viestikallio Observation number 113995