One Month of Near-IR Imaging Photometry of Comet 9P/Tempel 1
2009
We performed a month-long near-IR photometric and imaging observations of comet 9P/Tempel 1 in South Africa IRSF/SIRIUS. Our monitoring of comet brightness shows that a sustained comet activity and outbursts were not triggered by the impact. No color change was observed within 3$σ$ 12 hours after the impact. This suggests the color change found by other IR observations by the impact may be a short-period phenomenum. Our observations of ejecta distribution detected large change in ejecta trajectory due to the solar radiation pressure.
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