C/2020 T2 (Palomar)
2021-05-03T21:34:14/21:56:24(+30sec)までの30秒間露光20枚を合成
露光時間：30秒*20=10分00秒 ISO3200 長秒時ノイズリダクションをオン
t-T=+14sec
Mewlon210FR/2050mm + LPS-P2 + 60D / EM200Temma2
StellaImage6.5で合成、レベル補正とリサイズ
2000*1500を切り取り、640*480にリサイズ
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C/2020 T2 From https://www.minorplanetcenter.net/mpec/K20/K20UH0.html D. A. Duev reports the discovery of a comet found in exposures taken on Oct. 7 UT by the Palomar Mountain Zwicky Transient Facility (I41). He notes the FWHM of the object is approximately 2".5-3", compared to nearby background stars that have FWHM of ~2"; and, the object shows a tail extending to 5" in the westward direction. Numerous prediscovery observations from various sites were later identified. Additional reports of cometary features are as follows:
Physical Parameter Table
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2021年05月03日 10等
