C/67P＜チュリュモフ-ゲラシメンコ彗星＞
2009/03/20T19:22:22〜19:31:34までの30秒間露光16枚を合成
露光時間：30秒*16=8分
C/67P＜チュリュモフ-ゲラシメンコ彗星＞
2009/03/20T19:37:12〜19:54:32までの60秒間露光16枚を合成
露光時間：60秒*16=16分
ε160/530mm + LPS-P2 + 300D/ISO400 / EM200Temma2
StellaImage4で合成、レベル補正とリサイズ
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＊ Discovery ＊ |
| During mid-1969, several astronomers from Kiev visited the Alma-Ata Astrophysical Institute to conduct a survey of comets. On September 20, while still at Alma-Ata, Klim Ivanovic Churyumov examined a photograph exposed for periodic comet Comas Sola by Svetlana Ivanovna Gerasimenko on September 11.92, and found a cometary object near the edge of the plate which he assumed was the expected periodic comet. Upon returning to Kiev, the plates went under intense scrutiny. Precise positions were determined for all of the observed comets, as well as estimates of the coma diameter, and photographic magnitude estimates of the comet and nucleus. On October 22, it was realized that the position determined for P/Comas Sola was 1.8° from the expected position based on observations from other observatories. Further examination revealed P/Comas Sola in the proper position, near the limit of the photographic plate, which meant a new comet had been found. They estimated the magnitude of the new comet as 13, and said it had a faint coma 0.6 arc minute across, with a central condensation about 0.3 arc minute across. There was also a faint tail extending 1 arc minute toward PA 280 degrees. |
2009年03月20日
