C/2021 A1 レオナード(Leonard)彗星  Updated on Feb 20, 2022!

C2021A1_2022/01/01-02

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C2021A1_2021/12/30-31

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C2021A1_2021/12/28-29

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C2021A1_2021/12/26-27

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C2021A1_2021/12/22-23

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C2021A1_2021/12/20-21

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C2021A1_2021/12/18-19

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C2021A1_2021/12/03-04

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C2021A1_2021/12/02

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C2021A1_2021/11/26

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C2021A1_2021/11/12-19

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C/2021 A1 レオナード(Leonard)彗星写真の拡大写真と説明

【No.22, 22-1】2022/1/2

51日後のレナード彗星C/2021A1。予報光度は4.6等。みなみのうお座(PsA)を移動中。 高度6度と低く、電線との干渉で、総露出が64s, 56sしか稼げず、尾の微細構造は愚か、長い尾も写っていない。 明日以降、高度が低く、南下してしまうため、この日が最後の撮影となる。

Fig.22

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Fig. 22 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:32 on January 2, 2022. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 4sx16 (64s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.22-1

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Fig. 22-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:32 on January 1, 2022. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 1600) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image is obtained by compositing the images acquired by 8s x 7 (56s) no-touch guide shooting based on the comet nucleus of SI9.

【No.21, 21-1】2022/1/1

50日後で、2022年最初のレナード彗星C/2021A1。予報光度は4.6等。みなみのうお座(PsA)を移動中。 総露出は120s,220s、高度6度だが、12/28のような尾の微細構造は写らず、長い尾も微かに見える程度の衰えた。 写りが悪化した原因に電線の影響が出ており、これを消去するためにσClippingでコンポジットしている。 彗星高度が7度と6度の間に大きな差が出ているのは、この電線の影響も一因だと思われる。

Fig.

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Fig. 21 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:32 on January 1, 2022. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 4s x 30(120s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.

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Fig. 21-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:32 on January 1, 2022. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 1600) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image is obtained by compositing the images acquired by 10s x 22 (220s) no-touch guide shooting based on the comet nucleus of SI9.

【No.20, 20-1】2021/12/31

49日後で、2021年最後のレナード彗星C/2021A1。予報光度は4.5等。みなみのうお座(PsA)を移動中。 総露出は165s,250sとそれなりだが、高度が6度となり、尾の微細構造は写らず、長い尾は微かに見える。

Fig.20

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Fig. 20 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:34 on December 31, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 5s x 33(165s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.20-1

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Fig. 20-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:34 on December 31, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image is obtained by compositing the images acquired by 10s x 25 (250s) no-touch guide shooting based on the comet nucleus of SI9.

【No.19, 19-1】2021/12/30

48日後のレナード彗星C/2021A1。予報光度は4.4等。みなみのうお座(PsA)を移動中。 総露出が120s,320sとそれなりだが、尾の微細構造の写りは、12/28ほどは、はっきりしない。

Fig.19

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Fig. 19 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:34 on December 30, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 4s x 30(120s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.19-1

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Fig. 19-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:34 on December 30, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image is obtained by compositing the images acquired by 10s x 32 (320s) no-touch guide shooting based on the comet nucleus of SI9.

【No.18, 18-1】2021/12/29

47日後のレナード彗星C/2021A1。予報光度は4.3等。けんびきょう座(Mic)を移動中。 雲と電線の干渉で、総露出が8s,140sと稼げず、薄雲を通しての撮影のため、尾の様子が微かにしか写らず、赤みを帯びている。 尚、電線の影響を除去するために、σClippingの加算平均でコンポジットしている。

Fig.18

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Fig. 18 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:32 on December 29, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 4s x 2(8s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.18-1

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Fig. 18-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:32 on December 29, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image is obtained by compositing the images acquired by 10s x 14 (140s) no-touch guide shooting based on the comet nucleus of SI9.

【No.17】2021/12/28

46日後のレナード彗星C/2021A1。予報光度は4.2等。けんびきょう座(Mic)を移動中。 総露出が490sと長くできたので、彗星核後方に複雑に伸びるイオンテールがやっと写った。

Fig.17

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Fig. 17 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:36 on December 28, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 10s×49 (490s) no-touch guide shooting based on the comet nucleus of SI9.

【No.16, 16-1】2021/12/27

45日後のレナード彗星C/2021A1。予報光度は4.1等。けんびきょう座(Mic)を移動中。 雲の影響で総露出が20s,150sと、昨日に比べて長くできず、薄雲のため、昨日に比べて、彗星核後方の尾の様子が薄れている。

Fig.16

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Fig. 16 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:35 on December 27, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 4s×5 (20s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.16-1

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Fig. 16-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:36 on December 27, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 10s×15 (150s) no-touch guide shooting based on the comet nucleus of SI9.

【No.15, 15-1】2021/12/26

44日後のレナード彗星C/2021A1。予報光度は4.0等。けんびきょう座(Mic)を移動中。 薄雲が無く、高度が8度で撮影でき、露出も204s,347.5sと長くできたので、青みが戻り、核周りに広がった尾の様子もはっきりとしてきた。

Fig.15

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Fig. 15 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:33 on December 26, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 4s×51 (204s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.15-1

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Fig. 15-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:29 on December 26, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s×31+5sx10+10sx22 (347.5s) no-touch guide shooting based on the comet nucleus of SI9.

【No.14, 14-1】2021/12/23

41日後のレナード彗星C/2021A1。予報光度は3.7等。けんびきょう座(Mic)を移動中。 薄雲が無く、高度が8度弱で撮影できたので、青みが戻った。

Fig.14

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Fig. 14 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:36 on December 23, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 36 (90s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.14-1

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Fig. 14-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:37 on December 23, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 96(4min) no-touch guide shooting based on the comet nucleus of SI9.

【No.13, 13-1】2021/12/22

40日後のレナード彗星C/2021A1。予報光度は3.6等。けんびきょう座(Mic)を移動中。 高度が7度前後で撮影できたので、彗星の赤みが少し減った。

Fig.13

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Fig. 13 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:41 on December 22, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 30 (75s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.13-1

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Fig. 13-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:41 on December 22, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 30(75s) no-touch guide shooting based on the comet nucleus of SI9.

【No.12, 12-1】2021/12/21

39日後のレナード彗星C/2021A1。予報光度は3.5等。けんびきょう座(Mic)を移動中。 薄雲があり、高度も4度前後で低くなり、電線もあるので、彗星が赤みを帯びている。

Fig.12

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Fig. 12 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:51 on December 21, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 24 (60s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.12-1

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Fig. 12-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 18:06 on December 21, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 26(65s) no-touch guide shooting based on the comet nucleus of SI9.

【No.11, 11-1】2021/12/20 17:25

38日後のレナード彗星C/2021A1。予報光度は3.4等。いて座(Sgr)を移動中。 天候が良く、高度も高いので、昨日とは異なり、彗星本来の青みが現れている。

Fig.11

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Fig. 11 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:25 on December 20, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 49(122.5s) no-touch guide shooting based on the comet nucleus of SI9.

Fig.11-1

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Fig. 11-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:25 on December 20, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 23(57.5s) no-touch guide shooting based on the comet nucleus of SI9.

【No.10, 10-1】2021/12/19 17:46

37日後のレナード彗星C/2021A1。予報光度は3.3等に少し減光。いて座(Sgr)を移動中。 ひたちなか市街地方面の夕空で、光害とスモッグのため、思ったほど写らず、赤味を帯びた彗星になっているが、彗星核周辺は大きく広がっている。

Fig.10

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Fig. 10 Comet C/2021A1 Leonard in the evening sky, taken by full frame DSLR camera with FL274mm at 17:46 on December 19, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image is obtained by compositing the images acquired by 2.5s × 9 and 3.5s × 14 no-touch guide shooting based on the comet nucleus of SI9.

Fig.10-1

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Fig. 10-1 Comet C/2021A1 Leonard in the evening sky, taken by APS-C DSLR camera with FL650mm at 17:46 on December 19, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. So other exposure condition such as exposure time and guide sysyem is same as Fig. 10.

【No.9】2021/12/18 17:30

36日後に夕空に現れ、金星に近づいたレナード彗星C/2021A1。予報光度は3.1等に増光。いて座(Sgr)を移動中。

Fig.9

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Fig.9 Comet C/2021 A1 Leonard and Venus appearing in the evening sky, taken taken by full frame DSLR camera with FL274mm at 17:30 on December 18, 2021. The camera is Canon EOS 6D (ISO 800) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter. This image was obtained from 6 Raw files of 2 seconds exposure time by the stellar composite average processing of SI9.

【No.8, 8-1】2021/12/11 05:15

29日後で、明け方最後のレナード彗星C/2021A1。予報光度は4.7等に増光し、非常に長い尾が見える。ヘルクレス座(Her)南側を移動中。

Fig.8

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Fig. 8 The last C/2021A1 Leonard comet in the early morning, taken taken by full frame DSLR camera with FL274mm at 05:15 on December 11, 2021. The camera is Canon EOS 6D (ISO 3200) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image was composited by the use of SI9 from the image of 15s x 20 and 30s x 6 by comet tracking auto-guide and the image of 15sx15 of star tracking auto-guide by Metkav composite.

Fig.8-1

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Fig. 8-1 The last C / 2021A1 Leonard comet in the early morning, taken by APS-C DSLR camera with FL650mm at 05:15 on December 11, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter, by the use of the synchronised photo system of EQ6R. So other exposure condition such as exposure time and guide system is same as Fig. 8.

【No.7, 7-1】2021/12/4 04:45

22日後のレナード彗星C/2021A1。予報光度は6.4等に増光。りょうけん座(CVn)南側を移動中。 球状星団M3(NGC5272)から離れていく。

Fig.7

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Fig.7 Comet C/2021 A1 Leonard on next day after closest to the globular cluster M3 by the stellar composite add processing of SI9(StellaImage 9). The original photo data is same as Fig.10. and trimmed.

Fig.7-1

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Fig.7-1 Comet C/2021 A1 Leonard on next day after closest to the globular cluster M3, taken by APS-C DSLR camera with FL650mm at 04:45 on December 04, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image was obtained from 6 Raw files of 30 second exposure time by the Metkav composite add processing of SI9(StellaImage 9), and trimmed.

【No.6, 6-1】2021/12/3 05:00

21日後のレナード彗星C/2021A1。予報光度は6.7等に増光し、更に尾が長くなってきた。りょうけん座(CVn)南側を移動中。 球状星団M3(NGC5272)に最接近。

Fig.6

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Fig.6 Comet C/2021 A1 Leonard closest to the globular cluster M3, taken at 05:00 on December 03, 2021, by the stellar composite add processing of SI9 and trimmed. The original photo data is same as Fig. 8.

Fig.6-1

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Fig.6-1 Comet C/2021 A1 Leonard closest to the globular cluster M3, taken by APS-C DSLR camera with FL650mm at 05:00 on December 03, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 3200) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image was obtained from 3 Raw files of 1 minute exposure time by the Metkav composite add processing of SI9(StellaImage 9), and trimmed.

【No.5, 5-1, 5-2】2021/12/2 04:14

20日後のレナード彗星C/2021A1。予報光度は6.9等に増光し、尾が長くなってきた。りょうけん座(CVn)南側を移動中。 球状星団M3(NGC5272)に接近中。

Fig.5

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Fig.5 Comet C/2021 A1 Leonard approaching the M3 globular cluster, taken by full frame DSLR camera with FL274mm at 04:14 on December 02, 2021. The camera is Canon EOS 6D (ISO 800) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image was obtained from 3 Raw files of 1 minute exposure time by the stellar composite average processing of SI9.

Fig.5-1

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Fig.5-1 Comet C/2021 A1 Leonard approaching the M13 globular cluster by the Metkav composite average processing of SI9. Original photo data is same as Fig. 5.

Fig.5-2

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Fig.5-2 Comet C/2021 A1 Leonard, taken by APS-C DSLR camera with FL650mm at 03:32 on December 02, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 800) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image was obtained from 46 Raw files of 1 minute exposure time by the Metkav composite add processing of SI9(StellaImage 9), and trimmed.

【No.4, 4-1, 4-2, 4-3】2021/11/26 02:55

14日後のレナード彗星C/2021A1。予報光度は8.1等に増光し、尾が長くなってきた。りょうけん座(CVn)南西側を移動中。 くじら銀河NGC4631とホッケースティック銀河NGC4656に最接近中。

Fig.4

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Fig.4 Comet C/2021 A1 Leonard, taken by full frame DSLR camera with FL274mm at 04:36 on November 26, 2021. The camera is Canon EOS 6D (ISO 800) attached to SHARPSTAR 61EDPHⅡ with x0.82 Reducer and LPR-Ⅰfilter, by the use of the synchronised photo system of EQ6R. This image was obtained from 4 Raw files of 1 minute exposure time by the stellar composite average processing of SI9.

Fig.4-1

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Fig.4-1 Comet C/2021 A1 Leonard, taken by APS-C DSLR camera with FL650mm at 04:36 on November 26, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 800) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image was obtained from 55 Raw files of 1 minute exposure time by the stellar composite average processing of SI9(StellaImage 9), and trimmed.

Fig.4-2

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Fig.4-2 Comet C/2021 A1 Leonard, taken by APS-C DSLR camera with FL650mm at 02:55 on November 26, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 800) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image was obtained from 55 Raw files of 1 minute exposure time by the Metkav composite average processing of SI9(StellaImage 9), and trimmed.

Fig.4-3

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Fig.4-3 Comet C/2021 A1 Leonard, taken by APS-C DSLR camera with FL650mm at 02:55 on November 26, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 800) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. This image was obtained from 55 Raw files of 1 minute exposure time by the Metkav composite average processing of SI9(StellaImage 9), trimmed and reversed.

【No.3】2021/11/19 02:40

7日後のレナード彗星C/2021。予報光度は9.2等に増光、りょうけん座(CVn)南西側とかみのけ座(Com)北東側境界を通過中。

Fig.3

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Fig.3 Comet C/2021 A1 Leonard, taken by APS-C DSLR camera with FL650mm at 02:40 on November 19, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 800) attached to Sky-Watcher BKP130 with Coma corrector and CBP filter. And this image was obtained from 8 Raw files of 2 minutes exposure time by the Metkav composite average processing of SI9(StellaImage 9), and trimmed.

【No.2】2021/11/13 03:50

2日目のレナード彗星C/2021。予報光度は10.0等で、りょうけん座(CVn)北側は変わらず。 引き続き、短いがみられる。

Fig.2

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Fig.2 Comet C/2021 A1 Leonard, taken by APS-C DSLR camera with FL274mm at 03:50 on November 13, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 800) attached to SHARPSTAR 61EDPHⅡwith 0.82 Reducer and CBP filter. And this image was obtained from 13 Jpeg files of 2 minutes exposure time by the stellar composite average processing of SI9(StellaImage 9).

【No.1】2021/11/12 03:09

レナード彗星C/2021を初めて撮影した写真。予報光度がまだ10.1等で、りょうけん座(CVn)の北側を通過中の写真。 短いがみられる。

Fig.1

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Fig.1 First shot of Comet C/2021 A1 Leonard, taken by APS-C DSLR camera with FL274mm at 03:09 on November 12, 2021. The camera is Canon EOS Kiss X5 (HKIR Modified, ISO 800) attached to SHARPSTAR 61EDPHⅡwith 0.82 Reducer and CBP filter. This image was obtained from 16 Raw files of 2 minutes exposure time by the stellar composite average processing of SI9(StellaImage 9).

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