C/2020 F3 니오와이즈 혜성의 관측 정보. (Updated 27 July).

Comet C/2020 F3 (NEOWISE) Observation Information.

 

NEOWISE (C/2020 F3) 혜성의 고도, 밝기, 그리고 위치 변화 (위치: 36° N 기준).

 

http://cometsky.com/astronews/200727_comet_neowise_c2020f3_alt_mag_pos_med_new_bsyeom.jpg

 

Large photo (3,390 x 4,283 pixels):

http://cometsky.com/astronews/200727_comet_neowise_c2020f3_alt_mag_pos_large_new_bsyeom.jpg

 

염범석. Bum-Suk Yeom.

 

Magnitude data: Central Bureau for Astronomical Telegrams. Electronic Telegram No. 4804. (CBET 4804).

 

Epoch = 2020 July 10.0 TT

T = 2020 July 3.68072 TT, Peri. = 37.27545

e = 0.9991822, Node = 61.01042 (2000.0)

q = 0.2946898 AU, Incl. = 128.93737

 

Photometric power-law parameters H = 7.0 and 2.5n = 12.5. Heliocentric distance 1.6 AU < r. 

 

Total apparent magnitude m =  H + 5 log10 d + 2.5 n log10 r . 
Comets’ intrinsic brightness is usually expressed in terms of the absolute total magnitude H, which is related to the apparent magnitude m using the relation H = m − 5 log10 d − 2.5 n log10 r. Here d and r are the geocentric and heliocentric distances, respectively, and n is the photometric index, which strongly depends on the strength and nature of a given comet’s activity. For an inactive (asteroidal) body, n = 2. Often n = 4 is assumed for comets, leading to the  conventional absolute magnitude H10. However, comets show great diversity in their activity, and n indexes ranging from 1 to 10 have been reported for different comets (with even more extreme values on occasion). (Vokrouhlický, Nesvorný, & Dones 2019, AJ, 157, 181).

 

 

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The expected brightness of the comet C/2020 F3 (NEOWISE).
니오와이즈 (C/2020 F3) 혜성의 예상 밝기. 2020. 07. 23. ~ 08. 19. UTC.

 

혜성은 8월 10일까지는 사진 촬영하기에 적당한 밝기라고 생각합니다.

 

http://cometsky.com/astronews/200727_lc_comet_neowise_C2020F3_cbet_web_new_bsyeom.jpg

 

Large photo:

http://cometsky.com/astronews/200727_lc_comet_neowise_C2020F3_cbet_med_new_bsyeom.jpg

 

Magnitude data: Central Bureau for Astronomical Telegrams. Electronic Telegram No. 4804. (CBET 4804).

 

Epoch = 2020 July 10.0 TT

T = 2020 July 3.68072 TT, Peri. = 37.27545

e = 0.9991822, Node = 61.01042 (2000.0)

q = 0.2946898 AU, Incl. = 128.93737

 

Photometric power-law parameters H = 7.0 and 2.5n = 12.5. Heliocentric distance 1.6 AU < r. 

 

Total apparent magnitude m =  H + 5 log10 d + 2.5 n log10 r . 
Comets’ intrinsic brightness is usually expressed in terms of the absolute total magnitude H, which is related to the apparent magnitude m using the relation H = m − 5 log10 d − 2.5 n log10 r. Here d and r are the geocentric and heliocentric distances, respectively, and n is the photometric index, which strongly depends on the strength and nature of a given comet’s activity. For an inactive (asteroidal) body, n = 2. Often n = 4 is assumed for comets, leading to the  conventional absolute magnitude H10. However, comets show great diversity in their activity, and n indexes ranging from 1 to 10 have been reported for different comets (with even more extreme values on occasion). (Vokrouhlický, Nesvorný, & Dones 2019, AJ, 157, 181).

 

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Comet C/2020 F3 (NEOWISE).

C/2020 F3 (니오와이즈) 혜성.

 

2020-07-18 21:30 (KST). 

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_200718_web_bsyeom.jpg

 

Large photo:

http://cometsky.com/astrophotos/comet_c2020f3_neowise_200718_med_bsyeom.jpg

 

엷은 구름이 계속 있어서 깨끗한 혜성 사진을 얻지 못했습니다. 

 

염범석. Bum-Suk Yeom.

 

Taken by Bum-Suk Yeom (www.cometsky.com) on July 18, 2020 UTC @ Namwon, South Korea. Details: 12:30 UTC (21:30 KST), 60mm refractor (Takahashi FS-60CB with Reducer, f=264mm, F4.4), EOS 5D Mark III camera, SkyGuider Pro portable mount, ISO 1600, f/4.4, 25 sec x 8 pic stack (total 200 sec).

 

2020. 07. 18. 21:30 KST, 60mm 굴절 망원경 (다카하시 FS-60CB + 리듀서, f=264mm, F4.4), 캐논 EOS 5D Mark III 카메라, 스카이가이더 프로 휴대용 적도의, f/4.4, ISO 1600, 노출시간 25초 x 8장 합성 (총 200초 노출), 전라북도 남원시, 염범석 Bum-Suk Yeom.

 

 



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스마트폰 배경화면용 사진.
Smartphone background images.

 

Android ver.:
http://cometsky.com/astrophotos/comet_neowise_android_bg.jpg

 

iPhone ver.:
http://cometsky.com/astrophotos/comet_neowise_ios_bg.jpg

 

 

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Comet C/2020 F3 (NEOWISE). 2020.07.16. No. 1.

C/2020 F3 니오와이즈 혜성.

 

2020-07-16 20:52 (KST).

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200716_01_web_bsyeom.jpg

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200716_01_wide_web_bsyeom.jpg

 

Large photo:

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200716_01_med_bsyeom.jpg

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200716_01_wide_med_bsyeom.jpg

 

4K Movie : youtu.be/gCkvgzQonW0

 

염범석. Bum-Suk Yeom.

 

Taken by Bum-Suk Yeom (www.cometsky.com) on July 16, 2020 UTC @ Namwon, South Korea. Details: 11:52 UTC (20:52 KST), Sigma Art 40mm F1.4 lens, Canon EOS 5D Mark III camera, Manfrotto 055 tripod, ISO 1600, f/4, 6 sec.

 

2020. 07. 16. 20:52 KST, 시그마 아트 40mm F1.4 렌즈, 캐논 EOS 5D Mark III 카메라, 맨프로토 055 삼각대, ISO 1600, f/4, 노출시간 6초, 전라북도 남원시, 염범석 Bum-Suk Yeom.

 

 

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Comet C/2020 F3 (NEOWISE) 4K movie.

니오와이즈 (NEOWISE, C/2020 F3) 혜성 4K 동영상.


16 July 2020 UTC. 
Bum-Suk Yeom. 염범석. 

 

4K Timelapse movie : youtu.be/gCkvgzQonW0

Canon EOS 5D  Mark III camera, Sigma Art 40mm F1.4 lens, f/4, ISO 1600, 6 sec x 460.

 

 

 

 

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C/2020 F3 니오와이즈 혜성의 꼬리 길이. 

Tail lengths of the Comet C/2020 F3 NEOWISE.

 

http://cometsky.com/astronews/comet_c2020f3_neowise_tail_length_est_bsyeom.jpg

 

이온 꼬리(Ion tail): 16°, 먼지 꼬리(Dust tail): 14°.

 

니오와이즈 (NEOWISE, C/2020 F3) 혜성의 꼬리 길이를 사진으로 대략적으로 계산해 보았습니다. 이온 꼬리(Ion tail)는 사진상에서 일부분만 찍힌 것 같습니다. 그래서 아마도 실제 이온 꼬리의 길이는 계산한 값보다 더 길것으로 예상합니다.

 

I have roughly calculated the tail length of Comet NEOWISE in the photo. Ion tail appears to have been partially photographed. So the actual length of the ion tail is expected to be longer than this value.

 

Image credit: Petr Horálek / Bum-Suk Yeom.

 



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Comet C/2020 F3 (NEOWISE). 2020.07.09. No. 3.

C/2020 F3 니오와이즈 혜성.

 

2020-07-09 04:30 (KST).

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200709_03_web_bsyeom.jpg

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200709_03_web_ex_bsyeom.jpg

 

Large photo:

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200709_03_med_bsyeom.jpg

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200709_03_med_ex_bsyeom.jpg

 

 

염범석. Bum-Suk Yeom.

 

Taken by Bum-Suk Yeom (www.cometsky.com) on July 08, 2020 UTC @ Namwon, South Korea. Details: 19:30 UTC (04:30 July 09 KST), Canon EF-M 22mm F2.0 lens, Canon EOS M6 camera, Manfrotto 055 tripod, ISO 200, f/5.6, 6 sec.

 

2020. 07. 09. 04:30 KST, 캐논 EF-M 22mm F2.0 렌즈, 캐논 EOS M6 카메라, 맨프로토 055 삼각대, f/5.6, ISO 200, 노출시간 6초, 전라북도 남원시, 염범석 Bum-Suk Yeom.

 

 

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Comet C/2020 F3 (NEOWISE).

C/2020 F3 (니오와이즈) 혜성.

 

2020-07-09 04:22 (KST).

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200709_01_web_bsyeom.jpg

 

http://cometsky.com/astrophotos/comet_c2020f3_neowise_20200709_01_web_rot_bsyeom.jpg

 

염범석. Bum-Suk Yeom.

 

Taken by Bum-Suk Yeom (www.cometsky.com) on July 08, 2020 UTC @ Namwon, South Korea. Details: 19:22 UTC (04:22 July 09 KST), 60mm refractor (Takahashi FS-60CB with Flattener, f=374mm, F6.2), EOS 5D Mark III camera, SkyGuider Pro portable mount, ISO 400, f/6.2, 8 sec x 10 pic stack.

 

2020. 07. 09. 04:22 KST, 60mm 굴절 망원경 (다카하시 FS-60CB + 플래트너, f=374mm, F6.2), 캐논 EOS 5D Mark III 카메라, 스카이가이더 프로 휴대용 적도의, f/6.2, ISO 400, 노출시간 8초 x 10장 합성, 전라북도 남원시, 염범석 Bum-Suk Yeom.

 

 

 

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Comet C/2020 F3 (NEOWISE).

C/2020 F3 니오와이즈 혜성.

 

2020-07-09 04:35 (KST).

 

http://cometsky.com/astrophotos/comet_neowise_c2020f3_20200709_web_bsyeom.jpg

 

염범석. Bum-Suk Yeom.

 

Taken by Bum-Suk Yeom (www.cometsky.com) on July 08, 2020 UTC @ Namwon, South Korea. Details: 19:35 UTC (04:35 July 09 KST), Samyang 135mm F2.0 lens, EOS M6 camera, Manfrotto 055 tripod, ISO 200, f/5.6, 0.4 sec.

 

2020. 07. 09. 04:35 KST, 삼양 135mm F2.0 렌즈, 캐논 EOS M6 카메라, 맨프로토 055 삼각대, f/5.6, ISO 200, 노출시간 0.4초, 전라북도 남원시, 염범석 Bum-Suk Yeom.

 

 

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