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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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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C/2020 F3 니오와이즈 혜성의 관측 정보. (Updated 11 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/comet_neowise_c2020f3_info_alt_mag_pos_web_new_bsyeom.jpg

 

Large photo:

http://cometsky.com/astronews/comet_neowise_c2020f3_info_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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