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).

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).

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.

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

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.

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.

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.

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.

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.

Brightest comets seen since 1935.
[updated 2020 July 5]
The brightest comets observed by ground-based observers since 1935.

The "peak m1" is the maximum observed total visual magnitude as seen by ground-ased observers. Only those comets brighter than fourth magnitude are listed below. Note that some comets have been seen brighter than listed below in spacecraft images when the comets were too close to the sun for ground-based observation.

cf. Comet C/2020 F3 (NEOWISE) is 1.5 mag.

1935년 이후 가장 밝은 혜성.

[2020년 7월 업데이트함]

1935년 이후 지상 관측자들이 관측한 가장 밝은 혜성들.

"peak m1"은 지상 관측자가 관측한 혜성의 최대 밝기에서의 전체 안시 등급입니다. 단지 4등급보다 더 밝은 혜성들에 대해 아래에서 보여줍니다. 어떤 혜성들은 지상 관측자들이 보기에 태양과 너무 가까워서 우주 망원경의 이미지에서 관측되었고 아래 열거된 혜성들보다 더 밝은 경우도 있지만 이들 혜성들은 지상에서 관측한 것이 아니기때문에 리스트에 포함하고 있지 않습니다.

cf) C/2020 F3 (니오와이즈) 혜성은 1.5등급입니다. 2000년 이후 5번째로 밝은 혜성입니다.

peak

m1 Comet

---- ----------------------

(-10) C/1965 S1 (Ikeya-Seki)

(-5.5) C/2006 P1 (McNaught)

-3.0 C/1975 V1 (West)

(-3) C/1947 X1 (Southern comet)

(-1) C/1948 V1 (Eclipse comet)

(-1) C/2011 W3 (Lovejoy)

-0.8 C/1995 O1 (Hale-Bopp)

(-0.5) C/1956 R1 (Arend-Roland)

(-0.5) C/2002 V1 (NEAT)

0.0 C/1996 B2 (Hyakutake)

0.0 C/1969 Y1 (Bennett)

(0) C/1973 E1 (Kohoutek)

(0) C/1962 C1 (Seki-Lines)

0.5 C/1998 J1 (SOHO)

1.0 C/1957 P1 (Mrkos)

(1.0) C/2011 L4 (PANSTARRS)

(1) C/1970 K1 (White-Ortiz-Bolelli)

(1.5) C/2020 F3 (NEOWISE)

1.7 C/1983 H1 (IRAS-Araki-Alcock)

(2) C/1941 B2 (de Kock-Paraskevopoulos)

(2.2) C/2002 T7 (LINEAR)

2.4 1P/1982 U1 (Halley)

(2.4) 17P (Holmes) [Oct. 2007]

2.5 C/2000 WM_1 (LINEAR)

2.7 C/1964 N1 (Ikeya)

2.8 C/2001 Q4 (NEAT)

2.8 C/1989 W1 (Aarseth-Brewington)

2.8 C/1963 A1 (Ikeya)

2.9 153P/2002 C1 (Ikeya-Zhang)

3.0 C/2001 A2 (LINEAR)

3.3 C/1936 K1 (Peltier)

(3.3) C/2004 F4 (Bradfield)

3.5 C/2004 Q2 (Machholz)

3.5 C/1942 X1 (Whipple-Fedtke-Tevzadze)

3.5 C/1940 R2 (Cunningham)

3.5 C/1939 H1 (Jurlof-Achmarof-Hassel)

3.5 C/1959 Y1 (Burnham)

3.5 C/1969 T1 (Tago-Sato-Kosaka)

3.5 C/1980 Y1 (Bradfield)

(3.5) C/1961 O1 (Wilson-Hubbard)

(3.5) C/1955 L1 (Mrkos)

3.6 C/2012 S1 (ISON)

3.6 C/1990 K1 (Levy)

3.7 C/2014 Q2 (Lovejoy)

3.7 C/1975 N1 (Kobayashi-Berger-Milon)

3.9 46P/Wirtanen [Dec. 2018]

3.9 C/1974 C1 (Bradfield)

3.9 C/1937 N1 (Finsler)

Credit: ICQ(International Comet Quarterly). http://www.icq.eps.harvard.edu/brightest.html

^^