Comet Archive

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C/1898 R1 (Perrine-Chofardet)

메타데이터

항목 값
Designation C/1898 R1 (Perrine-Chofardet)
Type C
Perihelion (tp_cal, UTC) 1898-10-21T00:56:12.053760Z
Orbit solution date (soln_date, UTC) 2021-04-15T23:28:56Z
Obs used 71
NEO -
M1 7.500
K1 4.500
PC -
Osculating 궤도요소
항목 값
Epoch (epoch_cal, TDB) 1898-09-21.0000000
e 1.00003407
q (au) 0.420481
a (au) -12342.273054
i (deg) 28.858333
Ω (om, deg) 36.291475
ω (w, deg) 162.363692
M (ma, deg) -0.000022

밝기

C/1898 R1 (Perrine-Chofardet) · Magnitude (Full range)

산란 + 전체 선형

$$ M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$

모델 상수

항목 값
H0 -
n -
gf -
gb -
k -
δ90 -
파라미터 기호 범위 설명
태양·지구거리 1 AU에서의 절대등급 H0 -5 to 20 혜성의 고유 밝기
광도 기울기 파라미터 n 2 to 6 태양거리 변화에 따른 밝기 변화율
전방 산란 비대칭 계수 gf 0.8 to 1 전방 산란의 강도
후방 산란 비대칭 계수 gb -1 to -0.5 후방 산란의 강도
분할 계수 k 0.8 to 1 전·후방 산란 기여도 비율
먼지/가스 밝기 비 δ90 1 to 10 코마에서 먼지 산란 대비 가스 방출의 상대 기여

참고: EPSC-DPS2025-160

천체력

Date/Time (UTC) RA (J2000) Dec (J2000) Nearest HIP Dist from HIP (arcmin)
2026-02-03 00:00 01:11:49.71 -04:31:27.1 HIP 5620 5.17
2026-02-03 12:00 01:11:50.04 -04:31:22.7 HIP 5620 5.07
2026-02-04 00:00 01:11:50.37 -04:31:18.2 HIP 5620 4.97
2026-02-04 12:00 01:11:50.71 -04:31:13.8 HIP 5620 4.86
2026-02-05 00:00 01:11:51.06 -04:31:09.3 HIP 5620 4.75
2026-02-05 12:00 01:11:51.41 -04:31:04.7 HIP 5620 4.65
2026-02-06 00:00 01:11:51.76 -04:31:00.2 HIP 5620 4.54
2026-02-06 12:00 01:11:52.13 -04:30:55.6 HIP 5620 4.43
2026-02-07 00:00 01:11:52.49 -04:30:51.0 HIP 5620 4.32
2026-02-07 12:00 01:11:52.87 -04:30:46.3 HIP 5620 4.20
2026-02-08 00:00 01:11:53.25 -04:30:41.7 HIP 5620 4.09
2026-02-08 12:00 01:11:53.64 -04:30:37.0 HIP 5620 3.98
2026-02-09 00:00 01:11:54.03 -04:30:32.3 HIP 5620 3.86
2026-02-09 12:00 01:11:54.43 -04:30:27.6 HIP 5620 3.74
2026-02-10 00:00 01:11:54.83 -04:30:22.8 HIP 5620 3.63
2026-02-10 12:00 01:11:55.24 -04:30:18.0 HIP 5620 3.51
2026-02-11 00:00 01:11:55.66 -04:30:13.2 HIP 5620 3.39
2026-02-11 12:00 01:11:56.08 -04:30:08.4 HIP 5620 3.27
2026-02-12 00:00 01:11:56.50 -04:30:03.6 HIP 5620 3.15
2026-02-12 12:00 01:11:56.94 -04:29:58.7 HIP 5620 3.03
2026-02-13 00:00 01:11:57.38 -04:29:53.8 HIP 5620 2.91
2026-02-13 12:00 01:11:57.82 -04:29:48.9 HIP 5620 2.80
2026-02-14 00:00 01:11:58.27 -04:29:44.0 HIP 5620 2.68
2026-02-14 12:00 01:11:58.73 -04:29:39.1 HIP 5620 2.56
2026-02-15 00:00 01:11:59.19 -04:29:34.1 HIP 5620 2.44
2026-02-15 12:00 01:11:59.65 -04:29:29.1 HIP 5620 2.32
2026-02-16 00:00 01:12:00.13 -04:29:24.1 HIP 5620 2.21
2026-02-16 12:00 01:12:00.60 -04:29:19.1 HIP 5620 2.10
2026-02-17 00:00 01:12:01.09 -04:29:14.1 HIP 5620 1.99
2026-02-17 12:00 01:12:01.57 -04:29:09.0 HIP 5620 1.88
2026-02-18 00:00 01:12:02.07 -04:29:04.0 HIP 5620 1.78
2026-02-18 12:00 01:12:02.56 -04:28:58.9 HIP 5620 1.69
2026-02-19 00:00 01:12:03.07 -04:28:53.8 HIP 5620 1.60
2026-02-19 12:00 01:12:03.58 -04:28:48.6 HIP 5620 1.52
2026-02-20 00:00 01:12:04.09 -04:28:43.5 HIP 5620 1.46
2026-02-20 12:00 01:12:04.61 -04:28:38.4 HIP 5620 1.40
2026-02-21 00:00 01:12:05.13 -04:28:33.2 HIP 5620 1.37
2026-02-21 12:00 01:12:05.66 -04:28:28.0 HIP 5620 1.34
2026-02-22 00:00 01:12:06.20 -04:28:22.9 HIP 5620 1.34
2026-02-22 12:00 01:12:06.74 -04:28:17.7 HIP 5620 1.35
2026-02-23 00:00 01:12:07.28 -04:28:12.4 HIP 5620 1.39
2026-02-23 12:00 01:12:07.83 -04:28:07.2 HIP 5620 1.44
2026-02-24 00:00 01:12:08.38 -04:28:02.0 HIP 5620 1.50