C/2002 X5 (Kudo-Fujikawa)
메타데이터
| 항목 | 값 |
|---|---|
| Designation | C/2002 X5 (Kudo-Fujikawa) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2003-01-29T00:03:18.599040Z |
| Orbit solution date (soln_date, UTC) | 2021-04-15T23:30:24Z |
| Obs used | 514 |
| NEO | - |
| M1 | 10.600 |
| K1 | 11.500 |
| PC | 0.030 |
Osculating 궤도요소
| 항목 | 값 |
|---|---|
| Epoch (epoch_cal, TDB) | 2003-01-20.0000000 |
| e | 0.99984090 |
| q (au) | 0.189934 |
| a (au) | 1193.800858 |
| i (deg) | 94.152279 |
| Ω (om, deg) | 119.065024 |
| ω (w, deg) | 187.584474 |
| M (ma, deg) | 359.999785 |
밝기
산란 + 전체 선형
$$ M_a = (7.886 + 4.159\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
모델 상수
| 항목 | 값 |
|---|---|
| H0 | 7.886 |
| n | 4.159 |
| gf | 1.000 |
| gb | -0.500 |
| k | 1.000 |
| δ90 | 10.000 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) | 끝 (UTC) | a | b |
|---|---|---|---|
| 2002-12-14 | 2002-12-23 | +17.1755 | -0.401 |
| 2002-12-23 | 2002-12-31 | -8.3536 | +0.041 |
| 2002-12-31 | 2003-01-19 | -3.8086 | -0.506 |
| 2003-02-07 | 2003-02-20 | -3.9273 | +0.459 |
| 2003-02-20 | 2003-02-27 | -12.3277 | -0.141 |
| 2003-02-27 | 2003-03-18 | -7.0995 | +0.825 |
| 2003-03-18 | 2003-03-31 | +6.6412 | -0.016 |
| 2003-03-31 | 2003-04-22 | +52.0092 | -8.310 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-09-20 00:00 | 08:09:16.82 | +20:26:03.6 | HIP 39934 | 18.94 |
| 2026-09-20 12:00 | 08:09:18.22 | +20:26:00.0 | HIP 39934 | 18.87 |
| 2026-09-21 00:00 | 08:09:19.61 | +20:25:56.5 | HIP 39934 | 18.81 |
| 2026-09-21 12:00 | 08:09:20.97 | +20:25:53.0 | HIP 39934 | 18.76 |
| 2026-09-22 00:00 | 08:09:22.31 | +20:25:49.6 | HIP 39934 | 18.71 |
| 2026-09-22 12:00 | 08:09:23.64 | +20:25:46.3 | HIP 39934 | 18.67 |
| 2026-09-23 00:00 | 08:09:24.94 | +20:25:43.0 | HIP 39934 | 18.64 |
| 2026-09-23 12:00 | 08:09:26.23 | +20:25:39.7 | HIP 39934 | 18.61 |
| 2026-09-24 00:00 | 08:09:27.50 | +20:25:36.6 | HIP 39934 | 18.59 |
| 2026-09-24 12:00 | 08:09:28.75 | +20:25:33.5 | HIP 39934 | 18.57 |
| 2026-09-25 00:00 | 08:09:29.97 | +20:25:30.4 | HIP 39934 | 18.55 |
| 2026-09-25 12:00 | 08:09:31.18 | +20:25:27.4 | HIP 39934 | 18.55 |
| 2026-09-26 00:00 | 08:09:32.37 | +20:25:24.5 | HIP 39934 | 18.54 |
| 2026-09-26 12:00 | 08:09:33.54 | +20:25:21.6 | HIP 39934 | 18.54 |
| 2026-09-27 00:00 | 08:09:34.69 | +20:25:18.8 | HIP 39934 | 18.55 |
| 2026-09-27 12:00 | 08:09:35.83 | +20:25:16.1 | HIP 39934 | 18.56 |
| 2026-09-28 00:00 | 08:09:36.94 | +20:25:13.4 | HIP 39934 | 18.57 |
| 2026-09-28 12:00 | 08:09:38.03 | +20:25:10.7 | HIP 39934 | 18.59 |
| 2026-09-29 00:00 | 08:09:39.10 | +20:25:08.2 | HIP 39934 | 18.61 |
| 2026-09-29 12:00 | 08:09:40.15 | +20:25:05.7 | HIP 39934 | 18.63 |
| 2026-09-30 00:00 | 08:09:41.18 | +20:25:03.2 | HIP 39934 | 18.66 |
| 2026-09-30 12:00 | 08:09:42.19 | +20:25:00.9 | HIP 39934 | 18.68 |
| 2026-10-01 00:00 | 08:09:43.18 | +20:24:58.5 | HIP 39934 | 18.72 |
| 2026-10-01 12:00 | 08:09:44.14 | +20:24:56.3 | HIP 39934 | 18.75 |
| 2026-10-02 00:00 | 08:09:45.09 | +20:24:54.1 | HIP 39934 | 18.79 |
| 2026-10-02 12:00 | 08:09:46.02 | +20:24:52.0 | HIP 39934 | 18.82 |
| 2026-10-03 00:00 | 08:09:46.93 | +20:24:49.9 | HIP 39934 | 18.86 |
| 2026-10-03 12:00 | 08:09:47.81 | +20:24:47.9 | HIP 39934 | 18.91 |
| 2026-10-04 00:00 | 08:09:48.68 | +20:24:46.0 | HIP 39934 | 18.95 |
| 2026-10-04 12:00 | 08:09:49.52 | +20:24:44.1 | HIP 39934 | 18.99 |
| 2026-10-05 00:00 | 08:09:50.34 | +20:24:42.4 | HIP 39934 | 19.04 |
| 2026-10-05 12:00 | 08:09:51.14 | +20:24:40.6 | HIP 39934 | 19.09 |
| 2026-10-06 00:00 | 08:09:51.92 | +20:24:39.0 | HIP 39934 | 19.13 |
| 2026-10-06 12:00 | 08:09:52.68 | +20:24:37.4 | HIP 39934 | 19.18 |
| 2026-10-07 00:00 | 08:09:53.41 | +20:24:35.8 | HIP 39934 | 19.23 |
| 2026-10-07 12:00 | 08:09:54.13 | +20:24:34.4 | HIP 39934 | 19.28 |
| 2026-10-08 00:00 | 08:09:54.82 | +20:24:33.0 | HIP 39934 | 19.33 |
| 2026-10-08 12:00 | 08:09:55.49 | +20:24:31.6 | HIP 39934 | 19.37 |
| 2026-10-09 00:00 | 08:09:56.14 | +20:24:30.4 | HIP 39934 | 19.42 |
| 2026-10-09 12:00 | 08:09:56.77 | +20:24:29.2 | HIP 39934 | 19.47 |
| 2026-10-10 00:00 | 08:09:57.37 | +20:24:28.1 | HIP 39934 | 19.52 |
| 2026-10-10 12:00 | 08:09:57.95 | +20:24:27.0 | HIP 39934 | 19.57 |
| 2026-10-11 00:00 | 08:09:58.51 | +20:24:26.0 | HIP 39934 | 19.61 |