메타데이터
| 항목 |
값 |
| Designation |
198P/ODAS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2005-05-03T01:37:52.590720Z |
| Orbit solution date (soln_date, UTC) |
2024-11-14T12:12:28Z |
| Obs used |
200 |
| NEO |
- |
| M1 |
15.800 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2003-03-31.0000000 |
| e |
0.44765516 |
| q (au) |
1.979289 |
| a (au) |
3.583430 |
| i (deg) |
1.349850 |
| Ω (om, deg) |
358.743588 |
| ω (w, deg) |
69.062685 |
| M (ma, deg) |
248.983482 |
밝기
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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
08:43:53.93 |
+18:44:38.6 |
HIP 42853 |
17.42 |
| 2026-06-01 12:00 |
08:44:40.85 |
+18:41:26.8 |
HIP 42970 |
13.83 |
| 2026-06-02 00:00 |
08:45:27.77 |
+18:38:14.3 |
HIP 42970 |
10.82 |
| 2026-06-02 12:00 |
08:46:14.69 |
+18:35:01.0 |
HIP 43086 |
11.52 |
| 2026-06-03 00:00 |
08:47:01.61 |
+18:31:46.9 |
HIP 43086 |
15.41 |
| 2026-06-03 12:00 |
08:47:48.52 |
+18:28:32.1 |
HIP 43199 |
12.49 |
| 2026-06-04 00:00 |
08:48:35.44 |
+18:25:16.5 |
HIP 43199 |
17.30 |
| 2026-06-04 12:00 |
08:49:22.36 |
+18:22:00.2 |
HIP 43199 |
26.68 |
| 2026-06-05 00:00 |
08:50:09.27 |
+18:18:43.1 |
HIP 43421 |
19.94 |
| 2026-06-05 12:00 |
08:50:56.19 |
+18:15:25.3 |
HIP 43510 |
13.91 |
| 2026-06-06 00:00 |
08:51:43.10 |
+18:12:06.8 |
HIP 43510 |
4.62 |
| 2026-06-06 12:00 |
08:52:30.00 |
+18:08:47.5 |
HIP 43510 |
10.92 |
| 2026-06-07 00:00 |
08:53:16.90 |
+18:05:27.5 |
HIP 43510 |
22.09 |
| 2026-06-07 12:00 |
08:54:03.80 |
+18:02:06.7 |
HIP 43672 |
29.57 |
| 2026-06-08 00:00 |
08:54:50.70 |
+17:58:45.2 |
HIP 43846 |
23.64 |
| 2026-06-08 12:00 |
08:55:37.58 |
+17:55:23.0 |
HIP 43846 |
15.79 |
| 2026-06-09 00:00 |
08:56:24.47 |
+17:52:00.0 |
HIP 43846 |
14.53 |
| 2026-06-09 12:00 |
08:57:11.34 |
+17:48:36.3 |
HIP 43915 |
20.63 |
| 2026-06-10 00:00 |
08:57:58.22 |
+17:45:11.9 |
HIP 43915 |
23.72 |
| 2026-06-10 12:00 |
08:58:45.08 |
+17:41:46.8 |
HIP 44125 |
22.67 |
| 2026-06-11 00:00 |
08:59:31.94 |
+17:38:21.0 |
HIP 44125 |
25.77 |
| 2026-06-11 12:00 |
09:00:18.78 |
+17:34:54.4 |
HIP 44358 |
28.30 |
| 2026-06-12 00:00 |
09:01:05.63 |
+17:31:27.2 |
HIP 44358 |
17.32 |
| 2026-06-12 12:00 |
09:01:52.46 |
+17:27:59.2 |
HIP 44358 |
8.51 |
| 2026-06-13 00:00 |
09:02:39.28 |
+17:24:30.5 |
HIP 44358 |
10.88 |
| 2026-06-13 12:00 |
09:03:26.09 |
+17:21:01.2 |
HIP 44432 |
14.03 |
| 2026-06-14 00:00 |
09:04:12.90 |
+17:17:31.1 |
HIP 44432 |
22.79 |
| 2026-06-14 12:00 |
09:04:59.69 |
+17:14:00.4 |
HIP 44637 |
14.43 |
| 2026-06-15 00:00 |
09:05:46.47 |
+17:10:28.9 |
HIP 44674 |
7.91 |
| 2026-06-15 12:00 |
09:06:33.24 |
+17:06:56.8 |
HIP 44674 |
4.22 |
| 2026-06-16 00:00 |
09:07:19.99 |
+17:03:24.0 |
HIP 44674 |
15.75 |
| 2026-06-16 12:00 |
09:08:06.74 |
+16:59:50.5 |
HIP 44908 |
18.22 |
| 2026-06-17 00:00 |
09:08:53.47 |
+16:56:16.4 |
HIP 44870 |
14.90 |
| 2026-06-17 12:00 |
09:09:40.18 |
+16:52:41.6 |
HIP 44870 |
19.01 |
| 2026-06-18 00:00 |
09:10:26.88 |
+16:49:06.2 |
HIP 44870 |
27.87 |
| 2026-06-18 12:00 |
09:11:13.56 |
+16:45:30.1 |
HIP 45209 |
23.79 |
| 2026-06-19 00:00 |
09:12:00.22 |
+16:41:53.3 |
HIP 45209 |
12.05 |
| 2026-06-19 12:00 |
09:12:46.87 |
+16:38:15.9 |
HIP 45209 |
0.48 |
| 2026-06-20 00:00 |
09:13:33.50 |
+16:34:37.9 |
HIP 45209 |
11.45 |
| 2026-06-20 12:00 |
09:14:20.11 |
+16:30:59.2 |
HIP 45209 |
23.20 |
| 2026-06-21 00:00 |
09:15:06.70 |
+16:27:20.0 |
HIP 45387 |
27.14 |
| 2026-06-21 12:00 |
09:15:53.27 |
+16:23:40.1 |
HIP 45579 |
23.29 |
| 2026-06-22 00:00 |
09:16:39.83 |
+16:19:59.5 |
HIP 45579 |
16.55 |