메타데이터
| 항목 |
값 |
| Designation |
332P/Ikeya-Murakami |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2010-10-13T08:06:24.744960Z |
| Orbit solution date (soln_date, UTC) |
2017-01-17T16:14:01Z |
| Obs used |
385 |
| NEO |
- |
| M1 |
5.200 |
| K1 |
22.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2010-11-20.0000000 |
| e |
0.48859089 |
| q (au) |
1.578843 |
| a (au) |
3.087241 |
| i (deg) |
9.377956 |
| Ω (om, deg) |
3.818489 |
| ω (w, deg) |
152.429576 |
| M (ma, deg) |
6.843119 |
밝기
산란 + 전체 선형
$$
M_a = (19.314 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.314 |
| n |
6.000 |
| gf |
0.835 |
| gb |
-0.999 |
| k |
0.921 |
| δ90 |
4.888 |
| 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) |
| 2026-05-12 00:00 |
03:19:05.28 |
+23:45:21.3 |
HIP 15552 |
17.83 |
| 2026-05-12 12:00 |
03:19:59.59 |
+23:49:03.0 |
HIP 15552 |
9.14 |
| 2026-05-13 00:00 |
03:20:54.02 |
+23:52:44.2 |
HIP 15552 |
13.62 |
| 2026-05-13 12:00 |
03:21:48.58 |
+23:56:24.9 |
HIP 15552 |
25.01 |
| 2026-05-14 00:00 |
03:22:43.27 |
+24:00:05.1 |
HIP 15844 |
22.99 |
| 2026-05-14 12:00 |
03:23:38.09 |
+24:03:44.8 |
HIP 15844 |
17.84 |
| 2026-05-15 00:00 |
03:24:33.04 |
+24:07:23.9 |
HIP 15844 |
21.17 |
| 2026-05-15 12:00 |
03:25:28.11 |
+24:11:02.4 |
HIP 16074 |
22.95 |
| 2026-05-16 00:00 |
03:26:23.32 |
+24:14:40.4 |
HIP 16074 |
10.01 |
| 2026-05-16 12:00 |
03:27:18.65 |
+24:18:17.8 |
HIP 16074 |
4.13 |
| 2026-05-17 00:00 |
03:28:14.11 |
+24:21:54.6 |
HIP 16132 |
12.29 |
| 2026-05-17 12:00 |
03:29:09.70 |
+24:25:30.8 |
HIP 16305 |
14.80 |
| 2026-05-18 00:00 |
03:30:05.41 |
+24:29:06.5 |
HIP 16305 |
1.66 |
| 2026-05-18 12:00 |
03:31:01.25 |
+24:32:41.5 |
HIP 16305 |
11.58 |
| 2026-05-19 00:00 |
03:31:57.22 |
+24:36:15.9 |
HIP 16305 |
24.80 |
| 2026-05-19 12:00 |
03:32:53.32 |
+24:39:49.7 |
HIP 16635 |
20.28 |
| 2026-05-20 00:00 |
03:33:49.55 |
+24:43:22.8 |
HIP 16635 |
9.88 |
| 2026-05-20 12:00 |
03:34:45.90 |
+24:46:55.3 |
HIP 16635 |
11.64 |
| 2026-05-21 00:00 |
03:35:42.38 |
+24:50:27.1 |
HIP 16635 |
22.94 |
| 2026-05-21 12:00 |
03:36:38.98 |
+24:53:58.3 |
HIP 16805 |
30.29 |
| 2026-05-22 00:00 |
03:37:35.72 |
+24:57:28.7 |
HIP 17037 |
23.95 |
| 2026-05-22 12:00 |
03:38:32.58 |
+25:00:58.5 |
HIP 17037 |
11.55 |
| 2026-05-23 00:00 |
03:39:29.57 |
+25:04:27.6 |
HIP 17037 |
7.05 |
| 2026-05-23 12:00 |
03:40:26.68 |
+25:07:56.0 |
HIP 17181 |
12.64 |
| 2026-05-24 00:00 |
03:41:23.93 |
+25:11:23.7 |
HIP 17181 |
11.94 |
| 2026-05-24 12:00 |
03:42:21.30 |
+25:14:50.7 |
HIP 17403 |
21.05 |
| 2026-05-25 00:00 |
03:43:18.79 |
+25:18:16.9 |
HIP 17403 |
14.52 |
| 2026-05-25 12:00 |
03:44:16.42 |
+25:21:42.4 |
HIP 17403 |
18.46 |
| 2026-05-26 00:00 |
03:45:14.17 |
+25:25:07.2 |
HIP 17583 |
10.22 |
| 2026-05-26 12:00 |
03:46:12.06 |
+25:28:31.2 |
HIP 17583 |
5.45 |
| 2026-05-27 00:00 |
03:47:10.07 |
+25:31:54.4 |
HIP 17729 |
12.06 |
| 2026-05-27 12:00 |
03:48:08.21 |
+25:35:16.8 |
HIP 17729 |
13.06 |
| 2026-05-28 00:00 |
03:49:06.47 |
+25:38:38.5 |
HIP 17812 |
10.91 |
| 2026-05-28 12:00 |
03:50:04.87 |
+25:41:59.4 |
HIP 17954 |
7.88 |
| 2026-05-29 00:00 |
03:51:03.40 |
+25:45:19.5 |
HIP 17954 |
14.55 |
| 2026-05-29 12:00 |
03:52:02.05 |
+25:48:38.8 |
HIP 18175 |
16.46 |
| 2026-05-30 00:00 |
03:53:00.84 |
+25:51:57.2 |
HIP 18175 |
7.20 |
| 2026-05-30 12:00 |
03:53:59.75 |
+25:55:14.9 |
HIP 18194 |
13.04 |
| 2026-05-31 00:00 |
03:54:58.80 |
+25:58:31.7 |
HIP 18194 |
24.46 |
| 2026-05-31 12:00 |
03:55:57.98 |
+26:01:47.7 |
HIP 18273 |
35.41 |
| 2026-06-01 00:00 |
03:56:57.28 |
+26:05:02.8 |
HIP 18630 |
32.11 |
| 2026-06-01 12:00 |
03:57:56.72 |
+26:08:17.0 |
HIP 18630 |
18.42 |
| 2026-06-02 00:00 |
03:58:56.29 |
+26:11:30.4 |
HIP 18630 |
4.93 |