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
$$
M_a = (19.157 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
19.157 |
| n |
6.000 |
| gf |
0.876 |
| gb |
-0.998 |
| k |
0.935 |
| δ90 |
6.855 |
| 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) |
| 2026-09-20 00:00 |
08:24:37.02 |
+27:17:53.2 |
HIP 41096 |
24.23 |
| 2026-09-20 12:00 |
08:25:57.97 |
+27:14:06.4 |
HIP 41404 |
21.04 |
| 2026-09-21 00:00 |
08:27:18.93 |
+27:10:17.0 |
HIP 41404 |
15.83 |
| 2026-09-21 12:00 |
08:28:39.91 |
+27:06:25.1 |
HIP 41469 |
21.86 |
| 2026-09-22 00:00 |
08:30:00.90 |
+27:02:30.5 |
HIP 41469 |
35.33 |
| 2026-09-22 12:00 |
08:31:21.90 |
+26:58:33.3 |
HIP 41999 |
37.52 |
| 2026-09-23 00:00 |
08:32:42.90 |
+26:54:33.5 |
HIP 41999 |
28.88 |
| 2026-09-23 12:00 |
08:34:03.92 |
+26:50:31.1 |
HIP 41999 |
30.72 |
| 2026-09-24 00:00 |
08:35:24.95 |
+26:46:26.2 |
HIP 41999 |
41.72 |
| 2026-09-24 12:00 |
08:36:45.99 |
+26:42:18.6 |
HIP 42326 |
31.16 |
| 2026-09-25 00:00 |
08:38:07.03 |
+26:38:08.4 |
HIP 42326 |
24.31 |
| 2026-09-25 12:00 |
08:39:28.08 |
+26:33:55.6 |
HIP 42326 |
30.05 |
| 2026-09-26 00:00 |
08:40:49.13 |
+26:29:40.2 |
HIP 42746 |
36.62 |
| 2026-09-26 12:00 |
08:42:10.19 |
+26:25:22.2 |
HIP 42746 |
23.20 |
| 2026-09-27 00:00 |
08:43:31.25 |
+26:21:01.6 |
HIP 42746 |
20.77 |
| 2026-09-27 12:00 |
08:44:52.32 |
+26:16:38.4 |
HIP 42891 |
15.98 |
| 2026-09-28 00:00 |
08:46:13.39 |
+26:12:12.6 |
HIP 42891 |
26.06 |
| 2026-09-28 12:00 |
08:47:34.46 |
+26:07:44.2 |
HIP 43378 |
37.38 |
| 2026-09-29 00:00 |
08:48:55.53 |
+26:03:13.3 |
HIP 43378 |
24.57 |
| 2026-09-29 12:00 |
08:50:16.60 |
+25:58:39.7 |
HIP 43378 |
22.65 |
| 2026-09-30 00:00 |
08:51:37.67 |
+25:54:03.6 |
HIP 43532 |
11.33 |
| 2026-09-30 12:00 |
08:52:58.74 |
+25:49:24.8 |
HIP 43535 |
14.55 |
| 2026-10-01 00:00 |
08:54:19.81 |
+25:44:43.5 |
HIP 43766 |
28.42 |
| 2026-10-01 12:00 |
08:55:40.87 |
+25:39:59.7 |
HIP 43889 |
19.10 |
| 2026-10-02 00:00 |
08:57:01.92 |
+25:35:13.2 |
HIP 43889 |
13.94 |
| 2026-10-02 12:00 |
08:58:22.97 |
+25:30:24.2 |
HIP 44089 |
8.60 |
| 2026-10-03 00:00 |
08:59:44.01 |
+25:25:32.6 |
HIP 44089 |
12.28 |
| 2026-10-03 12:00 |
09:01:05.05 |
+25:20:38.5 |
HIP 44208 |
27.05 |
| 2026-10-04 00:00 |
09:02:26.07 |
+25:15:41.9 |
HIP 44501 |
24.93 |
| 2026-10-04 12:00 |
09:03:47.08 |
+25:10:42.6 |
HIP 44501 |
8.69 |
| 2026-10-05 00:00 |
09:05:08.08 |
+25:05:40.9 |
HIP 44501 |
15.86 |
| 2026-10-05 12:00 |
09:06:29.07 |
+25:00:36.6 |
HIP 44795 |
20.78 |
| 2026-10-06 00:00 |
09:07:50.04 |
+24:55:29.8 |
HIP 44795 |
6.86 |
| 2026-10-06 12:00 |
09:09:10.99 |
+24:50:20.5 |
HIP 44795 |
19.72 |
| 2026-10-07 00:00 |
09:10:31.93 |
+24:45:08.7 |
HIP 44995 |
31.06 |
| 2026-10-07 12:00 |
09:11:52.85 |
+24:39:54.4 |
HIP 45268 |
31.91 |
| 2026-10-08 00:00 |
09:13:13.75 |
+24:34:37.6 |
HIP 45268 |
17.59 |
| 2026-10-08 12:00 |
09:14:34.62 |
+24:29:18.3 |
HIP 45268 |
18.26 |
| 2026-10-09 00:00 |
09:15:55.48 |
+24:23:56.6 |
HIP 45268 |
33.04 |
| 2026-10-09 12:00 |
09:17:16.31 |
+24:18:32.3 |
HIP 45728 |
28.79 |
| 2026-10-10 00:00 |
09:18:37.12 |
+24:13:05.6 |
HIP 45728 |
14.80 |
| 2026-10-10 12:00 |
09:19:57.90 |
+24:07:36.5 |
HIP 45756 |
17.50 |
| 2026-10-11 00:00 |
09:21:18.66 |
+24:02:04.9 |
HIP 45756 |
30.64 |