메타데이터
| 항목 |
값 |
| Designation |
178P/Hug-Bell |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-07-17T20:43:04.964160Z |
| Orbit solution date (soln_date, UTC) |
2026-07-22T10:30:31Z |
| Obs used |
766 |
| NEO |
- |
| M1 |
13.400 |
| K1 |
10.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2017-11-29.0000000 |
| e |
0.47855317 |
| q (au) |
1.904102 |
| a (au) |
3.651575 |
| i (deg) |
11.008430 |
| Ω (om, deg) |
103.102937 |
| ω (w, deg) |
296.936375 |
| M (ma, deg) |
224.138288 |
밝기
산란 + 전체 선형
$$
M_a = (12.018 + 4.996\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.018 |
| n |
4.996 |
| gf |
1.000 |
| gb |
-0.833 |
| k |
0.999 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
19:46:20.23 |
-25:30:13.4 |
HIP 97186 |
17.36 |
| 2026-07-29 12:00 |
19:45:53.52 |
-25:32:37.9 |
HIP 97186 |
13.87 |
| 2026-07-30 00:00 |
19:45:26.86 |
-25:35:01.5 |
HIP 97186 |
12.94 |
| 2026-07-30 12:00 |
19:45:00.27 |
-25:37:24.2 |
HIP 97186 |
15.03 |
| 2026-07-31 00:00 |
19:44:33.75 |
-25:39:45.9 |
HIP 97186 |
19.16 |
| 2026-07-31 12:00 |
19:44:07.31 |
-25:42:06.6 |
HIP 96971 |
20.05 |
| 2026-08-01 00:00 |
19:43:40.95 |
-25:44:26.3 |
HIP 96971 |
14.49 |
| 2026-08-01 12:00 |
19:43:14.68 |
-25:46:45.0 |
HIP 96971 |
9.98 |
| 2026-08-02 00:00 |
19:42:48.51 |
-25:49:02.6 |
HIP 96971 |
8.36 |
| 2026-08-02 12:00 |
19:42:22.44 |
-25:51:19.2 |
HIP 96971 |
10.93 |
| 2026-08-03 00:00 |
19:41:56.48 |
-25:53:34.8 |
HIP 96971 |
15.73 |
| 2026-08-03 12:00 |
19:41:30.64 |
-25:55:49.2 |
HIP 96971 |
21.28 |
| 2026-08-04 00:00 |
19:41:04.92 |
-25:58:02.6 |
HIP 96971 |
27.08 |
| 2026-08-04 12:00 |
19:40:39.33 |
-26:00:14.8 |
HIP 96635 |
25.53 |
| 2026-08-05 00:00 |
19:40:13.88 |
-26:02:25.9 |
HIP 96635 |
21.13 |
| 2026-08-05 12:00 |
19:39:48.57 |
-26:04:35.8 |
HIP 96635 |
17.79 |
| 2026-08-06 00:00 |
19:39:23.41 |
-26:06:44.6 |
HIP 96635 |
16.14 |
| 2026-08-06 12:00 |
19:38:58.41 |
-26:08:52.2 |
HIP 96605 |
15.16 |
| 2026-08-07 00:00 |
19:38:33.56 |
-26:10:58.5 |
HIP 96605 |
11.25 |
| 2026-08-07 12:00 |
19:38:08.89 |
-26:13:03.7 |
HIP 96605 |
9.69 |
| 2026-08-08 00:00 |
19:37:44.40 |
-26:15:07.7 |
HIP 96605 |
11.44 |
| 2026-08-08 12:00 |
19:37:20.08 |
-26:17:10.4 |
HIP 96605 |
15.35 |
| 2026-08-09 00:00 |
19:36:55.96 |
-26:19:11.9 |
HIP 96605 |
20.16 |
| 2026-08-09 12:00 |
19:36:32.03 |
-26:21:12.1 |
HIP 96605 |
25.32 |
| 2026-08-10 00:00 |
19:36:08.31 |
-26:23:11.0 |
HIP 96409 |
29.14 |
| 2026-08-10 12:00 |
19:35:44.79 |
-26:25:08.6 |
HIP 96409 |
31.37 |
| 2026-08-11 00:00 |
19:35:21.48 |
-26:27:05.0 |
HIP 96409 |
34.35 |
| 2026-08-11 12:00 |
19:34:58.40 |
-26:29:00.0 |
HIP 96130 |
35.51 |
| 2026-08-12 00:00 |
19:34:35.55 |
-26:30:53.8 |
HIP 96130 |
32.52 |
| 2026-08-12 12:00 |
19:34:12.93 |
-26:32:46.2 |
HIP 96130 |
30.25 |
| 2026-08-13 00:00 |
19:33:50.55 |
-26:34:37.2 |
HIP 96130 |
28.84 |
| 2026-08-13 12:00 |
19:33:28.42 |
-26:36:27.0 |
HIP 96130 |
28.38 |
| 2026-08-14 00:00 |
19:33:06.54 |
-26:38:15.4 |
HIP 96130 |
28.88 |
| 2026-08-14 12:00 |
19:32:44.91 |
-26:40:02.4 |
HIP 96130 |
30.26 |
| 2026-08-15 00:00 |
19:32:23.55 |
-26:41:48.1 |
HIP 96130 |
32.39 |
| 2026-08-15 12:00 |
19:32:02.46 |
-26:43:32.4 |
HIP 95865 |
32.98 |
| 2026-08-16 00:00 |
19:31:41.64 |
-26:45:15.3 |
HIP 95865 |
28.08 |
| 2026-08-16 12:00 |
19:31:21.10 |
-26:46:56.9 |
HIP 95865 |
23.27 |
| 2026-08-17 00:00 |
19:31:00.84 |
-26:48:37.1 |
HIP 95865 |
18.57 |
| 2026-08-17 12:00 |
19:30:40.88 |
-26:50:16.0 |
HIP 95865 |
14.02 |
| 2026-08-18 00:00 |
19:30:21.21 |
-26:51:53.4 |
HIP 95865 |
9.71 |
| 2026-08-18 12:00 |
19:30:01.83 |
-26:53:29.5 |
HIP 95865 |
6.04 |
| 2026-08-19 00:00 |
19:29:42.76 |
-26:55:04.1 |
HIP 95865 |
4.57 |