메타데이터
| 항목 |
값 |
| Designation |
178P/Hug-Bell |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-07-23T00:23:50.688960Z |
| Orbit solution date (soln_date, UTC) |
2024-08-25T21:12:14Z |
| Obs used |
1037 |
| NEO |
- |
| M1 |
13.200 |
| K1 |
11.250 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2012-11-23.0000000 |
| e |
0.47299053 |
| q (au) |
1.933838 |
| a (au) |
3.669456 |
| i (deg) |
10.975306 |
| Ω (om, deg) |
103.574883 |
| ω (w, deg) |
296.946648 |
| M (ma, deg) |
326.065091 |
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
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
20:20:31.93 |
-21:03:47.1 |
HIP 100201 |
16.84 |
| 2026-06-01 12:00 |
20:20:30.11 |
-21:05:10.1 |
HIP 100201 |
17.07 |
| 2026-06-02 00:00 |
20:20:27.99 |
-21:06:34.4 |
HIP 100201 |
17.36 |
| 2026-06-02 12:00 |
20:20:25.56 |
-21:08:00.0 |
HIP 100201 |
17.73 |
| 2026-06-03 00:00 |
20:20:22.82 |
-21:09:27.1 |
HIP 100201 |
18.19 |
| 2026-06-03 12:00 |
20:20:19.76 |
-21:10:55.5 |
HIP 100201 |
18.74 |
| 2026-06-04 00:00 |
20:20:16.40 |
-21:12:25.4 |
HIP 100201 |
19.39 |
| 2026-06-04 12:00 |
20:20:12.72 |
-21:13:56.6 |
HIP 100201 |
20.13 |
| 2026-06-05 00:00 |
20:20:08.73 |
-21:15:29.1 |
HIP 100201 |
20.98 |
| 2026-06-05 12:00 |
20:20:04.42 |
-21:17:03.1 |
HIP 100201 |
21.94 |
| 2026-06-06 00:00 |
20:19:59.80 |
-21:18:38.4 |
HIP 100394 |
22.62 |
| 2026-06-06 12:00 |
20:19:54.86 |
-21:20:15.1 |
HIP 100394 |
23.33 |
| 2026-06-07 00:00 |
20:19:49.61 |
-21:21:53.2 |
HIP 100394 |
24.26 |
| 2026-06-07 12:00 |
20:19:44.04 |
-21:23:32.7 |
HIP 100394 |
25.38 |
| 2026-06-08 00:00 |
20:19:38.15 |
-21:25:13.5 |
HIP 100394 |
26.70 |
| 2026-06-08 12:00 |
20:19:31.94 |
-21:26:55.7 |
HIP 100394 |
28.20 |
| 2026-06-09 00:00 |
20:19:25.42 |
-21:28:39.2 |
HIP 100062 |
27.91 |
| 2026-06-09 12:00 |
20:19:18.57 |
-21:30:24.1 |
HIP 100062 |
25.55 |
| 2026-06-10 00:00 |
20:19:11.41 |
-21:32:10.4 |
HIP 100062 |
23.12 |
| 2026-06-10 12:00 |
20:19:03.92 |
-21:33:58.0 |
HIP 100062 |
20.62 |
| 2026-06-11 00:00 |
20:18:56.12 |
-21:35:47.0 |
HIP 100062 |
18.05 |
| 2026-06-11 12:00 |
20:18:47.99 |
-21:37:37.2 |
HIP 100062 |
15.41 |
| 2026-06-12 00:00 |
20:18:39.54 |
-21:39:28.9 |
HIP 100062 |
12.71 |
| 2026-06-12 12:00 |
20:18:30.78 |
-21:41:21.8 |
HIP 100062 |
9.94 |
| 2026-06-13 00:00 |
20:18:21.69 |
-21:43:16.1 |
HIP 100062 |
7.11 |
| 2026-06-13 12:00 |
20:18:12.28 |
-21:45:11.6 |
HIP 100062 |
4.24 |
| 2026-06-14 00:00 |
20:18:02.55 |
-21:47:08.5 |
HIP 100062 |
1.48 |
| 2026-06-14 12:00 |
20:17:52.51 |
-21:49:06.6 |
HIP 100062 |
2.12 |
| 2026-06-15 00:00 |
20:17:42.14 |
-21:51:06.0 |
HIP 100062 |
5.12 |
| 2026-06-15 12:00 |
20:17:31.46 |
-21:53:06.7 |
HIP 100062 |
8.28 |
| 2026-06-16 00:00 |
20:17:20.46 |
-21:55:08.6 |
HIP 100062 |
11.53 |
| 2026-06-16 12:00 |
20:17:09.14 |
-21:57:11.8 |
HIP 100067 |
13.41 |
| 2026-06-17 00:00 |
20:16:57.51 |
-21:59:16.2 |
HIP 100067 |
15.84 |
| 2026-06-17 12:00 |
20:16:45.57 |
-22:01:21.8 |
HIP 100067 |
18.65 |
| 2026-06-18 00:00 |
20:16:33.31 |
-22:03:28.6 |
HIP 100067 |
21.73 |
| 2026-06-18 12:00 |
20:16:20.74 |
-22:05:36.6 |
HIP 100067 |
25.00 |
| 2026-06-19 00:00 |
20:16:07.86 |
-22:07:45.7 |
HIP 99745 |
25.88 |
| 2026-06-19 12:00 |
20:15:54.68 |
-22:09:56.0 |
HIP 99745 |
23.51 |
| 2026-06-20 00:00 |
20:15:41.18 |
-22:12:07.4 |
HIP 99745 |
21.48 |
| 2026-06-20 12:00 |
20:15:27.38 |
-22:14:20.0 |
HIP 99745 |
19.93 |
| 2026-06-21 00:00 |
20:15:13.27 |
-22:16:33.7 |
HIP 99745 |
19.03 |
| 2026-06-21 12:00 |
20:14:58.87 |
-22:18:48.4 |
HIP 99745 |
18.92 |
| 2026-06-22 00:00 |
20:14:44.16 |
-22:21:04.2 |
HIP 99745 |
19.64 |