메타데이터
| 항목 |
값 |
| Designation |
87P/Bus |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-12-19T21:38:08.010240Z |
| Orbit solution date (soln_date, UTC) |
2020-09-28T09:20:31Z |
| Obs used |
667 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
14.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-03-20.0000000 |
| e |
0.38934769 |
| q (au) |
2.101175 |
| a (au) |
3.440869 |
| i (deg) |
2.602394 |
| Ω (om, deg) |
181.889806 |
| ω (w, deg) |
24.756386 |
| M (ma, deg) |
126.793522 |
밝기
산란 + 전체 선형
$$
M_a = (12.080 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
12.080 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.756 |
| k |
0.993 |
| 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) |
| 2026-07-29 00:00 |
07:32:33.28 |
+18:45:54.8 |
HIP 36660 |
23.98 |
| 2026-07-29 12:00 |
07:33:02.16 |
+18:44:50.0 |
HIP 36831 |
20.77 |
| 2026-07-30 00:00 |
07:33:31.02 |
+18:43:44.8 |
HIP 36831 |
14.52 |
| 2026-07-30 12:00 |
07:33:59.85 |
+18:42:39.2 |
HIP 36831 |
9.27 |
| 2026-07-31 00:00 |
07:34:28.65 |
+18:41:33.3 |
HIP 36831 |
7.54 |
| 2026-07-31 12:00 |
07:34:57.43 |
+18:40:27.0 |
HIP 36831 |
11.09 |
| 2026-08-01 00:00 |
07:35:26.18 |
+18:39:20.4 |
HIP 36831 |
16.87 |
| 2026-08-01 12:00 |
07:35:54.91 |
+18:38:13.4 |
HIP 36831 |
23.26 |
| 2026-08-02 00:00 |
07:36:23.60 |
+18:37:06.1 |
HIP 37107 |
23.96 |
| 2026-08-02 12:00 |
07:36:52.27 |
+18:35:58.4 |
HIP 37107 |
21.14 |
| 2026-08-03 00:00 |
07:37:20.91 |
+18:34:50.4 |
HIP 37107 |
20.37 |
| 2026-08-03 12:00 |
07:37:49.52 |
+18:33:42.0 |
HIP 37107 |
21.85 |
| 2026-08-04 00:00 |
07:38:18.10 |
+18:32:33.4 |
HIP 37107 |
25.19 |
| 2026-08-04 12:00 |
07:38:46.65 |
+18:31:24.3 |
HIP 37387 |
24.56 |
| 2026-08-05 00:00 |
07:39:15.17 |
+18:30:15.0 |
HIP 37387 |
18.22 |
| 2026-08-05 12:00 |
07:39:43.66 |
+18:29:05.3 |
HIP 37387 |
12.44 |
| 2026-08-06 00:00 |
07:40:12.11 |
+18:27:55.3 |
HIP 37387 |
8.46 |
| 2026-08-06 12:00 |
07:40:40.53 |
+18:26:45.0 |
HIP 37387 |
9.07 |
| 2026-08-07 00:00 |
07:41:08.92 |
+18:25:34.3 |
HIP 37472 |
11.27 |
| 2026-08-07 12:00 |
07:41:37.27 |
+18:24:23.3 |
HIP 37472 |
9.24 |
| 2026-08-08 00:00 |
07:42:05.59 |
+18:23:12.0 |
HIP 37472 |
11.69 |
| 2026-08-08 12:00 |
07:42:33.87 |
+18:22:00.4 |
HIP 37622 |
14.39 |
| 2026-08-09 00:00 |
07:43:02.12 |
+18:20:48.5 |
HIP 37622 |
10.29 |
| 2026-08-09 12:00 |
07:43:30.32 |
+18:19:36.3 |
HIP 37622 |
9.87 |
| 2026-08-10 00:00 |
07:43:58.49 |
+18:18:23.7 |
HIP 37622 |
13.46 |
| 2026-08-10 12:00 |
07:44:26.62 |
+18:17:10.9 |
HIP 37622 |
18.89 |
| 2026-08-11 00:00 |
07:44:54.71 |
+18:15:57.8 |
HIP 37745 |
20.98 |
| 2026-08-11 12:00 |
07:45:22.76 |
+18:14:44.3 |
HIP 37908 |
19.09 |
| 2026-08-12 00:00 |
07:45:50.76 |
+18:13:30.6 |
HIP 37908 |
17.55 |
| 2026-08-12 12:00 |
07:46:18.73 |
+18:12:16.6 |
HIP 37908 |
18.53 |
| 2026-08-13 00:00 |
07:46:46.65 |
+18:11:02.3 |
HIP 37908 |
21.66 |
| 2026-08-13 12:00 |
07:47:14.53 |
+18:09:47.8 |
HIP 38092 |
19.23 |
| 2026-08-14 00:00 |
07:47:42.36 |
+18:08:32.9 |
HIP 38092 |
15.08 |
| 2026-08-14 12:00 |
07:48:10.15 |
+18:07:17.8 |
HIP 38135 |
11.14 |
| 2026-08-15 00:00 |
07:48:37.89 |
+18:06:02.4 |
HIP 38135 |
6.56 |
| 2026-08-15 12:00 |
07:49:05.58 |
+18:04:46.8 |
HIP 38135 |
7.22 |
| 2026-08-16 00:00 |
07:49:33.23 |
+18:03:30.9 |
HIP 38135 |
12.28 |
| 2026-08-16 12:00 |
07:50:00.83 |
+18:02:14.7 |
HIP 38135 |
18.40 |
| 2026-08-17 00:00 |
07:50:28.38 |
+18:00:58.3 |
HIP 38135 |
24.80 |
| 2026-08-17 12:00 |
07:50:55.87 |
+17:59:41.7 |
HIP 38135 |
31.31 |
| 2026-08-18 00:00 |
07:51:23.32 |
+17:58:24.8 |
HIP 38506 |
29.97 |
| 2026-08-18 12:00 |
07:51:50.72 |
+17:57:07.6 |
HIP 38506 |
24.02 |
| 2026-08-19 00:00 |
07:52:18.07 |
+17:55:50.2 |
HIP 38506 |
18.54 |