메타데이터
| 항목 |
값 |
| Designation |
504P/WISE-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-04-08T22:54:56.698560Z |
| Orbit solution date (soln_date, UTC) |
2025-08-01T17:26:05Z |
| Obs used |
411 |
| NEO |
- |
| M1 |
4.900 |
| K1 |
35.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2010-06-14T16:55:15.628800Z |
| Discovery magnitude (MPC) |
- |
| Discovery observatory (MPC) |
C51 · WISE |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2024-11-02.0000000 |
| e |
0.40602522 |
| q (au) |
2.224152 |
| a (au) |
3.744523 |
| i (deg) |
8.806861 |
| Ω (om, deg) |
221.121771 |
| ω (w, deg) |
308.496922 |
| M (ma, deg) |
338.514665 |
밝기
산란 + 전체 선형
$$
M_a = (11.142 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
11.142 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
18:11:28.87 |
-13:18:16.6 |
HIP 89079 |
21.32 |
| 2026-07-29 12:00 |
18:11:15.12 |
-13:18:55.1 |
HIP 89079 |
20.57 |
| 2026-07-30 00:00 |
18:11:01.62 |
-13:19:34.2 |
HIP 89013 |
19.58 |
| 2026-07-30 12:00 |
18:10:48.37 |
-13:20:13.7 |
HIP 89013 |
16.84 |
| 2026-07-31 00:00 |
18:10:35.37 |
-13:20:53.6 |
HIP 89013 |
14.36 |
| 2026-07-31 12:00 |
18:10:22.63 |
-13:21:34.1 |
HIP 89013 |
12.25 |
| 2026-08-01 00:00 |
18:10:10.14 |
-13:22:15.0 |
HIP 89013 |
10.69 |
| 2026-08-01 12:00 |
18:09:57.90 |
-13:22:56.3 |
HIP 89013 |
9.87 |
| 2026-08-02 00:00 |
18:09:45.92 |
-13:23:38.1 |
HIP 89013 |
9.94 |
| 2026-08-02 12:00 |
18:09:34.21 |
-13:24:20.4 |
HIP 89013 |
10.82 |
| 2026-08-03 00:00 |
18:09:22.75 |
-13:25:03.0 |
HIP 89013 |
12.29 |
| 2026-08-03 12:00 |
18:09:11.55 |
-13:25:46.1 |
HIP 89013 |
14.14 |
| 2026-08-04 00:00 |
18:09:00.61 |
-13:26:29.6 |
HIP 89013 |
16.21 |
| 2026-08-04 12:00 |
18:08:49.94 |
-13:27:13.5 |
HIP 89013 |
18.40 |
| 2026-08-05 00:00 |
18:08:39.54 |
-13:27:57.8 |
HIP 89013 |
20.64 |
| 2026-08-05 12:00 |
18:08:29.40 |
-13:28:42.5 |
HIP 89013 |
22.90 |
| 2026-08-06 00:00 |
18:08:19.52 |
-13:29:27.6 |
HIP 88748 |
24.23 |
| 2026-08-06 12:00 |
18:08:09.92 |
-13:30:13.1 |
HIP 88748 |
22.99 |
| 2026-08-07 00:00 |
18:08:00.58 |
-13:30:58.9 |
HIP 88748 |
22.00 |
| 2026-08-07 12:00 |
18:07:51.51 |
-13:31:45.1 |
HIP 88748 |
21.28 |
| 2026-08-08 00:00 |
18:07:42.72 |
-13:32:31.7 |
HIP 88748 |
20.84 |
| 2026-08-08 12:00 |
18:07:34.19 |
-13:33:18.6 |
HIP 88748 |
20.67 |
| 2026-08-09 00:00 |
18:07:25.94 |
-13:34:05.8 |
HIP 88748 |
20.76 |
| 2026-08-09 12:00 |
18:07:17.96 |
-13:34:53.4 |
HIP 88748 |
21.08 |
| 2026-08-10 00:00 |
18:07:10.26 |
-13:35:41.3 |
HIP 88748 |
21.62 |
| 2026-08-10 12:00 |
18:07:02.83 |
-13:36:29.5 |
HIP 88748 |
22.34 |
| 2026-08-11 00:00 |
18:06:55.68 |
-13:37:18.0 |
HIP 88748 |
23.20 |
| 2026-08-11 12:00 |
18:06:48.80 |
-13:38:06.8 |
HIP 88748 |
24.18 |
| 2026-08-12 00:00 |
18:06:42.21 |
-13:38:55.8 |
HIP 88748 |
25.26 |
| 2026-08-12 12:00 |
18:06:35.88 |
-13:39:45.2 |
HIP 88748 |
26.39 |
| 2026-08-13 00:00 |
18:06:29.84 |
-13:40:34.8 |
HIP 88781 |
27.13 |
| 2026-08-13 12:00 |
18:06:24.08 |
-13:41:24.7 |
HIP 88781 |
27.17 |
| 2026-08-14 00:00 |
18:06:18.59 |
-13:42:14.9 |
HIP 88781 |
27.25 |
| 2026-08-14 12:00 |
18:06:13.39 |
-13:43:05.2 |
HIP 88781 |
27.38 |
| 2026-08-15 00:00 |
18:06:08.46 |
-13:43:55.9 |
HIP 88781 |
27.55 |
| 2026-08-15 12:00 |
18:06:03.82 |
-13:44:46.7 |
HIP 88652 |
27.13 |
| 2026-08-16 00:00 |
18:05:59.45 |
-13:45:37.7 |
HIP 88652 |
26.25 |
| 2026-08-16 12:00 |
18:05:55.36 |
-13:46:29.0 |
HIP 88652 |
25.41 |
| 2026-08-17 00:00 |
18:05:51.55 |
-13:47:20.4 |
HIP 88652 |
24.61 |
| 2026-08-17 12:00 |
18:05:48.02 |
-13:48:12.0 |
HIP 88652 |
23.83 |
| 2026-08-18 00:00 |
18:05:44.77 |
-13:49:03.8 |
HIP 88652 |
23.07 |
| 2026-08-18 12:00 |
18:05:41.79 |
-13:49:55.8 |
HIP 88652 |
22.34 |
| 2026-08-19 00:00 |
18:05:39.09 |
-13:50:48.0 |
HIP 88652 |
21.62 |