메타데이터
| 항목 |
값 |
| Designation |
C/1986 P1 (Wilson) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1987-04-20T18:45:50.837760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
671 |
| NEO |
- |
| M1 |
5.300 |
| K1 |
7.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1987-01-29.0000000 |
| e |
1.00031497 |
| q (au) |
1.199648 |
| a (au) |
-3808.824679 |
| i (deg) |
147.119168 |
| Ω (om, deg) |
111.665561 |
| ω (w, deg) |
238.308426 |
| M (ma, deg) |
-0.000343 |
밝기
산란 + 전체 선형
$$
M_a = (5.249 + 3.962\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.249 |
| n |
3.962 |
| gf |
1.000 |
| gb |
-0.519 |
| k |
0.800 |
| 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
잔차 (구간 선형)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 시작일 (UTC) |
끝 (UTC) |
a |
b |
| 1986-08-05 |
1987-04-20 |
+0.9682 |
-0.238 |
| 1987-04-21 |
1987-06-28 |
+2.8094 |
-0.131 |
| 1987-06-28 |
1988-01-13 |
-3.5539 |
+1.400 |
| 1988-01-13 |
1988-09-12 |
+0.4903 |
-0.605 |
log10 r = log10(태양거리/AU), Δ = 지구거리(AU)
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
04:40:30.58 |
+43:43:38.9 |
HIP 21700 |
11.19 |
| 2026-07-29 12:00 |
04:40:31.96 |
+43:43:49.2 |
HIP 21700 |
11.48 |
| 2026-07-30 00:00 |
04:40:33.32 |
+43:43:59.6 |
HIP 21700 |
11.77 |
| 2026-07-30 12:00 |
04:40:34.67 |
+43:44:10.0 |
HIP 21700 |
12.07 |
| 2026-07-31 00:00 |
04:40:36.00 |
+43:44:20.5 |
HIP 21700 |
12.35 |
| 2026-07-31 12:00 |
04:40:37.32 |
+43:44:30.9 |
HIP 21700 |
12.64 |
| 2026-08-01 00:00 |
04:40:38.61 |
+43:44:41.4 |
HIP 21700 |
12.93 |
| 2026-08-01 12:00 |
04:40:39.89 |
+43:44:51.9 |
HIP 21700 |
13.21 |
| 2026-08-02 00:00 |
04:40:41.16 |
+43:45:02.4 |
HIP 21700 |
13.49 |
| 2026-08-02 12:00 |
04:40:42.40 |
+43:45:13.0 |
HIP 21700 |
13.76 |
| 2026-08-03 00:00 |
04:40:43.63 |
+43:45:23.6 |
HIP 21700 |
14.04 |
| 2026-08-03 12:00 |
04:40:44.84 |
+43:45:34.1 |
HIP 21700 |
14.31 |
| 2026-08-04 00:00 |
04:40:46.03 |
+43:45:44.8 |
HIP 21700 |
14.58 |
| 2026-08-04 12:00 |
04:40:47.21 |
+43:45:55.4 |
HIP 21700 |
14.85 |
| 2026-08-05 00:00 |
04:40:48.36 |
+43:46:06.0 |
HIP 21700 |
15.11 |
| 2026-08-05 12:00 |
04:40:49.50 |
+43:46:16.7 |
HIP 21700 |
15.37 |
| 2026-08-06 00:00 |
04:40:50.62 |
+43:46:27.4 |
HIP 21700 |
15.63 |
| 2026-08-06 12:00 |
04:40:51.72 |
+43:46:38.1 |
HIP 21700 |
15.89 |
| 2026-08-07 00:00 |
04:40:52.81 |
+43:46:48.8 |
HIP 21700 |
16.15 |
| 2026-08-07 12:00 |
04:40:53.87 |
+43:46:59.5 |
HIP 21700 |
16.40 |
| 2026-08-08 00:00 |
04:40:54.92 |
+43:47:10.3 |
HIP 21700 |
16.65 |
| 2026-08-08 12:00 |
04:40:55.95 |
+43:47:21.0 |
HIP 21700 |
16.89 |
| 2026-08-09 00:00 |
04:40:56.95 |
+43:47:31.8 |
HIP 21700 |
17.14 |
| 2026-08-09 12:00 |
04:40:57.94 |
+43:47:42.6 |
HIP 21700 |
17.38 |
| 2026-08-10 00:00 |
04:40:58.92 |
+43:47:53.4 |
HIP 21700 |
17.62 |
| 2026-08-10 12:00 |
04:40:59.87 |
+43:48:04.2 |
HIP 21700 |
17.86 |
| 2026-08-11 00:00 |
04:41:00.80 |
+43:48:15.0 |
HIP 21700 |
18.09 |
| 2026-08-11 12:00 |
04:41:01.71 |
+43:48:25.9 |
HIP 21774 |
17.99 |
| 2026-08-12 00:00 |
04:41:02.61 |
+43:48:36.7 |
HIP 21774 |
17.86 |
| 2026-08-12 12:00 |
04:41:03.48 |
+43:48:47.5 |
HIP 21774 |
17.73 |
| 2026-08-13 00:00 |
04:41:04.34 |
+43:48:58.4 |
HIP 21774 |
17.60 |
| 2026-08-13 12:00 |
04:41:05.17 |
+43:49:09.3 |
HIP 21774 |
17.47 |
| 2026-08-14 00:00 |
04:41:05.99 |
+43:49:20.1 |
HIP 21774 |
17.34 |
| 2026-08-14 12:00 |
04:41:06.78 |
+43:49:31.0 |
HIP 21774 |
17.22 |
| 2026-08-15 00:00 |
04:41:07.56 |
+43:49:41.9 |
HIP 21774 |
17.09 |
| 2026-08-15 12:00 |
04:41:08.32 |
+43:49:52.8 |
HIP 21774 |
16.96 |
| 2026-08-16 00:00 |
04:41:09.05 |
+43:50:03.6 |
HIP 21774 |
16.84 |
| 2026-08-16 12:00 |
04:41:09.77 |
+43:50:14.5 |
HIP 21774 |
16.72 |
| 2026-08-17 00:00 |
04:41:10.46 |
+43:50:25.4 |
HIP 21774 |
16.59 |
| 2026-08-17 12:00 |
04:41:11.14 |
+43:50:36.3 |
HIP 21774 |
16.47 |
| 2026-08-18 00:00 |
04:41:11.80 |
+43:50:47.2 |
HIP 21774 |
16.35 |
| 2026-08-18 12:00 |
04:41:12.43 |
+43:50:58.1 |
HIP 21774 |
16.23 |
| 2026-08-19 00:00 |
04:41:13.04 |
+43:51:08.9 |
HIP 21774 |
16.11 |