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) |
| 2026-05-12 00:00 |
04:34:55.72 |
+43:27:48.9 |
HIP 21290 |
24.42 |
| 2026-05-12 12:00 |
04:34:58.00 |
+43:27:49.2 |
HIP 21290 |
24.58 |
| 2026-05-13 00:00 |
04:35:00.29 |
+43:27:49.6 |
HIP 21290 |
24.76 |
| 2026-05-13 12:00 |
04:35:02.59 |
+43:27:50.0 |
HIP 21290 |
24.94 |
| 2026-05-14 00:00 |
04:35:04.89 |
+43:27:50.5 |
HIP 21290 |
25.13 |
| 2026-05-14 12:00 |
04:35:07.20 |
+43:27:51.1 |
HIP 21290 |
25.32 |
| 2026-05-15 00:00 |
04:35:09.52 |
+43:27:51.8 |
HIP 21290 |
25.53 |
| 2026-05-15 12:00 |
04:35:11.84 |
+43:27:52.6 |
HIP 21290 |
25.74 |
| 2026-05-16 00:00 |
04:35:14.17 |
+43:27:53.5 |
HIP 21290 |
25.95 |
| 2026-05-16 12:00 |
04:35:16.50 |
+43:27:54.5 |
HIP 21290 |
26.18 |
| 2026-05-17 00:00 |
04:35:18.84 |
+43:27:55.5 |
HIP 21290 |
26.41 |
| 2026-05-17 12:00 |
04:35:21.18 |
+43:27:56.7 |
HIP 21290 |
26.64 |
| 2026-05-18 00:00 |
04:35:23.53 |
+43:27:57.9 |
HIP 21290 |
26.89 |
| 2026-05-18 12:00 |
04:35:25.88 |
+43:27:59.2 |
HIP 21290 |
27.14 |
| 2026-05-19 00:00 |
04:35:28.24 |
+43:28:00.6 |
HIP 21290 |
27.39 |
| 2026-05-19 12:00 |
04:35:30.60 |
+43:28:02.1 |
HIP 21290 |
27.66 |
| 2026-05-20 00:00 |
04:35:32.97 |
+43:28:03.7 |
HIP 21574 |
27.47 |
| 2026-05-20 12:00 |
04:35:35.34 |
+43:28:05.3 |
HIP 21574 |
27.05 |
| 2026-05-21 00:00 |
04:35:37.71 |
+43:28:07.1 |
HIP 21574 |
26.62 |
| 2026-05-21 12:00 |
04:35:40.09 |
+43:28:08.9 |
HIP 21574 |
26.20 |
| 2026-05-22 00:00 |
04:35:42.47 |
+43:28:10.8 |
HIP 21574 |
25.78 |
| 2026-05-22 12:00 |
04:35:44.85 |
+43:28:12.8 |
HIP 21574 |
25.36 |
| 2026-05-23 00:00 |
04:35:47.24 |
+43:28:14.9 |
HIP 21574 |
24.93 |
| 2026-05-23 12:00 |
04:35:49.63 |
+43:28:17.1 |
HIP 21574 |
24.51 |
| 2026-05-24 00:00 |
04:35:52.03 |
+43:28:19.4 |
HIP 21574 |
24.08 |
| 2026-05-24 12:00 |
04:35:54.42 |
+43:28:21.7 |
HIP 21574 |
23.66 |
| 2026-05-25 00:00 |
04:35:56.82 |
+43:28:24.1 |
HIP 21574 |
23.23 |
| 2026-05-25 12:00 |
04:35:59.22 |
+43:28:26.7 |
HIP 21574 |
22.81 |
| 2026-05-26 00:00 |
04:36:01.62 |
+43:28:29.3 |
HIP 21574 |
22.38 |
| 2026-05-26 12:00 |
04:36:04.03 |
+43:28:31.9 |
HIP 21574 |
21.95 |
| 2026-05-27 00:00 |
04:36:06.44 |
+43:28:34.7 |
HIP 21574 |
21.53 |
| 2026-05-27 12:00 |
04:36:08.84 |
+43:28:37.6 |
HIP 21574 |
21.10 |
| 2026-05-28 00:00 |
04:36:11.25 |
+43:28:40.5 |
HIP 21574 |
20.67 |
| 2026-05-28 12:00 |
04:36:13.67 |
+43:28:43.5 |
HIP 21574 |
20.24 |
| 2026-05-29 00:00 |
04:36:16.08 |
+43:28:46.6 |
HIP 21574 |
19.82 |
| 2026-05-29 12:00 |
04:36:18.49 |
+43:28:49.8 |
HIP 21574 |
19.39 |
| 2026-05-30 00:00 |
04:36:20.91 |
+43:28:53.0 |
HIP 21574 |
18.96 |
| 2026-05-30 12:00 |
04:36:23.32 |
+43:28:56.4 |
HIP 21574 |
18.53 |
| 2026-05-31 00:00 |
04:36:25.74 |
+43:28:59.8 |
HIP 21574 |
18.10 |
| 2026-05-31 12:00 |
04:36:28.15 |
+43:29:03.3 |
HIP 21574 |
17.67 |
| 2026-06-01 00:00 |
04:36:30.57 |
+43:29:06.9 |
HIP 21574 |
17.25 |
| 2026-06-01 12:00 |
04:36:32.99 |
+43:29:10.6 |
HIP 21574 |
16.82 |
| 2026-06-02 00:00 |
04:36:35.40 |
+43:29:14.3 |
HIP 21574 |
16.39 |