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) |
| 2026-03-26 00:00 |
04:32:12.14 |
+43:33:50.0 |
HIP 21175 |
9.63 |
| 2026-03-26 12:00 |
04:32:13.15 |
+43:33:42.4 |
HIP 21175 |
9.72 |
| 2026-03-27 00:00 |
04:32:14.18 |
+43:33:34.9 |
HIP 21175 |
9.81 |
| 2026-03-27 12:00 |
04:32:15.22 |
+43:33:27.4 |
HIP 21175 |
9.91 |
| 2026-03-28 00:00 |
04:32:16.29 |
+43:33:20.1 |
HIP 21175 |
10.01 |
| 2026-03-28 12:00 |
04:32:17.37 |
+43:33:12.8 |
HIP 21175 |
10.11 |
| 2026-03-29 00:00 |
04:32:18.48 |
+43:33:05.5 |
HIP 21175 |
10.21 |
| 2026-03-29 12:00 |
04:32:19.60 |
+43:32:58.4 |
HIP 21175 |
10.32 |
| 2026-03-30 00:00 |
04:32:20.74 |
+43:32:51.3 |
HIP 21175 |
10.43 |
| 2026-03-30 12:00 |
04:32:21.90 |
+43:32:44.3 |
HIP 21175 |
10.54 |
| 2026-03-31 00:00 |
04:32:23.08 |
+43:32:37.4 |
HIP 21175 |
10.65 |
| 2026-03-31 12:00 |
04:32:24.28 |
+43:32:30.5 |
HIP 21175 |
10.77 |
| 2026-04-01 00:00 |
04:32:25.49 |
+43:32:23.7 |
HIP 21175 |
10.89 |
| 2026-04-01 12:00 |
04:32:26.72 |
+43:32:17.0 |
HIP 21175 |
11.02 |
| 2026-04-02 00:00 |
04:32:27.98 |
+43:32:10.4 |
HIP 21175 |
11.15 |
| 2026-04-02 12:00 |
04:32:29.25 |
+43:32:03.8 |
HIP 21175 |
11.28 |
| 2026-04-03 00:00 |
04:32:30.53 |
+43:31:57.4 |
HIP 21175 |
11.41 |
| 2026-04-03 12:00 |
04:32:31.84 |
+43:31:51.0 |
HIP 21175 |
11.55 |
| 2026-04-04 00:00 |
04:32:33.16 |
+43:31:44.6 |
HIP 21175 |
11.69 |
| 2026-04-04 12:00 |
04:32:34.50 |
+43:31:38.4 |
HIP 21175 |
11.84 |
| 2026-04-05 00:00 |
04:32:35.86 |
+43:31:32.2 |
HIP 21175 |
11.98 |
| 2026-04-05 12:00 |
04:32:37.23 |
+43:31:26.1 |
HIP 21175 |
12.14 |
| 2026-04-06 00:00 |
04:32:38.63 |
+43:31:20.1 |
HIP 21175 |
12.29 |
| 2026-04-06 12:00 |
04:32:40.04 |
+43:31:14.2 |
HIP 21175 |
12.45 |
| 2026-04-07 00:00 |
04:32:41.46 |
+43:31:08.3 |
HIP 21175 |
12.61 |
| 2026-04-07 12:00 |
04:32:42.91 |
+43:31:02.5 |
HIP 21175 |
12.78 |
| 2026-04-08 00:00 |
04:32:44.37 |
+43:30:56.8 |
HIP 21175 |
12.95 |
| 2026-04-08 12:00 |
04:32:45.84 |
+43:30:51.2 |
HIP 21175 |
13.12 |
| 2026-04-09 00:00 |
04:32:47.34 |
+43:30:45.7 |
HIP 21175 |
13.30 |
| 2026-04-09 12:00 |
04:32:48.85 |
+43:30:40.2 |
HIP 21175 |
13.48 |
| 2026-04-10 00:00 |
04:32:50.37 |
+43:30:34.8 |
HIP 21175 |
13.66 |
| 2026-04-10 12:00 |
04:32:51.92 |
+43:30:29.5 |
HIP 21175 |
13.85 |
| 2026-04-11 00:00 |
04:32:53.47 |
+43:30:24.3 |
HIP 21175 |
14.04 |
| 2026-04-11 12:00 |
04:32:55.05 |
+43:30:19.2 |
HIP 21175 |
14.23 |
| 2026-04-12 00:00 |
04:32:56.64 |
+43:30:14.1 |
HIP 21175 |
14.43 |
| 2026-04-12 12:00 |
04:32:58.25 |
+43:30:09.2 |
HIP 21175 |
14.63 |
| 2026-04-13 00:00 |
04:32:59.87 |
+43:30:04.3 |
HIP 21175 |
14.83 |
| 2026-04-13 12:00 |
04:33:01.51 |
+43:29:59.5 |
HIP 21175 |
15.04 |
| 2026-04-14 00:00 |
04:33:03.16 |
+43:29:54.8 |
HIP 21175 |
15.25 |
| 2026-04-14 12:00 |
04:33:04.83 |
+43:29:50.1 |
HIP 21175 |
15.47 |
| 2026-04-15 00:00 |
04:33:06.51 |
+43:29:45.6 |
HIP 21175 |
15.69 |
| 2026-04-15 12:00 |
04:33:08.21 |
+43:29:41.1 |
HIP 21175 |
15.91 |
| 2026-04-16 00:00 |
04:33:09.92 |
+43:29:36.7 |
HIP 21175 |
16.13 |