메타데이터
| 항목 |
값 |
| Designation |
C/1987 H1 (Shoemaker) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1986-11-17T00:37:43.749120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:33Z |
| Obs used |
126 |
| NEO |
- |
| M1 |
5.200 |
| K1 |
9.750 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1987-11-03.0000000 |
| e |
1.00321165 |
| q (au) |
5.457290 |
| a (au) |
-1699.216266 |
| i (deg) |
132.485156 |
| Ω (om, deg) |
268.336619 |
| ω (w, deg) |
16.992162 |
| M (ma, deg) |
0.004939 |
밝기
산란 + 전체 선형
$$
M_a = (2.864 + 5.022\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
2.864 |
| n |
5.022 |
| gf |
0.980 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.814 |
| 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) |
| 2026-03-26 00:00 |
06:47:53.10 |
+36:22:57.4 |
HIP 32496 |
11.89 |
| 2026-03-26 12:00 |
06:47:52.72 |
+36:22:49.8 |
HIP 32496 |
11.81 |
| 2026-03-27 00:00 |
06:47:52.37 |
+36:22:42.1 |
HIP 32496 |
11.73 |
| 2026-03-27 12:00 |
06:47:52.03 |
+36:22:34.5 |
HIP 32496 |
11.65 |
| 2026-03-28 00:00 |
06:47:51.72 |
+36:22:26.8 |
HIP 32496 |
11.59 |
| 2026-03-28 12:00 |
06:47:51.42 |
+36:22:19.0 |
HIP 32496 |
11.53 |
| 2026-03-29 00:00 |
06:47:51.15 |
+36:22:11.3 |
HIP 32496 |
11.47 |
| 2026-03-29 12:00 |
06:47:50.90 |
+36:22:03.5 |
HIP 32496 |
11.42 |
| 2026-03-30 00:00 |
06:47:50.67 |
+36:21:55.8 |
HIP 32496 |
11.38 |
| 2026-03-30 12:00 |
06:47:50.46 |
+36:21:48.0 |
HIP 32496 |
11.34 |
| 2026-03-31 00:00 |
06:47:50.27 |
+36:21:40.1 |
HIP 32496 |
11.30 |
| 2026-03-31 12:00 |
06:47:50.10 |
+36:21:32.3 |
HIP 32496 |
11.28 |
| 2026-04-01 00:00 |
06:47:49.95 |
+36:21:24.5 |
HIP 32496 |
11.26 |
| 2026-04-01 12:00 |
06:47:49.83 |
+36:21:16.6 |
HIP 32496 |
11.24 |
| 2026-04-02 00:00 |
06:47:49.72 |
+36:21:08.7 |
HIP 32496 |
11.23 |
| 2026-04-02 12:00 |
06:47:49.64 |
+36:21:00.8 |
HIP 32496 |
11.23 |
| 2026-04-03 00:00 |
06:47:49.57 |
+36:20:52.9 |
HIP 32496 |
11.23 |
| 2026-04-03 12:00 |
06:47:49.53 |
+36:20:44.9 |
HIP 32496 |
11.24 |
| 2026-04-04 00:00 |
06:47:49.51 |
+36:20:37.0 |
HIP 32496 |
11.25 |
| 2026-04-04 12:00 |
06:47:49.51 |
+36:20:29.0 |
HIP 32496 |
11.27 |
| 2026-04-05 00:00 |
06:47:49.53 |
+36:20:21.0 |
HIP 32496 |
11.29 |
| 2026-04-05 12:00 |
06:47:49.57 |
+36:20:13.0 |
HIP 32496 |
11.32 |
| 2026-04-06 00:00 |
06:47:49.63 |
+36:20:05.0 |
HIP 32496 |
11.36 |
| 2026-04-06 12:00 |
06:47:49.71 |
+36:19:57.0 |
HIP 32496 |
11.40 |
| 2026-04-07 00:00 |
06:47:49.82 |
+36:19:48.9 |
HIP 32496 |
11.45 |
| 2026-04-07 12:00 |
06:47:49.94 |
+36:19:40.9 |
HIP 32496 |
11.50 |
| 2026-04-08 00:00 |
06:47:50.08 |
+36:19:32.8 |
HIP 32496 |
11.56 |
| 2026-04-08 12:00 |
06:47:50.25 |
+36:19:24.8 |
HIP 32496 |
11.62 |
| 2026-04-09 00:00 |
06:47:50.43 |
+36:19:16.7 |
HIP 32496 |
11.69 |
| 2026-04-09 12:00 |
06:47:50.64 |
+36:19:08.6 |
HIP 32496 |
11.76 |
| 2026-04-10 00:00 |
06:47:50.86 |
+36:19:00.5 |
HIP 32496 |
11.84 |
| 2026-04-10 12:00 |
06:47:51.11 |
+36:18:52.4 |
HIP 32496 |
11.93 |
| 2026-04-11 00:00 |
06:47:51.38 |
+36:18:44.3 |
HIP 32496 |
12.02 |
| 2026-04-11 12:00 |
06:47:51.67 |
+36:18:36.1 |
HIP 32496 |
12.11 |
| 2026-04-12 00:00 |
06:47:51.97 |
+36:18:28.0 |
HIP 32496 |
12.21 |
| 2026-04-12 12:00 |
06:47:52.30 |
+36:18:19.9 |
HIP 32496 |
12.32 |
| 2026-04-13 00:00 |
06:47:52.65 |
+36:18:11.7 |
HIP 32496 |
12.43 |
| 2026-04-13 12:00 |
06:47:53.02 |
+36:18:03.6 |
HIP 32496 |
12.54 |
| 2026-04-14 00:00 |
06:47:53.41 |
+36:17:55.4 |
HIP 32496 |
12.66 |
| 2026-04-14 12:00 |
06:47:53.82 |
+36:17:47.3 |
HIP 32496 |
12.78 |
| 2026-04-15 00:00 |
06:47:54.25 |
+36:17:39.1 |
HIP 32496 |
12.91 |
| 2026-04-15 12:00 |
06:47:54.69 |
+36:17:30.9 |
HIP 32496 |
13.04 |
| 2026-04-16 00:00 |
06:47:55.16 |
+36:17:22.8 |
HIP 32496 |
13.18 |