C/1984 U1 (Shoemaker)
메타데이터
| 항목 |
값 |
| Designation |
C/1984 U1 (Shoemaker) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1984-09-03T10:51:18.192960Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:31Z |
| Obs used |
60 |
| NEO |
- |
| M1 |
8.100 |
| K1 |
7.000 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
1985-06-15.0000000 |
| e |
0.99440837 |
| q (au) |
5.489111 |
| a (au) |
981.666043 |
| i (deg) |
179.212301 |
| Ω (om, deg) |
238.298457 |
| ω (w, deg) |
182.819832 |
| M (ma, deg) |
0.009118 |
밝기
산란 + 전체 선형
$$
M_a = (5.829 + 3.472\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
5.829 |
| n |
3.472 |
| gf |
1.000 |
| gb |
-0.502 |
| 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) |
| 2026-02-03 00:00 |
17:59:40.17 |
-23:50:20.5 |
HIP 88116 |
2.18 |
| 2026-02-03 12:00 |
17:59:41.58 |
-23:50:20.7 |
HIP 88116 |
1.95 |
| 2026-02-04 00:00 |
17:59:42.97 |
-23:50:20.8 |
HIP 88116 |
1.74 |
| 2026-02-04 12:00 |
17:59:44.35 |
-23:50:20.9 |
HIP 88116 |
1.57 |
| 2026-02-05 00:00 |
17:59:45.72 |
-23:50:21.1 |
HIP 88116 |
1.45 |
| 2026-02-05 12:00 |
17:59:47.08 |
-23:50:21.2 |
HIP 88116 |
1.40 |
| 2026-02-06 00:00 |
17:59:48.43 |
-23:50:21.3 |
HIP 88116 |
1.41 |
| 2026-02-06 12:00 |
17:59:49.76 |
-23:50:21.5 |
HIP 88116 |
1.49 |
| 2026-02-07 00:00 |
17:59:51.08 |
-23:50:21.6 |
HIP 88116 |
1.61 |
| 2026-02-07 12:00 |
17:59:52.38 |
-23:50:21.7 |
HIP 88116 |
1.78 |
| 2026-02-08 00:00 |
17:59:53.67 |
-23:50:21.9 |
HIP 88116 |
1.98 |
| 2026-02-08 12:00 |
17:59:54.95 |
-23:50:22.0 |
HIP 88116 |
2.20 |
| 2026-02-09 00:00 |
17:59:56.21 |
-23:50:22.2 |
HIP 88116 |
2.43 |
| 2026-02-09 12:00 |
17:59:57.46 |
-23:50:22.3 |
HIP 88116 |
2.67 |
| 2026-02-10 00:00 |
17:59:58.70 |
-23:50:22.4 |
HIP 88116 |
2.91 |
| 2026-02-10 12:00 |
17:59:59.92 |
-23:50:22.6 |
HIP 88116 |
3.16 |
| 2026-02-11 00:00 |
18:00:01.13 |
-23:50:22.7 |
HIP 88116 |
3.41 |
| 2026-02-11 12:00 |
18:00:02.32 |
-23:50:22.9 |
HIP 88116 |
3.66 |
| 2026-02-12 00:00 |
18:00:03.50 |
-23:50:23.0 |
HIP 88116 |
3.91 |
| 2026-02-12 12:00 |
18:00:04.67 |
-23:50:23.1 |
HIP 88116 |
4.16 |
| 2026-02-13 00:00 |
18:00:05.82 |
-23:50:23.3 |
HIP 88116 |
4.41 |
| 2026-02-13 12:00 |
18:00:06.96 |
-23:50:23.4 |
HIP 88116 |
4.66 |
| 2026-02-14 00:00 |
18:00:08.08 |
-23:50:23.6 |
HIP 88116 |
4.91 |
| 2026-02-14 12:00 |
18:00:09.18 |
-23:50:23.7 |
HIP 88116 |
5.15 |
| 2026-02-15 00:00 |
18:00:10.27 |
-23:50:23.9 |
HIP 88116 |
5.39 |
| 2026-02-15 12:00 |
18:00:11.35 |
-23:50:24.0 |
HIP 88116 |
5.63 |
| 2026-02-16 00:00 |
18:00:12.41 |
-23:50:24.2 |
HIP 88116 |
5.86 |
| 2026-02-16 12:00 |
18:00:13.46 |
-23:50:24.3 |
HIP 88116 |
6.10 |
| 2026-02-17 00:00 |
18:00:14.49 |
-23:50:24.4 |
HIP 88116 |
6.33 |
| 2026-02-17 12:00 |
18:00:15.51 |
-23:50:24.6 |
HIP 88116 |
6.55 |
| 2026-02-18 00:00 |
18:00:16.51 |
-23:50:24.7 |
HIP 88116 |
6.78 |
| 2026-02-18 12:00 |
18:00:17.49 |
-23:50:24.9 |
HIP 88116 |
7.00 |
| 2026-02-19 00:00 |
18:00:18.46 |
-23:50:25.0 |
HIP 88116 |
7.22 |
| 2026-02-19 12:00 |
18:00:19.41 |
-23:50:25.2 |
HIP 88116 |
7.43 |
| 2026-02-20 00:00 |
18:00:20.35 |
-23:50:25.3 |
HIP 88116 |
7.64 |
| 2026-02-20 12:00 |
18:00:21.27 |
-23:50:25.5 |
HIP 88116 |
7.85 |
| 2026-02-21 00:00 |
18:00:22.17 |
-23:50:25.6 |
HIP 88116 |
8.05 |
| 2026-02-21 12:00 |
18:00:23.06 |
-23:50:25.8 |
HIP 88116 |
8.25 |
| 2026-02-22 00:00 |
18:00:23.94 |
-23:50:25.9 |
HIP 88116 |
8.45 |
| 2026-02-22 12:00 |
18:00:24.79 |
-23:50:26.1 |
HIP 88116 |
8.64 |
| 2026-02-23 00:00 |
18:00:25.63 |
-23:50:26.3 |
HIP 88116 |
8.83 |
| 2026-02-23 12:00 |
18:00:26.46 |
-23:50:26.4 |
HIP 88116 |
9.02 |
| 2026-02-24 00:00 |
18:00:27.26 |
-23:50:26.6 |
HIP 88116 |
9.20 |