메타데이터
| 항목 |
값 |
| Designation |
137P/Shoemaker-Levy 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-12-14T02:22:31.828800Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:05Z |
| Obs used |
1224 |
| NEO |
- |
| M1 |
15.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-12-03.0000000 |
| e |
0.57205656 |
| q (au) |
1.933328 |
| a (au) |
4.517719 |
| i (deg) |
4.850374 |
| Ω (om, deg) |
233.073318 |
| ω (w, deg) |
140.989437 |
| M (ma, deg) |
246.365120 |
밝기
산란 + 전체 선형
$$
M_a = (15.557 + 2.151\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.557 |
| n |
2.151 |
| gf |
0.800 |
| gb |
-0.701 |
| k |
0.941 |
| δ90 |
1.000 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
15:40:54.98 |
-19:55:57.3 |
HIP 76714 |
17.28 |
| 2026-03-26 12:00 |
15:40:48.50 |
-19:55:28.3 |
HIP 76714 |
15.76 |
| 2026-03-27 00:00 |
15:40:41.83 |
-19:54:58.6 |
HIP 76714 |
14.21 |
| 2026-03-27 12:00 |
15:40:34.98 |
-19:54:28.2 |
HIP 76714 |
12.65 |
| 2026-03-28 00:00 |
15:40:27.95 |
-19:53:57.2 |
HIP 76714 |
11.09 |
| 2026-03-28 12:00 |
15:40:20.73 |
-19:53:25.5 |
HIP 76714 |
9.55 |
| 2026-03-29 00:00 |
15:40:13.33 |
-19:52:53.1 |
HIP 76714 |
8.07 |
| 2026-03-29 12:00 |
15:40:05.75 |
-19:52:20.1 |
HIP 76714 |
6.73 |
| 2026-03-30 00:00 |
15:39:57.99 |
-19:51:46.5 |
HIP 76714 |
5.69 |
| 2026-03-30 12:00 |
15:39:50.05 |
-19:51:12.2 |
HIP 76714 |
5.16 |
| 2026-03-31 00:00 |
15:39:41.93 |
-19:50:37.2 |
HIP 76714 |
5.36 |
| 2026-03-31 12:00 |
15:39:33.62 |
-19:50:01.6 |
HIP 76714 |
6.25 |
| 2026-04-01 00:00 |
15:39:25.15 |
-19:49:25.3 |
HIP 76714 |
7.64 |
| 2026-04-01 12:00 |
15:39:16.49 |
-19:48:48.3 |
HIP 76633 |
6.20 |
| 2026-04-02 00:00 |
15:39:07.66 |
-19:48:10.7 |
HIP 76633 |
4.59 |
| 2026-04-02 12:00 |
15:38:58.65 |
-19:47:32.5 |
HIP 76633 |
3.61 |
| 2026-04-03 00:00 |
15:38:49.46 |
-19:46:53.6 |
HIP 76633 |
3.86 |
| 2026-04-03 12:00 |
15:38:40.10 |
-19:46:14.0 |
HIP 76589 |
2.37 |
| 2026-04-04 00:00 |
15:38:30.57 |
-19:45:33.8 |
HIP 76589 |
1.32 |
| 2026-04-04 12:00 |
15:38:20.87 |
-19:44:53.0 |
HIP 76589 |
3.01 |
| 2026-04-05 00:00 |
15:38:10.99 |
-19:44:11.5 |
HIP 76589 |
5.31 |
| 2026-04-05 12:00 |
15:38:00.94 |
-19:43:29.3 |
HIP 76589 |
7.72 |
| 2026-04-06 00:00 |
15:37:50.72 |
-19:42:46.5 |
HIP 76589 |
10.20 |
| 2026-04-06 12:00 |
15:37:40.34 |
-19:42:03.0 |
HIP 76589 |
12.74 |
| 2026-04-07 00:00 |
15:37:29.78 |
-19:41:18.9 |
HIP 76589 |
15.32 |
| 2026-04-07 12:00 |
15:37:19.06 |
-19:40:34.2 |
HIP 76589 |
17.94 |
| 2026-04-08 00:00 |
15:37:08.17 |
-19:39:48.8 |
HIP 76589 |
20.61 |
| 2026-04-08 12:00 |
15:36:57.12 |
-19:39:02.8 |
HIP 76336 |
19.99 |
| 2026-04-09 00:00 |
15:36:45.91 |
-19:38:16.1 |
HIP 76336 |
17.31 |
| 2026-04-09 12:00 |
15:36:34.53 |
-19:37:28.8 |
HIP 76336 |
14.63 |
| 2026-04-10 00:00 |
15:36:22.99 |
-19:36:40.9 |
HIP 76336 |
11.96 |
| 2026-04-10 12:00 |
15:36:11.29 |
-19:35:52.3 |
HIP 76336 |
9.34 |
| 2026-04-11 00:00 |
15:35:59.43 |
-19:35:03.1 |
HIP 76336 |
6.91 |
| 2026-04-11 12:00 |
15:35:47.42 |
-19:34:13.3 |
HIP 76336 |
4.99 |
| 2026-04-12 00:00 |
15:35:35.25 |
-19:33:22.9 |
HIP 76336 |
4.41 |
| 2026-04-12 12:00 |
15:35:22.92 |
-19:32:31.8 |
HIP 76336 |
5.67 |
| 2026-04-13 00:00 |
15:35:10.44 |
-19:31:40.1 |
HIP 76336 |
7.98 |
| 2026-04-13 12:00 |
15:34:57.81 |
-19:30:47.8 |
HIP 76336 |
10.71 |
| 2026-04-14 00:00 |
15:34:45.03 |
-19:29:54.9 |
HIP 76336 |
13.63 |
| 2026-04-14 12:00 |
15:34:32.11 |
-19:29:01.4 |
HIP 76336 |
16.67 |
| 2026-04-15 00:00 |
15:34:19.03 |
-19:28:07.2 |
HIP 76336 |
19.78 |
| 2026-04-15 12:00 |
15:34:05.81 |
-19:27:12.5 |
HIP 76103 |
21.83 |
| 2026-04-16 00:00 |
15:33:52.45 |
-19:26:17.2 |
HIP 76103 |
18.59 |