메타데이터
| 항목 |
값 |
| Designation |
137P/Shoemaker-Levy 2 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-12-14T01:58:07.469760Z |
| Orbit solution date (soln_date, UTC) |
2026-06-18T16:12:29Z |
| Obs used |
1230 |
| NEO |
- |
| M1 |
15.400 |
| K1 |
4.500 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2015-12-22.0000000 |
| e |
0.57204950 |
| q (au) |
1.933411 |
| a (au) |
4.517839 |
| i (deg) |
4.850317 |
| Ω (om, deg) |
233.073500 |
| ω (w, deg) |
140.986329 |
| M (ma, deg) |
248.321485 |
밝기
산란 + 전체 선형
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-07-29 00:00 |
14:53:35.17 |
-16:13:59.1 |
HIP 72947 |
16.31 |
| 2026-07-29 12:00 |
14:53:38.13 |
-16:14:03.5 |
HIP 72947 |
15.70 |
| 2026-07-30 00:00 |
14:53:41.27 |
-16:14:08.8 |
HIP 72947 |
15.05 |
| 2026-07-30 12:00 |
14:53:44.60 |
-16:14:14.8 |
HIP 72947 |
14.37 |
| 2026-07-31 00:00 |
14:53:48.11 |
-16:14:21.7 |
HIP 72947 |
13.66 |
| 2026-07-31 12:00 |
14:53:51.81 |
-16:14:29.3 |
HIP 72947 |
12.93 |
| 2026-08-01 00:00 |
14:53:55.68 |
-16:14:37.8 |
HIP 72947 |
12.18 |
| 2026-08-01 12:00 |
14:53:59.75 |
-16:14:47.1 |
HIP 72947 |
11.42 |
| 2026-08-02 00:00 |
14:54:03.99 |
-16:14:57.2 |
HIP 72947 |
10.66 |
| 2026-08-02 12:00 |
14:54:08.42 |
-16:15:08.1 |
HIP 72947 |
9.92 |
| 2026-08-03 00:00 |
14:54:13.02 |
-16:15:19.9 |
HIP 72947 |
9.20 |
| 2026-08-03 12:00 |
14:54:17.81 |
-16:15:32.4 |
HIP 72947 |
8.55 |
| 2026-08-04 00:00 |
14:54:22.78 |
-16:15:45.7 |
HIP 72947 |
8.00 |
| 2026-08-04 12:00 |
14:54:27.93 |
-16:15:59.8 |
HIP 72947 |
7.58 |
| 2026-08-05 00:00 |
14:54:33.26 |
-16:16:14.7 |
HIP 72947 |
7.35 |
| 2026-08-05 12:00 |
14:54:38.77 |
-16:16:30.4 |
HIP 72947 |
7.35 |
| 2026-08-06 00:00 |
14:54:44.46 |
-16:16:46.9 |
HIP 72947 |
7.59 |
| 2026-08-06 12:00 |
14:54:50.33 |
-16:17:04.2 |
HIP 72947 |
8.09 |
| 2026-08-07 00:00 |
14:54:56.38 |
-16:17:22.2 |
HIP 72947 |
8.82 |
| 2026-08-07 12:00 |
14:55:02.61 |
-16:17:41.1 |
HIP 72947 |
9.74 |
| 2026-08-08 00:00 |
14:55:09.01 |
-16:18:00.7 |
HIP 72947 |
10.84 |
| 2026-08-08 12:00 |
14:55:15.59 |
-16:18:21.1 |
HIP 72947 |
12.07 |
| 2026-08-09 00:00 |
14:55:22.35 |
-16:18:42.2 |
HIP 72947 |
13.42 |
| 2026-08-09 12:00 |
14:55:29.29 |
-16:19:04.2 |
HIP 72947 |
14.87 |
| 2026-08-10 00:00 |
14:55:36.40 |
-16:19:26.8 |
HIP 72947 |
16.40 |
| 2026-08-10 12:00 |
14:55:43.69 |
-16:19:50.3 |
HIP 72947 |
18.01 |
| 2026-08-11 00:00 |
14:55:51.15 |
-16:20:14.5 |
HIP 72947 |
19.70 |
| 2026-08-11 12:00 |
14:55:58.79 |
-16:20:39.5 |
HIP 73161 |
19.34 |
| 2026-08-12 00:00 |
14:56:06.60 |
-16:21:05.2 |
HIP 73161 |
17.53 |
| 2026-08-12 12:00 |
14:56:14.59 |
-16:21:31.6 |
HIP 73161 |
15.72 |
| 2026-08-13 00:00 |
14:56:22.75 |
-16:21:58.8 |
HIP 73161 |
13.90 |
| 2026-08-13 12:00 |
14:56:31.08 |
-16:22:26.7 |
HIP 73161 |
12.10 |
| 2026-08-14 00:00 |
14:56:39.59 |
-16:22:55.4 |
HIP 73161 |
10.36 |
| 2026-08-14 12:00 |
14:56:48.26 |
-16:23:24.7 |
HIP 73161 |
8.75 |
| 2026-08-15 00:00 |
14:56:57.11 |
-16:23:54.8 |
HIP 73161 |
7.39 |
| 2026-08-15 12:00 |
14:57:06.13 |
-16:24:25.7 |
HIP 73161 |
6.47 |
| 2026-08-16 00:00 |
14:57:15.31 |
-16:24:57.2 |
HIP 73161 |
6.25 |
| 2026-08-16 12:00 |
14:57:24.67 |
-16:25:29.4 |
HIP 73191 |
6.19 |
| 2026-08-17 00:00 |
14:57:34.19 |
-16:26:02.3 |
HIP 73191 |
5.37 |
| 2026-08-17 12:00 |
14:57:43.88 |
-16:26:36.0 |
HIP 73191 |
5.52 |
| 2026-08-18 00:00 |
14:57:53.74 |
-16:27:10.3 |
HIP 73191 |
6.62 |
| 2026-08-18 12:00 |
14:58:03.76 |
-16:27:45.3 |
HIP 73191 |
8.33 |
| 2026-08-19 00:00 |
14:58:13.95 |
-16:28:21.0 |
HIP 73191 |
10.39 |