메타데이터
| 항목 |
값 |
| Designation |
138P/Shoemaker-Levy 7 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-06-12T06:00:38.257920Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T14:13:33Z |
| Obs used |
134 |
| NEO |
- |
| M1 |
16.700 |
| K1 |
8.250 |
| PC |
- |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2009-10-05.0000000 |
| e |
0.52978979 |
| q (au) |
1.703960 |
| a (au) |
3.623827 |
| i (deg) |
10.079832 |
| Ω (om, deg) |
309.438099 |
| ω (w, deg) |
95.552134 |
| M (ma, deg) |
219.804910 |
밝기
산란 + 전체 선형
$$
M_a = (15.401 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.401 |
| n |
6.000 |
| gf |
0.806 |
| gb |
-0.787 |
| k |
0.954 |
| 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 |
01:45:08.22 |
+18:03:09.9 |
HIP 8075 |
27.25 |
| 2026-03-26 12:00 |
01:46:32.47 |
+18:10:18.5 |
HIP 8303 |
31.26 |
| 2026-03-27 00:00 |
01:47:56.84 |
+18:17:25.5 |
HIP 8303 |
26.42 |
| 2026-03-27 12:00 |
01:49:21.32 |
+18:24:30.7 |
HIP 8654 |
31.62 |
| 2026-03-28 00:00 |
01:50:45.92 |
+18:31:34.1 |
HIP 8654 |
11.04 |
| 2026-03-28 12:00 |
01:52:10.64 |
+18:38:35.8 |
HIP 8654 |
12.18 |
| 2026-03-29 00:00 |
01:53:35.47 |
+18:45:35.7 |
HIP 8832 |
32.06 |
| 2026-03-29 12:00 |
01:55:00.41 |
+18:52:33.8 |
HIP 9012 |
29.55 |
| 2026-03-30 00:00 |
01:56:25.47 |
+18:59:30.0 |
HIP 9119 |
15.78 |
| 2026-03-30 12:00 |
01:57:50.64 |
+19:06:24.3 |
HIP 9119 |
8.18 |
| 2026-03-31 00:00 |
01:59:15.92 |
+19:13:16.8 |
HIP 9379 |
17.99 |
| 2026-03-31 12:00 |
02:00:41.32 |
+19:20:07.3 |
HIP 9379 |
9.14 |
| 2026-04-01 00:00 |
02:02:06.83 |
+19:26:55.9 |
HIP 9511 |
4.89 |
| 2026-04-01 12:00 |
02:03:32.44 |
+19:33:42.6 |
HIP 9511 |
19.71 |
| 2026-04-02 00:00 |
02:04:58.17 |
+19:40:27.2 |
HIP 9654 |
17.70 |
| 2026-04-02 12:00 |
02:06:24.01 |
+19:47:09.8 |
HIP 9654 |
32.54 |
| 2026-04-03 00:00 |
02:07:49.96 |
+19:53:50.4 |
HIP 9959 |
32.55 |
| 2026-04-03 12:00 |
02:09:16.01 |
+20:00:29.0 |
HIP 10088 |
21.35 |
| 2026-04-04 00:00 |
02:10:42.18 |
+20:07:05.4 |
HIP 10088 |
19.61 |
| 2026-04-04 12:00 |
02:12:08.45 |
+20:13:39.8 |
HIP 10318 |
26.59 |
| 2026-04-05 00:00 |
02:13:34.82 |
+20:20:12.0 |
HIP 10494 |
24.33 |
| 2026-04-05 12:00 |
02:15:01.31 |
+20:26:42.0 |
HIP 10494 |
11.39 |
| 2026-04-06 00:00 |
02:16:27.90 |
+20:33:09.9 |
HIP 10494 |
23.95 |
| 2026-04-06 12:00 |
02:17:54.59 |
+20:39:35.6 |
HIP 10494 |
43.86 |
| 2026-04-07 00:00 |
02:19:21.39 |
+20:45:59.1 |
HIP 11032 |
41.77 |
| 2026-04-07 12:00 |
02:20:48.29 |
+20:52:20.4 |
HIP 11032 |
29.24 |
| 2026-04-08 00:00 |
02:22:15.29 |
+20:58:39.4 |
HIP 11076 |
20.57 |
| 2026-04-08 12:00 |
02:23:42.39 |
+21:04:56.1 |
HIP 11076 |
21.08 |
| 2026-04-09 00:00 |
02:25:09.60 |
+21:11:10.5 |
HIP 11315 |
35.16 |
| 2026-04-09 12:00 |
02:26:36.90 |
+21:17:22.6 |
HIP 11315 |
31.24 |
| 2026-04-10 00:00 |
02:28:04.31 |
+21:23:32.3 |
HIP 11559 |
16.94 |
| 2026-04-10 12:00 |
02:29:31.81 |
+21:29:39.7 |
HIP 11584 |
6.84 |
| 2026-04-11 00:00 |
02:30:59.40 |
+21:35:44.6 |
HIP 11762 |
17.37 |
| 2026-04-11 12:00 |
02:32:27.10 |
+21:41:47.2 |
HIP 11797 |
18.96 |
| 2026-04-12 00:00 |
02:33:54.88 |
+21:47:47.3 |
HIP 11797 |
26.98 |
| 2026-04-12 12:00 |
02:35:22.76 |
+21:53:45.0 |
HIP 12017 |
34.60 |
| 2026-04-13 00:00 |
02:36:50.74 |
+21:59:40.2 |
HIP 12278 |
18.44 |
| 2026-04-13 12:00 |
02:38:18.80 |
+22:05:32.9 |
HIP 12278 |
4.80 |
| 2026-04-14 00:00 |
02:39:46.96 |
+22:11:23.1 |
HIP 12332 |
19.18 |
| 2026-04-14 12:00 |
02:41:15.20 |
+22:17:10.7 |
HIP 12556 |
4.35 |
| 2026-04-15 00:00 |
02:42:43.54 |
+22:22:55.8 |
HIP 12556 |
18.79 |
| 2026-04-15 12:00 |
02:44:11.96 |
+22:28:38.3 |
HIP 12811 |
26.76 |
| 2026-04-16 00:00 |
02:45:40.46 |
+22:34:18.2 |
HIP 12998 |
20.34 |