메타데이터
| 항목 |
값 |
| Designation |
128P/Shoemaker-Holt 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-10T18:32:09.657600Z |
| Orbit solution date (soln_date, UTC) |
2026-03-09T08:49:55Z |
| Obs used |
847 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
19.500 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2016-02-17.0000000 |
| e |
0.32145501 |
| q (au) |
3.055732 |
| a (au) |
4.503359 |
| i (deg) |
4.363922 |
| Ω (om, deg) |
214.293861 |
| ω (w, deg) |
210.579379 |
| M (ma, deg) |
326.092601 |
밝기
산란 + 전체 선형
$$
M_a = (10.159 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
10.159 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.922 |
| 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) |
| 2026-07-29 00:00 |
05:21:08.31 |
+21:09:38.3 |
HIP 24888 |
14.68 |
| 2026-07-29 12:00 |
05:21:54.38 |
+21:09:51.8 |
HIP 24888 |
25.42 |
| 2026-07-30 00:00 |
05:22:40.38 |
+21:10:04.2 |
HIP 24945 |
35.04 |
| 2026-07-30 12:00 |
05:23:26.29 |
+21:10:15.7 |
HIP 25385 |
33.98 |
| 2026-07-31 00:00 |
05:24:12.13 |
+21:10:26.2 |
HIP 25385 |
23.34 |
| 2026-07-31 12:00 |
05:24:57.89 |
+21:10:35.6 |
HIP 25385 |
12.82 |
| 2026-08-01 00:00 |
05:25:43.57 |
+21:10:44.0 |
HIP 25385 |
3.36 |
| 2026-08-01 12:00 |
05:26:29.17 |
+21:10:51.5 |
HIP 25385 |
9.21 |
| 2026-08-02 00:00 |
05:27:14.69 |
+21:10:57.9 |
HIP 25385 |
19.59 |
| 2026-08-02 12:00 |
05:28:00.13 |
+21:11:03.3 |
HIP 25613 |
16.20 |
| 2026-08-03 00:00 |
05:28:45.48 |
+21:11:07.7 |
HIP 25694 |
10.51 |
| 2026-08-03 12:00 |
05:29:30.75 |
+21:11:11.2 |
HIP 25694 |
8.54 |
| 2026-08-04 00:00 |
05:30:15.93 |
+21:11:13.6 |
HIP 25694 |
16.04 |
| 2026-08-04 12:00 |
05:31:01.03 |
+21:11:15.0 |
HIP 25936 |
17.05 |
| 2026-08-05 00:00 |
05:31:46.04 |
+21:11:15.5 |
HIP 25936 |
9.10 |
| 2026-08-05 12:00 |
05:32:30.96 |
+21:11:14.9 |
HIP 25936 |
9.74 |
| 2026-08-06 00:00 |
05:33:15.79 |
+21:11:13.4 |
HIP 25936 |
18.04 |
| 2026-08-06 12:00 |
05:34:00.53 |
+21:11:10.9 |
HIP 26250 |
21.35 |
| 2026-08-07 00:00 |
05:34:45.17 |
+21:11:07.5 |
HIP 26250 |
11.90 |
| 2026-08-07 12:00 |
05:35:29.73 |
+21:11:03.0 |
HIP 26250 |
6.63 |
| 2026-08-08 00:00 |
05:36:14.19 |
+21:10:57.6 |
HIP 26250 |
12.71 |
| 2026-08-08 12:00 |
05:36:58.55 |
+21:10:51.2 |
HIP 26451 |
9.63 |
| 2026-08-09 00:00 |
05:37:42.82 |
+21:10:43.9 |
HIP 26451 |
2.38 |
| 2026-08-09 12:00 |
05:38:26.99 |
+21:10:35.6 |
HIP 26451 |
11.44 |
| 2026-08-10 00:00 |
05:39:11.06 |
+21:10:26.3 |
HIP 26684 |
16.14 |
| 2026-08-10 12:00 |
05:39:55.02 |
+21:10:16.1 |
HIP 26684 |
8.19 |
| 2026-08-11 00:00 |
05:40:38.89 |
+21:10:05.0 |
HIP 26696 |
8.29 |
| 2026-08-11 12:00 |
05:41:22.65 |
+21:09:52.9 |
HIP 26696 |
15.57 |
| 2026-08-12 00:00 |
05:42:06.30 |
+21:09:39.9 |
HIP 26912 |
16.87 |
| 2026-08-12 12:00 |
05:42:49.85 |
+21:09:25.9 |
HIP 26912 |
13.92 |
| 2026-08-13 00:00 |
05:43:33.30 |
+21:09:11.0 |
HIP 26967 |
16.00 |
| 2026-08-13 12:00 |
05:44:16.63 |
+21:08:55.2 |
HIP 26967 |
20.48 |
| 2026-08-14 00:00 |
05:44:59.85 |
+21:08:38.4 |
HIP 27214 |
17.17 |
| 2026-08-14 12:00 |
05:45:42.97 |
+21:08:20.8 |
HIP 27214 |
10.04 |
| 2026-08-15 00:00 |
05:46:25.97 |
+21:08:02.2 |
HIP 27214 |
10.45 |
| 2026-08-15 12:00 |
05:47:08.85 |
+21:07:42.7 |
HIP 27214 |
17.83 |
| 2026-08-16 00:00 |
05:47:51.62 |
+21:07:22.3 |
HIP 27421 |
16.81 |
| 2026-08-16 12:00 |
05:48:34.28 |
+21:07:01.1 |
HIP 27486 |
9.05 |
| 2026-08-17 00:00 |
05:49:16.82 |
+21:06:38.9 |
HIP 27486 |
1.78 |
| 2026-08-17 12:00 |
05:49:59.24 |
+21:06:15.9 |
HIP 27495 |
9.84 |
| 2026-08-18 00:00 |
05:50:41.54 |
+21:05:51.9 |
HIP 27495 |
19.22 |
| 2026-08-18 12:00 |
05:51:23.72 |
+21:05:27.1 |
HIP 27785 |
20.01 |
| 2026-08-19 00:00 |
05:52:05.78 |
+21:05:01.5 |
HIP 27785 |
10.91 |