메타데이터
| 항목 |
값 |
| Designation |
275P/Hermann |
| Type |
P |
| Perihelion (tp_cal, UTC) |
1999-02-19T23:33:43.277760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:12Z |
| Obs used |
155 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
14.750 |
| PC |
0.030 |
Osculating 궤도요소
| 항목 |
값 |
| Epoch (epoch_cal, TDB) |
2004-03-27.0000000 |
| e |
0.71393870 |
| q (au) |
1.649060 |
| a (au) |
5.764709 |
| i (deg) |
21.570958 |
| Ω (om, deg) |
349.270066 |
| ω (w, deg) |
173.139081 |
| M (ma, deg) |
132.593422 |
밝기
산란 + 전체 선형
$$
M_a = (15.086 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
모델 상수
| 항목 |
값 |
| H0 |
15.086 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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
찾아보기
천체력
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
10:36:08.55 |
+15:54:02.3 |
HIP 51897 |
1.77 |
| 2026-09-20 12:00 |
10:37:24.35 |
+15:42:54.0 |
HIP 51897 |
20.06 |
| 2026-09-21 00:00 |
10:38:40.07 |
+15:31:43.7 |
HIP 52126 |
27.66 |
| 2026-09-21 12:00 |
10:39:55.71 |
+15:20:31.6 |
HIP 52242 |
23.81 |
| 2026-09-22 00:00 |
10:41:11.27 |
+15:09:17.5 |
HIP 52242 |
15.98 |
| 2026-09-22 12:00 |
10:42:26.75 |
+14:58:01.6 |
HIP 52481 |
26.06 |
| 2026-09-23 00:00 |
10:43:42.16 |
+14:46:43.9 |
HIP 52481 |
6.38 |
| 2026-09-23 12:00 |
10:44:57.48 |
+14:35:24.3 |
HIP 52481 |
17.94 |
| 2026-09-24 00:00 |
10:46:12.73 |
+14:24:02.9 |
HIP 52689 |
12.73 |
| 2026-09-24 12:00 |
10:47:27.90 |
+14:12:39.7 |
HIP 52824 |
8.66 |
| 2026-09-25 00:00 |
10:48:43.00 |
+14:01:14.8 |
HIP 52824 |
14.91 |
| 2026-09-25 12:00 |
10:49:58.02 |
+13:49:48.2 |
HIP 53075 |
24.83 |
| 2026-09-26 00:00 |
10:51:12.96 |
+13:38:19.8 |
HIP 53075 |
4.91 |
| 2026-09-26 12:00 |
10:52:27.83 |
+13:26:49.7 |
HIP 53097 |
12.61 |
| 2026-09-27 00:00 |
10:53:42.63 |
+13:15:17.9 |
HIP 53233 |
9.56 |
| 2026-09-27 12:00 |
10:54:57.35 |
+13:03:44.5 |
HIP 53388 |
7.84 |
| 2026-09-28 00:00 |
10:56:11.99 |
+12:52:09.4 |
HIP 53388 |
23.51 |
| 2026-09-28 12:00 |
10:57:26.57 |
+12:40:32.7 |
HIP 53633 |
38.33 |
| 2026-09-29 00:00 |
10:58:41.07 |
+12:28:54.4 |
HIP 53716 |
36.85 |
| 2026-09-29 12:00 |
10:59:55.51 |
+12:17:14.5 |
HIP 53859 |
22.41 |
| 2026-09-30 00:00 |
11:01:09.87 |
+12:05:33.1 |
HIP 53859 |
2.95 |
| 2026-09-30 12:00 |
11:02:24.16 |
+11:53:50.1 |
HIP 53859 |
21.20 |
| 2026-10-01 00:00 |
11:03:38.38 |
+11:42:05.6 |
HIP 54055 |
13.00 |
| 2026-10-01 12:00 |
11:04:52.53 |
+11:30:19.7 |
HIP 54186 |
15.80 |
| 2026-10-02 00:00 |
11:06:06.62 |
+11:18:32.2 |
HIP 54186 |
15.66 |
| 2026-10-02 12:00 |
11:07:20.63 |
+11:06:43.4 |
HIP 54351 |
12.13 |
| 2026-10-03 00:00 |
11:08:34.58 |
+10:54:53.1 |
HIP 54351 |
20.39 |
| 2026-10-03 12:00 |
11:09:48.46 |
+10:43:01.4 |
HIP 54596 |
28.44 |
| 2026-10-04 00:00 |
11:11:02.28 |
+10:31:08.3 |
HIP 54556 |
28.33 |
| 2026-10-04 12:00 |
11:12:16.02 |
+10:19:13.9 |
HIP 54817 |
17.04 |
| 2026-10-05 00:00 |
11:13:29.70 |
+10:07:18.2 |
HIP 54760 |
19.18 |
| 2026-10-05 12:00 |
11:14:43.32 |
+09:55:21.1 |
HIP 54927 |
17.78 |
| 2026-10-06 00:00 |
11:15:56.87 |
+09:43:22.8 |
HIP 54978 |
26.27 |
| 2026-10-06 12:00 |
11:17:10.35 |
+09:31:23.2 |
HIP 55058 |
20.88 |
| 2026-10-07 00:00 |
11:18:23.77 |
+09:19:22.5 |
HIP 55263 |
27.80 |
| 2026-10-07 12:00 |
11:19:37.12 |
+09:07:20.5 |
HIP 55488 |
32.98 |
| 2026-10-08 00:00 |
11:20:50.41 |
+08:55:17.3 |
HIP 55511 |
20.36 |
| 2026-10-08 12:00 |
11:22:03.64 |
+08:43:13.0 |
HIP 55511 |
18.70 |
| 2026-10-09 00:00 |
11:23:16.80 |
+08:31:07.6 |
HIP 55625 |
7.50 |
| 2026-10-09 12:00 |
11:24:29.89 |
+08:19:01.0 |
HIP 55625 |
18.45 |
| 2026-10-10 00:00 |
11:25:42.93 |
+08:06:53.4 |
HIP 55751 |
10.65 |
| 2026-10-10 12:00 |
11:26:55.90 |
+07:54:44.8 |
HIP 55751 |
22.59 |
| 2026-10-11 00:00 |
11:28:08.80 |
+07:42:35.1 |
HIP 55988 |
12.32 |