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 |
-0.500 |
| 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) |
| 2026-03-26 00:00 |
03:15:52.29 |
+36:46:20.4 |
HIP 15151 |
19.15 |
| 2026-03-26 12:00 |
03:16:41.47 |
+36:47:15.6 |
HIP 15151 |
25.25 |
| 2026-03-27 00:00 |
03:17:30.88 |
+36:48:11.3 |
HIP 15468 |
23.71 |
| 2026-03-27 12:00 |
03:18:20.52 |
+36:49:07.5 |
HIP 15468 |
13.81 |
| 2026-03-28 00:00 |
03:19:10.40 |
+36:50:04.1 |
HIP 15468 |
4.22 |
| 2026-03-28 12:00 |
03:20:00.51 |
+36:51:01.1 |
HIP 15468 |
6.81 |
| 2026-03-29 00:00 |
03:20:50.85 |
+36:51:58.5 |
HIP 15468 |
16.71 |
| 2026-03-29 12:00 |
03:21:41.41 |
+36:52:56.2 |
HIP 15740 |
15.66 |
| 2026-03-30 00:00 |
03:22:32.21 |
+36:53:54.3 |
HIP 15740 |
7.93 |
| 2026-03-30 12:00 |
03:23:23.24 |
+36:54:52.8 |
HIP 15740 |
9.44 |
| 2026-03-31 00:00 |
03:24:14.49 |
+36:55:51.6 |
HIP 15740 |
18.07 |
| 2026-03-31 12:00 |
03:25:05.98 |
+36:56:50.7 |
HIP 16028 |
15.79 |
| 2026-04-01 00:00 |
03:25:57.69 |
+36:57:50.1 |
HIP 16028 |
5.77 |
| 2026-04-01 12:00 |
03:26:49.63 |
+36:58:49.7 |
HIP 16028 |
5.76 |
| 2026-04-02 00:00 |
03:27:41.80 |
+36:59:49.6 |
HIP 16028 |
15.86 |
| 2026-04-02 12:00 |
03:28:34.19 |
+37:00:49.8 |
HIP 16209 |
22.56 |
| 2026-04-03 00:00 |
03:29:26.81 |
+37:01:50.1 |
HIP 16209 |
22.35 |
| 2026-04-03 12:00 |
03:30:19.66 |
+37:02:50.7 |
HIP 16438 |
23.62 |
| 2026-04-04 00:00 |
03:31:12.73 |
+37:03:51.4 |
HIP 16438 |
17.04 |
| 2026-04-04 12:00 |
03:32:06.03 |
+37:04:52.3 |
HIP 16438 |
15.77 |
| 2026-04-05 00:00 |
03:32:59.56 |
+37:05:53.3 |
HIP 16476 |
19.56 |
| 2026-04-05 12:00 |
03:33:53.31 |
+37:06:54.5 |
HIP 16476 |
25.87 |
| 2026-04-06 00:00 |
03:34:47.29 |
+37:07:55.8 |
HIP 16576 |
31.69 |
| 2026-04-06 12:00 |
03:35:41.49 |
+37:08:57.2 |
HIP 16935 |
31.69 |
| 2026-04-07 00:00 |
03:36:35.91 |
+37:09:58.6 |
HIP 16935 |
22.52 |
| 2026-04-07 12:00 |
03:37:30.56 |
+37:11:00.1 |
HIP 16935 |
15.71 |
| 2026-04-08 00:00 |
03:38:25.44 |
+37:12:01.7 |
HIP 16935 |
14.99 |
| 2026-04-08 12:00 |
03:39:20.54 |
+37:13:03.3 |
HIP 16935 |
21.09 |
| 2026-04-09 00:00 |
03:40:15.86 |
+37:14:04.9 |
HIP 17203 |
23.16 |
| 2026-04-09 12:00 |
03:41:11.40 |
+37:15:06.5 |
HIP 17308 |
13.33 |
| 2026-04-10 00:00 |
03:42:07.17 |
+37:16:08.0 |
HIP 17308 |
2.20 |
| 2026-04-10 12:00 |
03:43:03.17 |
+37:17:09.5 |
HIP 17308 |
9.01 |
| 2026-04-11 00:00 |
03:43:59.38 |
+37:18:11.0 |
HIP 17536 |
16.53 |
| 2026-04-11 12:00 |
03:44:55.82 |
+37:19:12.3 |
HIP 17536 |
6.59 |
| 2026-04-12 00:00 |
03:45:52.48 |
+37:20:13.6 |
HIP 17536 |
8.24 |
| 2026-04-12 12:00 |
03:46:49.36 |
+37:21:14.8 |
HIP 17619 |
13.09 |
| 2026-04-13 00:00 |
03:47:46.46 |
+37:22:15.8 |
HIP 17619 |
20.58 |
| 2026-04-13 12:00 |
03:48:43.78 |
+37:23:16.6 |
HIP 17741 |
27.19 |
| 2026-04-14 00:00 |
03:49:41.32 |
+37:24:17.3 |
HIP 18047 |
20.86 |
| 2026-04-14 12:00 |
03:50:39.09 |
+37:25:17.8 |
HIP 18047 |
9.35 |
| 2026-04-15 00:00 |
03:51:37.07 |
+37:26:18.1 |
HIP 18047 |
2.28 |
| 2026-04-15 12:00 |
03:52:35.27 |
+37:27:18.2 |
HIP 18047 |
13.82 |
| 2026-04-16 00:00 |
03:53:33.70 |
+37:28:18.0 |
HIP 18047 |
25.45 |