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) |
| 2026-07-29 00:00 |
08:14:54.06 |
+31:34:51.3 |
HIP 40398 |
17.21 |
| 2026-07-29 12:00 |
08:16:17.23 |
+31:28:35.1 |
HIP 40398 |
21.24 |
| 2026-07-30 00:00 |
08:17:40.37 |
+31:22:15.6 |
HIP 40665 |
7.46 |
| 2026-07-30 12:00 |
08:19:03.48 |
+31:15:52.9 |
HIP 40665 |
12.83 |
| 2026-07-31 00:00 |
08:20:26.55 |
+31:09:27.0 |
HIP 40795 |
28.75 |
| 2026-07-31 12:00 |
08:21:49.59 |
+31:02:57.9 |
HIP 41172 |
32.83 |
| 2026-08-01 00:00 |
08:23:12.60 |
+30:56:25.5 |
HIP 41172 |
24.46 |
| 2026-08-01 12:00 |
08:24:35.57 |
+30:49:49.9 |
HIP 41292 |
17.41 |
| 2026-08-02 00:00 |
08:25:58.50 |
+30:43:11.1 |
HIP 41292 |
20.80 |
| 2026-08-02 12:00 |
08:27:21.39 |
+30:36:29.1 |
HIP 41482 |
4.69 |
| 2026-08-03 00:00 |
08:28:44.24 |
+30:29:43.9 |
HIP 41482 |
15.06 |
| 2026-08-03 12:00 |
08:30:07.05 |
+30:22:55.5 |
HIP 41624 |
16.12 |
| 2026-08-04 00:00 |
08:31:29.82 |
+30:16:03.8 |
HIP 41821 |
22.56 |
| 2026-08-04 12:00 |
08:32:52.54 |
+30:09:09.0 |
HIP 41841 |
29.57 |
| 2026-08-05 00:00 |
08:34:15.22 |
+30:02:10.9 |
HIP 42182 |
23.02 |
| 2026-08-05 12:00 |
08:35:37.86 |
+29:55:09.7 |
HIP 42182 |
7.82 |
| 2026-08-06 00:00 |
08:37:00.45 |
+29:48:05.2 |
HIP 42182 |
18.23 |
| 2026-08-06 12:00 |
08:38:22.99 |
+29:40:57.6 |
HIP 42371 |
3.01 |
| 2026-08-07 00:00 |
08:39:45.48 |
+29:33:46.8 |
HIP 42514 |
17.37 |
| 2026-08-07 12:00 |
08:41:07.93 |
+29:26:32.8 |
HIP 42514 |
16.55 |
| 2026-08-08 00:00 |
08:42:30.32 |
+29:19:15.7 |
HIP 42514 |
31.56 |
| 2026-08-08 12:00 |
08:43:52.66 |
+29:11:55.4 |
HIP 42978 |
22.31 |
| 2026-08-09 00:00 |
08:45:14.95 |
+29:04:31.9 |
HIP 42978 |
12.21 |
| 2026-08-09 12:00 |
08:46:37.19 |
+28:57:05.3 |
HIP 43100 |
11.20 |
| 2026-08-10 00:00 |
08:47:59.37 |
+28:49:35.6 |
HIP 43274 |
15.64 |
| 2026-08-10 12:00 |
08:49:21.49 |
+28:42:02.7 |
HIP 43274 |
17.66 |
| 2026-08-11 00:00 |
08:50:43.56 |
+28:34:26.7 |
HIP 43587 |
28.71 |
| 2026-08-11 12:00 |
08:52:05.56 |
+28:26:47.6 |
HIP 43587 |
9.64 |
| 2026-08-12 00:00 |
08:53:27.51 |
+28:19:05.4 |
HIP 43587 |
11.33 |
| 2026-08-12 12:00 |
08:54:49.40 |
+28:11:20.1 |
HIP 43834 |
19.21 |
| 2026-08-13 00:00 |
08:56:11.22 |
+28:03:31.6 |
HIP 43834 |
10.51 |
| 2026-08-13 12:00 |
08:57:32.99 |
+27:55:40.2 |
HIP 43834 |
25.03 |
| 2026-08-14 00:00 |
08:58:54.68 |
+27:47:45.6 |
HIP 44342 |
39.03 |
| 2026-08-14 12:00 |
09:00:16.32 |
+27:39:48.0 |
HIP 44342 |
25.01 |
| 2026-08-15 00:00 |
09:01:37.88 |
+27:31:47.3 |
HIP 44342 |
22.51 |
| 2026-08-15 12:00 |
09:02:59.38 |
+27:23:43.6 |
HIP 44438 |
11.58 |
| 2026-08-16 00:00 |
09:04:20.81 |
+27:15:36.8 |
HIP 44438 |
14.91 |
| 2026-08-16 12:00 |
09:05:42.17 |
+27:07:27.0 |
HIP 44438 |
33.14 |
| 2026-08-17 00:00 |
09:07:03.47 |
+26:59:14.2 |
HIP 44905 |
31.41 |
| 2026-08-17 12:00 |
09:08:24.69 |
+26:50:58.4 |
HIP 44905 |
13.02 |
| 2026-08-18 00:00 |
09:09:45.84 |
+26:42:39.6 |
HIP 44905 |
12.05 |
| 2026-08-18 12:00 |
09:11:06.92 |
+26:34:17.8 |
HIP 45178 |
25.16 |
| 2026-08-19 00:00 |
09:12:27.93 |
+26:25:53.1 |
HIP 45304 |
25.78 |