メタデータ
| 項目 |
値 |
| 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 |
オスキュレーティング軌道要素
| 項目 |
値 |
| 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 |
等級
散乱 + 全体線形
$$
M_a = (15.086 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.086 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| k |
1.000 |
| δ90 |
10.000 |
| パラメータ |
記号 |
範囲 |
説明 |
| 太陽・地球距離が1 AUのときの絶対等級 |
H0 |
-5 to 20 |
彗星の固有の明るさ |
| 測光スロープパラメータ |
n |
2 to 6 |
太陽距離に対する明るさ変化率 |
| 前方散乱非対称係数 |
gf |
0.8 to 1 |
前方散乱の強さ |
| 後方散乱非対称係数 |
gb |
-1 to -0.5 |
後方散乱の強さ |
| 分配係数 |
k |
0.8 to 1 |
前方/後方散乱の寄与比 |
| ダスト/ガス明るさ比 |
δ90 |
1 to 10 |
ダスト散乱とガス放射の相対寄与 |
参考: EPSC-DPS2025-160
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
05:37:27.66 |
+37:59:17.1 |
HIP 26360 |
12.86 |
| 2026-06-01 12:00 |
05:38:43.74 |
+37:58:29.4 |
HIP 26585 |
4.05 |
| 2026-06-02 00:00 |
05:39:59.96 |
+37:57:39.6 |
HIP 26632 |
4.86 |
| 2026-06-02 12:00 |
05:41:16.34 |
+37:56:47.8 |
HIP 26803 |
14.79 |
| 2026-06-03 00:00 |
05:42:32.87 |
+37:55:53.8 |
HIP 26910 |
16.24 |
| 2026-06-03 12:00 |
05:43:49.54 |
+37:54:57.8 |
HIP 26910 |
20.87 |
| 2026-06-04 00:00 |
05:45:06.35 |
+37:53:59.6 |
HIP 27189 |
16.62 |
| 2026-06-04 12:00 |
05:46:23.31 |
+37:52:59.2 |
HIP 27300 |
14.41 |
| 2026-06-05 00:00 |
05:47:40.42 |
+37:51:56.7 |
HIP 27300 |
15.05 |
| 2026-06-05 12:00 |
05:48:57.66 |
+37:50:52.0 |
HIP 27300 |
26.68 |
| 2026-06-06 00:00 |
05:50:15.05 |
+37:49:45.1 |
HIP 27706 |
20.66 |
| 2026-06-06 12:00 |
05:51:32.58 |
+37:48:36.0 |
HIP 27706 |
5.52 |
| 2026-06-07 00:00 |
05:52:50.24 |
+37:47:24.6 |
HIP 27706 |
10.31 |
| 2026-06-07 12:00 |
05:54:08.05 |
+37:46:11.0 |
HIP 27867 |
16.57 |
| 2026-06-08 00:00 |
05:55:25.99 |
+37:44:55.1 |
HIP 27867 |
24.57 |
| 2026-06-08 12:00 |
05:56:44.06 |
+37:43:36.9 |
HIP 28228 |
18.14 |
| 2026-06-09 00:00 |
05:58:02.27 |
+37:42:16.4 |
HIP 28228 |
11.43 |
| 2026-06-09 12:00 |
05:59:20.61 |
+37:40:53.6 |
HIP 28300 |
7.85 |
| 2026-06-10 00:00 |
06:00:39.08 |
+37:39:28.5 |
HIP 28600 |
18.82 |
| 2026-06-10 12:00 |
06:01:57.68 |
+37:38:00.9 |
HIP 28600 |
6.78 |
| 2026-06-11 00:00 |
06:03:16.40 |
+37:36:31.0 |
HIP 28600 |
15.06 |
| 2026-06-11 12:00 |
06:04:35.26 |
+37:34:58.8 |
HIP 28820 |
23.51 |
| 2026-06-12 00:00 |
06:05:54.24 |
+37:33:24.1 |
HIP 28820 |
26.50 |
| 2026-06-12 12:00 |
06:07:13.34 |
+37:31:46.9 |
HIP 29110 |
17.85 |
| 2026-06-13 00:00 |
06:08:32.56 |
+37:30:07.4 |
HIP 29110 |
13.98 |
| 2026-06-13 12:00 |
06:09:51.91 |
+37:28:25.4 |
HIP 29238 |
5.85 |
| 2026-06-14 00:00 |
06:11:11.37 |
+37:26:40.9 |
HIP 29238 |
17.45 |
| 2026-06-14 12:00 |
06:12:30.95 |
+37:24:53.9 |
HIP 29541 |
19.39 |
| 2026-06-15 00:00 |
06:13:50.64 |
+37:23:04.4 |
HIP 29541 |
14.11 |
| 2026-06-15 12:00 |
06:15:10.45 |
+37:21:12.4 |
HIP 29767 |
20.26 |
| 2026-06-16 00:00 |
06:16:30.36 |
+37:19:17.9 |
HIP 29767 |
19.51 |
| 2026-06-16 12:00 |
06:17:50.39 |
+37:17:20.8 |
HIP 30097 |
26.99 |
| 2026-06-17 00:00 |
06:19:10.52 |
+37:15:21.2 |
HIP 30097 |
11.16 |
| 2026-06-17 12:00 |
06:20:30.76 |
+37:13:19.0 |
HIP 30097 |
6.11 |
| 2026-06-18 00:00 |
06:21:51.10 |
+37:11:14.2 |
HIP 30249 |
15.49 |
| 2026-06-18 12:00 |
06:23:11.55 |
+37:09:06.7 |
HIP 30391 |
17.87 |
| 2026-06-19 00:00 |
06:24:32.09 |
+37:06:56.7 |
HIP 30484 |
12.06 |
| 2026-06-19 12:00 |
06:25:52.74 |
+37:04:44.0 |
HIP 30689 |
18.25 |
| 2026-06-20 00:00 |
06:27:13.47 |
+37:02:28.7 |
HIP 30689 |
15.88 |
| 2026-06-20 12:00 |
06:28:34.31 |
+37:00:10.7 |
HIP 30689 |
26.48 |
| 2026-06-21 00:00 |
06:29:55.23 |
+36:57:50.0 |
HIP 30950 |
21.71 |
| 2026-06-21 12:00 |
06:31:16.25 |
+36:55:26.6 |
HIP 31096 |
15.54 |
| 2026-06-22 00:00 |
06:32:37.36 |
+36:53:00.5 |
HIP 31096 |
22.01 |