メタデータ
| 項目 |
値 |
| Designation |
168P/Hergenrother |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2012-10-01T22:24:03.841920Z |
| Orbit solution date (soln_date, UTC) |
2025-11-21T13:43:00Z |
| Obs used |
3377 |
| NEO |
- |
| M1 |
7.000 |
| K1 |
44.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-10-05.0000000 |
| e |
0.60947452 |
| q (au) |
1.415279 |
| a (au) |
3.624038 |
| i (deg) |
21.929366 |
| Ω (om, deg) |
356.477671 |
| ω (w, deg) |
13.919130 |
| M (ma, deg) |
308.150819 |
等級
散乱 + 全体線形
$$
M_a = (14.192 + 5.655\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.192 |
| n |
5.655 |
| gf |
0.917 |
| gb |
-0.534 |
| k |
0.991 |
| δ90 |
3.771 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
02:26:36.86 |
+20:39:48.2 |
HIP 11329 |
25.78 |
| 2026-06-01 12:00 |
02:28:10.45 |
+20:52:40.4 |
HIP 11559 |
21.39 |
| 2026-06-02 00:00 |
02:29:44.20 |
+21:05:29.4 |
HIP 11559 |
12.91 |
| 2026-06-02 12:00 |
02:31:18.10 |
+21:18:15.1 |
HIP 11762 |
8.13 |
| 2026-06-03 00:00 |
02:32:52.16 |
+21:30:57.5 |
HIP 11762 |
17.19 |
| 2026-06-03 12:00 |
02:34:26.37 |
+21:43:36.6 |
HIP 11797 |
35.40 |
| 2026-06-04 00:00 |
02:36:00.74 |
+21:56:12.3 |
HIP 12278 |
30.38 |
| 2026-06-04 12:00 |
02:37:35.27 |
+22:08:44.6 |
HIP 12278 |
11.03 |
| 2026-06-05 00:00 |
02:39:09.95 |
+22:21:13.4 |
HIP 12332 |
24.03 |
| 2026-06-05 12:00 |
02:40:44.79 |
+22:33:38.7 |
HIP 12556 |
21.72 |
| 2026-06-06 00:00 |
02:42:19.78 |
+22:46:00.5 |
HIP 12665 |
18.23 |
| 2026-06-06 12:00 |
02:43:54.93 |
+22:58:18.6 |
HIP 12665 |
17.16 |
| 2026-06-07 00:00 |
02:45:30.24 |
+23:10:33.1 |
HIP 12830 |
13.80 |
| 2026-06-07 12:00 |
02:47:05.70 |
+23:22:43.9 |
HIP 13035 |
16.47 |
| 2026-06-08 00:00 |
02:48:41.32 |
+23:34:51.0 |
HIP 13035 |
16.60 |
| 2026-06-08 12:00 |
02:50:17.09 |
+23:46:54.4 |
HIP 13242 |
6.58 |
| 2026-06-09 00:00 |
02:51:53.01 |
+23:58:53.9 |
HIP 13277 |
19.80 |
| 2026-06-09 12:00 |
02:53:29.09 |
+24:10:49.6 |
HIP 13547 |
24.04 |
| 2026-06-10 00:00 |
02:55:05.31 |
+24:22:41.4 |
HIP 13549 |
17.24 |
| 2026-06-10 12:00 |
02:56:41.69 |
+24:34:29.3 |
HIP 13607 |
20.83 |
| 2026-06-11 00:00 |
02:58:18.22 |
+24:46:13.3 |
HIP 13994 |
38.29 |
| 2026-06-11 12:00 |
02:59:54.90 |
+24:57:53.2 |
HIP 13994 |
17.25 |
| 2026-06-12 00:00 |
03:01:31.72 |
+25:09:29.2 |
HIP 14080 |
2.07 |
| 2026-06-12 12:00 |
03:03:08.70 |
+25:21:01.0 |
HIP 14080 |
26.42 |
| 2026-06-13 00:00 |
03:04:45.81 |
+25:32:28.8 |
HIP 14376 |
19.49 |
| 2026-06-13 12:00 |
03:06:23.08 |
+25:43:52.4 |
HIP 14379 |
14.37 |
| 2026-06-14 00:00 |
03:08:00.48 |
+25:55:11.8 |
HIP 14610 |
21.66 |
| 2026-06-14 12:00 |
03:09:38.03 |
+26:06:27.0 |
HIP 14594 |
21.12 |
| 2026-06-15 00:00 |
03:11:15.71 |
+26:17:38.0 |
HIP 15000 |
28.89 |
| 2026-06-15 12:00 |
03:12:53.54 |
+26:28:44.6 |
HIP 15000 |
8.25 |
| 2026-06-16 00:00 |
03:14:31.50 |
+26:39:47.0 |
HIP 15177 |
20.15 |
| 2026-06-16 12:00 |
03:16:09.59 |
+26:50:45.0 |
HIP 15177 |
8.54 |
| 2026-06-17 00:00 |
03:17:47.82 |
+27:01:38.6 |
HIP 15514 |
28.62 |
| 2026-06-17 12:00 |
03:19:26.18 |
+27:12:27.8 |
HIP 15514 |
10.51 |
| 2026-06-18 00:00 |
03:21:04.67 |
+27:23:12.6 |
HIP 15696 |
19.94 |
| 2026-06-18 12:00 |
03:22:43.29 |
+27:33:52.9 |
HIP 15696 |
7.42 |
| 2026-06-19 00:00 |
03:24:22.04 |
+27:44:28.7 |
HIP 15885 |
12.44 |
| 2026-06-19 12:00 |
03:26:00.91 |
+27:55:00.0 |
HIP 15885 |
18.75 |
| 2026-06-20 00:00 |
03:27:39.90 |
+28:05:26.6 |
HIP 16042 |
40.07 |
| 2026-06-20 12:00 |
03:29:19.02 |
+28:15:48.7 |
HIP 16386 |
39.37 |
| 2026-06-21 00:00 |
03:30:58.26 |
+28:26:06.2 |
HIP 16513 |
22.27 |
| 2026-06-21 12:00 |
03:32:37.61 |
+28:36:19.1 |
HIP 16513 |
14.37 |
| 2026-06-22 00:00 |
03:34:17.08 |
+28:46:27.3 |
HIP 16806 |
29.12 |