メタデータ
| 項目 |
値 |
| Designation |
47P/Ashbrook-Jackson |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-10-26T15:38:40.142400Z |
| Orbit solution date (soln_date, UTC) |
2026-04-14T14:49:55Z |
| Obs used |
2384 |
| NEO |
- |
| M1 |
13.100 |
| K1 |
4.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2021-11-29.0000000 |
| e |
0.31853138 |
| q (au) |
2.810020 |
| a (au) |
4.123477 |
| i (deg) |
13.040596 |
| Ω (om, deg) |
356.920741 |
| ω (w, deg) |
357.658335 |
| M (ma, deg) |
191.952899 |
等級
散乱 + 全体線形
$$
M_a = (7.992 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.992 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.741 |
| k |
0.992 |
| 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
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 |
03:00:32.45 |
+24:39:42.2 |
HIP 14080 |
30.61 |
| 2026-06-01 12:00 |
03:01:19.18 |
+24:43:53.1 |
HIP 14080 |
23.79 |
| 2026-06-02 00:00 |
03:02:05.90 |
+24:48:03.4 |
HIP 14080 |
21.34 |
| 2026-06-02 12:00 |
03:02:52.60 |
+24:52:12.9 |
HIP 14080 |
24.56 |
| 2026-06-03 00:00 |
03:03:39.29 |
+24:56:21.8 |
HIP 14376 |
30.83 |
| 2026-06-03 12:00 |
03:04:25.95 |
+25:00:30.0 |
HIP 14376 |
20.21 |
| 2026-06-04 00:00 |
03:05:12.60 |
+25:04:37.4 |
HIP 14376 |
11.15 |
| 2026-06-04 12:00 |
03:05:59.23 |
+25:08:44.2 |
HIP 14376 |
9.87 |
| 2026-06-05 00:00 |
03:06:45.85 |
+25:12:50.3 |
HIP 14376 |
18.07 |
| 2026-06-05 12:00 |
03:07:32.44 |
+25:16:55.6 |
HIP 14548 |
16.71 |
| 2026-06-06 00:00 |
03:08:19.01 |
+25:21:00.3 |
HIP 14621 |
7.32 |
| 2026-06-06 12:00 |
03:09:05.56 |
+25:25:04.3 |
HIP 14621 |
4.42 |
| 2026-06-07 00:00 |
03:09:52.09 |
+25:29:07.5 |
HIP 14621 |
15.46 |
| 2026-06-07 12:00 |
03:10:38.60 |
+25:33:10.1 |
HIP 14621 |
26.68 |
| 2026-06-08 00:00 |
03:11:25.09 |
+25:37:12.0 |
HIP 14984 |
24.21 |
| 2026-06-08 12:00 |
03:12:11.55 |
+25:41:13.1 |
HIP 14984 |
16.51 |
| 2026-06-09 00:00 |
03:12:57.99 |
+25:45:13.6 |
HIP 14984 |
14.52 |
| 2026-06-09 12:00 |
03:13:44.41 |
+25:49:13.4 |
HIP 14984 |
20.00 |
| 2026-06-10 00:00 |
03:14:30.80 |
+25:53:12.4 |
HIP 14984 |
28.96 |
| 2026-06-10 12:00 |
03:15:17.16 |
+25:57:10.8 |
HIP 15238 |
22.83 |
| 2026-06-11 00:00 |
03:16:03.50 |
+26:01:08.4 |
HIP 15238 |
13.10 |
| 2026-06-11 12:00 |
03:16:49.81 |
+26:05:05.4 |
HIP 15238 |
8.39 |
| 2026-06-12 00:00 |
03:17:36.10 |
+26:09:01.6 |
HIP 15300 |
10.33 |
| 2026-06-12 12:00 |
03:18:22.35 |
+26:12:57.1 |
HIP 15300 |
14.63 |
| 2026-06-13 00:00 |
03:19:08.58 |
+26:16:52.0 |
HIP 15300 |
23.81 |
| 2026-06-13 12:00 |
03:19:54.77 |
+26:20:46.1 |
HIP 15300 |
34.11 |
| 2026-06-14 00:00 |
03:20:40.93 |
+26:24:39.5 |
HIP 15575 |
30.99 |
| 2026-06-14 12:00 |
03:21:27.06 |
+26:28:32.2 |
HIP 15575 |
29.21 |
| 2026-06-15 00:00 |
03:22:13.16 |
+26:32:24.2 |
HIP 15760 |
24.55 |
| 2026-06-15 12:00 |
03:22:59.23 |
+26:36:15.4 |
HIP 15760 |
17.85 |
| 2026-06-16 00:00 |
03:23:45.26 |
+26:40:06.0 |
HIP 15760 |
16.61 |
| 2026-06-16 12:00 |
03:24:31.25 |
+26:43:55.9 |
HIP 15760 |
21.76 |
| 2026-06-17 00:00 |
03:25:17.21 |
+26:47:45.0 |
HIP 15760 |
30.17 |
| 2026-06-17 12:00 |
03:26:03.13 |
+26:51:33.4 |
HIP 16090 |
35.35 |
| 2026-06-18 00:00 |
03:26:49.01 |
+26:55:21.1 |
HIP 16090 |
28.37 |
| 2026-06-18 12:00 |
03:27:34.85 |
+26:59:08.1 |
HIP 16090 |
24.44 |
| 2026-06-19 00:00 |
03:28:20.66 |
+27:02:54.4 |
HIP 16090 |
25.04 |
| 2026-06-19 12:00 |
03:29:06.42 |
+27:06:40.0 |
HIP 16382 |
25.66 |
| 2026-06-20 00:00 |
03:29:52.14 |
+27:10:24.9 |
HIP 16382 |
15.90 |
| 2026-06-20 12:00 |
03:30:37.82 |
+27:14:09.1 |
HIP 16382 |
9.07 |
| 2026-06-21 00:00 |
03:31:23.46 |
+27:17:52.5 |
HIP 16382 |
12.08 |
| 2026-06-21 12:00 |
03:32:09.05 |
+27:21:35.2 |
HIP 16411 |
16.64 |
| 2026-06-22 00:00 |
03:32:54.60 |
+27:25:17.3 |
HIP 16411 |
22.69 |