メタデータ
| 項目 |
値 |
| Designation |
345P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-07-15T10:40:53.382720Z |
| Orbit solution date (soln_date, UTC) |
2024-10-19T00:12:17Z |
| Obs used |
190 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-08-23.0000000 |
| e |
0.21947831 |
| q (au) |
3.158034 |
| a (au) |
4.046055 |
| i (deg) |
2.724989 |
| Ω (om, deg) |
154.521613 |
| ω (w, deg) |
196.465742 |
| M (ma, deg) |
4.669134 |
等級
散乱 + 全体線形
$$
M_a = (15.190 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.190 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.780 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
05:35:04.23 |
+21:18:07.7 |
HIP 26250 |
5.51 |
| 2026-05-12 12:00 |
05:35:39.08 |
+21:18:38.5 |
HIP 26250 |
2.80 |
| 2026-05-13 00:00 |
05:36:13.97 |
+21:19:08.8 |
HIP 26272 |
9.28 |
| 2026-05-13 12:00 |
05:36:48.92 |
+21:19:38.5 |
HIP 26451 |
16.04 |
| 2026-05-14 00:00 |
05:37:23.91 |
+21:20:07.7 |
HIP 26451 |
12.07 |
| 2026-05-14 12:00 |
05:37:58.95 |
+21:20:36.3 |
HIP 26451 |
12.94 |
| 2026-05-15 00:00 |
05:38:34.04 |
+21:21:04.4 |
HIP 26451 |
17.97 |
| 2026-05-15 12:00 |
05:39:09.18 |
+21:21:32.0 |
HIP 26684 |
15.73 |
| 2026-05-16 00:00 |
05:39:44.36 |
+21:21:59.0 |
HIP 26684 |
8.43 |
| 2026-05-16 12:00 |
05:40:19.59 |
+21:22:25.4 |
HIP 26696 |
4.88 |
| 2026-05-17 00:00 |
05:40:54.86 |
+21:22:51.3 |
HIP 26696 |
8.68 |
| 2026-05-17 12:00 |
05:41:30.17 |
+21:23:16.7 |
HIP 26696 |
16.19 |
| 2026-05-18 00:00 |
05:42:05.53 |
+21:23:41.5 |
HIP 26912 |
10.05 |
| 2026-05-18 12:00 |
05:42:40.93 |
+21:24:05.7 |
HIP 26912 |
1.95 |
| 2026-05-19 00:00 |
05:43:16.36 |
+21:24:29.4 |
HIP 26967 |
1.40 |
| 2026-05-19 12:00 |
05:43:51.84 |
+21:24:52.5 |
HIP 26967 |
6.94 |
| 2026-05-20 00:00 |
05:44:27.35 |
+21:25:15.1 |
HIP 27120 |
9.10 |
| 2026-05-20 12:00 |
05:45:02.91 |
+21:25:37.1 |
HIP 27120 |
3.06 |
| 2026-05-21 00:00 |
05:45:38.49 |
+21:25:58.5 |
HIP 27120 |
8.55 |
| 2026-05-21 12:00 |
05:46:14.12 |
+21:26:19.3 |
HIP 27205 |
7.88 |
| 2026-05-22 00:00 |
05:46:49.78 |
+21:26:39.6 |
HIP 27205 |
13.69 |
| 2026-05-22 12:00 |
05:47:25.47 |
+21:26:59.3 |
HIP 27205 |
21.24 |
| 2026-05-23 00:00 |
05:48:01.20 |
+21:27:18.5 |
HIP 27486 |
25.39 |
| 2026-05-23 12:00 |
05:48:36.96 |
+21:27:37.0 |
HIP 27486 |
21.17 |
| 2026-05-24 00:00 |
05:49:12.75 |
+21:27:55.0 |
HIP 27486 |
19.75 |
| 2026-05-24 12:00 |
05:49:48.57 |
+21:28:12.5 |
HIP 27519 |
21.67 |
| 2026-05-25 00:00 |
05:50:24.42 |
+21:28:29.3 |
HIP 27683 |
17.69 |
| 2026-05-25 12:00 |
05:51:00.30 |
+21:28:45.6 |
HIP 27683 |
9.63 |
| 2026-05-26 00:00 |
05:51:36.21 |
+21:29:01.3 |
HIP 27683 |
3.49 |
| 2026-05-26 12:00 |
05:52:12.14 |
+21:29:16.4 |
HIP 27683 |
8.45 |
| 2026-05-27 00:00 |
05:52:48.11 |
+21:29:30.9 |
HIP 27683 |
16.45 |
| 2026-05-27 12:00 |
05:53:24.10 |
+21:29:44.9 |
HIP 27785 |
21.41 |
| 2026-05-28 00:00 |
05:54:00.11 |
+21:29:58.2 |
HIP 27979 |
15.12 |
| 2026-05-28 12:00 |
05:54:36.16 |
+21:30:11.0 |
HIP 27979 |
8.12 |
| 2026-05-29 00:00 |
05:55:12.22 |
+21:30:23.2 |
HIP 27979 |
6.62 |
| 2026-05-29 12:00 |
05:55:48.31 |
+21:30:34.9 |
HIP 27979 |
12.76 |
| 2026-05-30 00:00 |
05:56:24.43 |
+21:30:45.9 |
HIP 27979 |
20.57 |
| 2026-05-30 12:00 |
05:57:00.56 |
+21:30:56.3 |
HIP 28188 |
28.53 |
| 2026-05-31 00:00 |
05:57:36.72 |
+21:31:06.2 |
HIP 28188 |
27.87 |
| 2026-05-31 12:00 |
05:58:12.90 |
+21:31:15.5 |
HIP 28374 |
20.77 |
| 2026-06-01 00:00 |
05:58:49.10 |
+21:31:24.2 |
HIP 28374 |
12.71 |
| 2026-06-01 12:00 |
05:59:25.33 |
+21:31:32.3 |
HIP 28374 |
5.77 |
| 2026-06-02 00:00 |
06:00:01.57 |
+21:31:39.8 |
HIP 28374 |
6.87 |