メタデータ
| 項目 |
値 |
| Designation |
209P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-04-30T20:16:24.784320Z |
| Orbit solution date (soln_date, UTC) |
2024-10-05T23:12:39Z |
| Obs used |
2879 |
| NEO |
Yes |
| M1 |
18.100 |
| 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) |
2012-06-09.0000000 |
| e |
0.68144491 |
| q (au) |
0.939590 |
| a (au) |
2.949537 |
| i (deg) |
21.337815 |
| Ω (om, deg) |
62.868525 |
| ω (w, deg) |
152.634859 |
| M (ma, deg) |
225.583149 |
等級
散乱 + 全体線形
$$
M_a = (17.965 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.965 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.542 |
| 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) |
| 2026-09-20 00:00 |
02:41:51.83 |
+00:55:35.9 |
HIP 12508 |
13.38 |
| 2026-09-20 12:00 |
02:41:38.10 |
+00:53:57.9 |
HIP 12508 |
10.13 |
| 2026-09-21 00:00 |
02:41:24.16 |
+00:52:19.5 |
HIP 12508 |
7.39 |
| 2026-09-21 12:00 |
02:41:10.03 |
+00:50:40.8 |
HIP 12508 |
6.00 |
| 2026-09-22 00:00 |
02:40:55.71 |
+00:49:01.8 |
HIP 12508 |
6.92 |
| 2026-09-22 12:00 |
02:40:41.19 |
+00:47:22.5 |
HIP 12508 |
9.56 |
| 2026-09-23 00:00 |
02:40:26.49 |
+00:45:42.9 |
HIP 12508 |
12.94 |
| 2026-09-23 12:00 |
02:40:11.60 |
+00:44:03.1 |
HIP 12508 |
16.65 |
| 2026-09-24 00:00 |
02:39:56.51 |
+00:42:23.1 |
HIP 12508 |
20.54 |
| 2026-09-24 12:00 |
02:39:41.25 |
+00:40:42.8 |
HIP 12387 |
21.23 |
| 2026-09-25 00:00 |
02:39:25.79 |
+00:39:02.3 |
HIP 12387 |
19.34 |
| 2026-09-25 12:00 |
02:39:10.16 |
+00:37:21.6 |
HIP 12387 |
18.26 |
| 2026-09-26 00:00 |
02:38:54.34 |
+00:35:40.8 |
HIP 12387 |
18.16 |
| 2026-09-26 12:00 |
02:38:38.34 |
+00:33:59.8 |
HIP 12324 |
17.33 |
| 2026-09-27 00:00 |
02:38:22.17 |
+00:32:18.6 |
HIP 12324 |
16.45 |
| 2026-09-27 12:00 |
02:38:05.82 |
+00:30:37.3 |
HIP 12324 |
16.74 |
| 2026-09-28 00:00 |
02:37:49.29 |
+00:28:55.9 |
HIP 12166 |
15.38 |
| 2026-09-28 12:00 |
02:37:32.59 |
+00:27:14.4 |
HIP 12166 |
11.36 |
| 2026-09-29 00:00 |
02:37:15.72 |
+00:25:32.8 |
HIP 12166 |
7.83 |
| 2026-09-29 12:00 |
02:36:58.68 |
+00:23:51.2 |
HIP 12166 |
5.90 |
| 2026-09-30 00:00 |
02:36:41.47 |
+00:22:09.4 |
HIP 12166 |
7.10 |
| 2026-09-30 12:00 |
02:36:24.09 |
+00:20:27.7 |
HIP 12166 |
10.45 |
| 2026-10-01 00:00 |
02:36:06.55 |
+00:18:45.9 |
HIP 12166 |
14.58 |
| 2026-10-01 12:00 |
02:35:48.85 |
+00:17:04.2 |
HIP 12166 |
19.00 |
| 2026-10-02 00:00 |
02:35:30.99 |
+00:15:22.4 |
HIP 11962 |
18.35 |
| 2026-10-02 12:00 |
02:35:12.97 |
+00:13:40.7 |
HIP 11962 |
15.04 |
| 2026-10-03 00:00 |
02:34:54.79 |
+00:11:59.0 |
HIP 11962 |
12.70 |
| 2026-10-03 12:00 |
02:34:36.46 |
+00:10:17.4 |
HIP 11962 |
11.96 |
| 2026-10-04 00:00 |
02:34:17.98 |
+00:08:35.9 |
HIP 11962 |
13.13 |
| 2026-10-04 12:00 |
02:33:59.34 |
+00:06:54.5 |
HIP 11883 |
10.94 |
| 2026-10-05 00:00 |
02:33:40.56 |
+00:05:13.2 |
HIP 11883 |
6.79 |
| 2026-10-05 12:00 |
02:33:21.63 |
+00:03:32.1 |
HIP 11883 |
4.71 |
| 2026-10-06 00:00 |
02:33:02.56 |
+00:01:51.1 |
HIP 11883 |
6.99 |
| 2026-10-06 12:00 |
02:32:43.36 |
+00:00:10.3 |
HIP 11883 |
11.28 |
| 2026-10-07 00:00 |
02:32:24.01 |
-00:01:30.2 |
HIP 11883 |
16.07 |
| 2026-10-07 12:00 |
02:32:04.53 |
-00:03:10.6 |
HIP 11883 |
21.04 |
| 2026-10-08 00:00 |
02:31:44.91 |
-00:04:50.7 |
HIP 11649 |
22.11 |
| 2026-10-08 12:00 |
02:31:25.17 |
-00:06:30.6 |
HIP 11649 |
17.20 |
| 2026-10-09 00:00 |
02:31:05.30 |
-00:08:10.1 |
HIP 11649 |
12.51 |
| 2026-10-09 12:00 |
02:30:45.30 |
-00:09:49.4 |
HIP 11649 |
8.44 |
| 2026-10-10 00:00 |
02:30:25.18 |
-00:11:28.3 |
HIP 11649 |
6.42 |
| 2026-10-10 12:00 |
02:30:04.95 |
-00:13:06.9 |
HIP 11649 |
8.21 |
| 2026-10-11 00:00 |
02:29:44.60 |
-00:14:45.2 |
HIP 11649 |
12.27 |