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) |
| 2026-03-26 00:00 |
01:23:40.80 |
-04:15:42.6 |
HIP 6389 |
29.54 |
| 2026-03-26 12:00 |
01:24:04.84 |
-04:12:35.1 |
HIP 6687 |
31.71 |
| 2026-03-27 00:00 |
01:24:28.90 |
-04:09:28.1 |
HIP 6687 |
24.98 |
| 2026-03-27 12:00 |
01:24:52.98 |
-04:06:21.5 |
HIP 6687 |
18.27 |
| 2026-03-28 00:00 |
01:25:17.08 |
-04:03:15.4 |
HIP 6687 |
11.63 |
| 2026-03-28 12:00 |
01:25:41.19 |
-04:00:09.8 |
HIP 6687 |
5.31 |
| 2026-03-29 00:00 |
01:26:05.32 |
-03:57:04.7 |
HIP 6687 |
3.55 |
| 2026-03-29 12:00 |
01:26:29.47 |
-03:54:00.1 |
HIP 6687 |
9.41 |
| 2026-03-30 00:00 |
01:26:53.63 |
-03:50:55.9 |
HIP 6687 |
16.00 |
| 2026-03-30 12:00 |
01:27:17.81 |
-03:47:52.3 |
HIP 6832 |
16.41 |
| 2026-03-31 00:00 |
01:27:42.00 |
-03:44:49.1 |
HIP 6832 |
10.94 |
| 2026-03-31 12:00 |
01:28:06.20 |
-03:41:46.5 |
HIP 6832 |
7.86 |
| 2026-04-01 00:00 |
01:28:30.42 |
-03:38:44.3 |
HIP 6832 |
9.77 |
| 2026-04-01 12:00 |
01:28:54.65 |
-03:35:42.7 |
HIP 6832 |
14.85 |
| 2026-04-02 00:00 |
01:29:18.89 |
-03:32:41.5 |
HIP 6933 |
20.89 |
| 2026-04-02 12:00 |
01:29:43.15 |
-03:29:40.9 |
HIP 6933 |
18.83 |
| 2026-04-03 00:00 |
01:30:07.41 |
-03:26:40.8 |
HIP 6933 |
19.09 |
| 2026-04-03 12:00 |
01:30:31.69 |
-03:23:41.2 |
HIP 6933 |
21.59 |
| 2026-04-04 00:00 |
01:30:55.97 |
-03:20:42.1 |
HIP 6933 |
25.68 |
| 2026-04-04 12:00 |
01:31:20.26 |
-03:17:43.5 |
HIP 6933 |
30.73 |
| 2026-04-05 00:00 |
01:31:44.57 |
-03:14:45.4 |
HIP 7144 |
31.76 |
| 2026-04-05 12:00 |
01:32:08.88 |
-03:11:47.9 |
HIP 7144 |
28.39 |
| 2026-04-06 00:00 |
01:32:33.20 |
-03:08:50.9 |
HIP 7144 |
26.35 |
| 2026-04-06 12:00 |
01:32:57.52 |
-03:05:54.4 |
HIP 7144 |
25.98 |
| 2026-04-07 00:00 |
01:33:21.86 |
-03:02:58.4 |
HIP 7144 |
27.32 |
| 2026-04-07 12:00 |
01:33:46.19 |
-03:00:03.0 |
HIP 7144 |
30.16 |
| 2026-04-08 00:00 |
01:34:10.54 |
-02:57:08.2 |
HIP 7144 |
34.12 |
| 2026-04-08 12:00 |
01:34:34.89 |
-02:54:13.8 |
HIP 7382 |
35.00 |
| 2026-04-09 00:00 |
01:34:59.24 |
-02:51:20.0 |
HIP 7382 |
31.26 |
| 2026-04-09 12:00 |
01:35:23.60 |
-02:48:26.8 |
HIP 7544 |
27.42 |
| 2026-04-10 00:00 |
01:35:47.96 |
-02:45:34.1 |
HIP 7544 |
20.96 |
| 2026-04-10 12:00 |
01:36:12.32 |
-02:42:41.9 |
HIP 7544 |
14.73 |
| 2026-04-11 00:00 |
01:36:36.69 |
-02:39:50.3 |
HIP 7544 |
9.24 |
| 2026-04-11 12:00 |
01:37:01.05 |
-02:36:59.3 |
HIP 7544 |
6.63 |
| 2026-04-12 00:00 |
01:37:25.42 |
-02:34:08.8 |
HIP 7544 |
9.62 |
| 2026-04-12 12:00 |
01:37:49.79 |
-02:31:19.0 |
HIP 7544 |
15.21 |
| 2026-04-13 00:00 |
01:38:14.15 |
-02:28:29.6 |
HIP 7736 |
21.25 |
| 2026-04-13 12:00 |
01:38:38.52 |
-02:25:40.9 |
HIP 7736 |
15.93 |
| 2026-04-14 00:00 |
01:39:02.88 |
-02:22:52.7 |
HIP 7736 |
12.09 |
| 2026-04-14 12:00 |
01:39:27.24 |
-02:20:05.1 |
HIP 7736 |
11.30 |
| 2026-04-15 00:00 |
01:39:51.60 |
-02:17:18.1 |
HIP 7736 |
14.10 |
| 2026-04-15 12:00 |
01:40:15.96 |
-02:14:31.7 |
HIP 7736 |
18.95 |
| 2026-04-16 00:00 |
01:40:40.31 |
-02:11:45.9 |
HIP 7736 |
24.67 |