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) |
| 2026-07-29 00:00 |
02:46:22.27 |
+02:42:14.3 |
HIP 12923 |
20.20 |
| 2026-07-29 12:00 |
02:46:30.08 |
+02:42:02.3 |
HIP 12923 |
20.31 |
| 2026-07-30 00:00 |
02:46:37.71 |
+02:41:49.3 |
HIP 12923 |
20.58 |
| 2026-07-30 12:00 |
02:46:45.17 |
+02:41:35.4 |
HIP 12923 |
20.99 |
| 2026-07-31 00:00 |
02:46:52.46 |
+02:41:20.4 |
HIP 12923 |
21.52 |
| 2026-07-31 12:00 |
02:46:59.58 |
+02:41:04.4 |
HIP 12923 |
22.15 |
| 2026-08-01 00:00 |
02:47:06.53 |
+02:40:47.4 |
HIP 12923 |
22.87 |
| 2026-08-01 12:00 |
02:47:13.30 |
+02:40:29.3 |
HIP 12923 |
23.65 |
| 2026-08-02 00:00 |
02:47:19.89 |
+02:40:10.3 |
HIP 12923 |
24.49 |
| 2026-08-02 12:00 |
02:47:26.31 |
+02:39:50.2 |
HIP 12923 |
25.37 |
| 2026-08-03 00:00 |
02:47:32.54 |
+02:39:29.2 |
HIP 12923 |
26.27 |
| 2026-08-03 12:00 |
02:47:38.60 |
+02:39:07.1 |
HIP 12923 |
27.20 |
| 2026-08-04 00:00 |
02:47:44.48 |
+02:38:44.0 |
HIP 12923 |
28.13 |
| 2026-08-04 12:00 |
02:47:50.18 |
+02:38:19.9 |
HIP 12923 |
29.07 |
| 2026-08-05 00:00 |
02:47:55.70 |
+02:37:54.8 |
HIP 12923 |
30.00 |
| 2026-08-05 12:00 |
02:48:01.03 |
+02:37:28.6 |
HIP 12923 |
30.92 |
| 2026-08-06 00:00 |
02:48:06.18 |
+02:37:01.5 |
HIP 12923 |
31.83 |
| 2026-08-06 12:00 |
02:48:11.15 |
+02:36:33.3 |
HIP 12923 |
32.73 |
| 2026-08-07 00:00 |
02:48:15.92 |
+02:36:04.2 |
HIP 13234 |
33.02 |
| 2026-08-07 12:00 |
02:48:20.51 |
+02:35:34.0 |
HIP 13234 |
31.77 |
| 2026-08-08 00:00 |
02:48:24.91 |
+02:35:02.8 |
HIP 13234 |
30.57 |
| 2026-08-08 12:00 |
02:48:29.13 |
+02:34:30.6 |
HIP 13234 |
29.42 |
| 2026-08-09 00:00 |
02:48:33.15 |
+02:33:57.4 |
HIP 13234 |
28.30 |
| 2026-08-09 12:00 |
02:48:36.98 |
+02:33:23.2 |
HIP 13234 |
27.23 |
| 2026-08-10 00:00 |
02:48:40.62 |
+02:32:48.0 |
HIP 13234 |
26.21 |
| 2026-08-10 12:00 |
02:48:44.06 |
+02:32:11.8 |
HIP 13234 |
25.23 |
| 2026-08-11 00:00 |
02:48:47.31 |
+02:31:34.6 |
HIP 13234 |
24.31 |
| 2026-08-11 12:00 |
02:48:50.37 |
+02:30:56.4 |
HIP 13234 |
23.44 |
| 2026-08-12 00:00 |
02:48:53.22 |
+02:30:17.2 |
HIP 13234 |
22.62 |
| 2026-08-12 12:00 |
02:48:55.89 |
+02:29:37.0 |
HIP 13234 |
21.86 |
| 2026-08-13 00:00 |
02:48:58.35 |
+02:28:55.8 |
HIP 13234 |
21.17 |
| 2026-08-13 12:00 |
02:49:00.61 |
+02:28:13.7 |
HIP 13234 |
20.54 |
| 2026-08-14 00:00 |
02:49:02.68 |
+02:27:30.6 |
HIP 13234 |
19.98 |
| 2026-08-14 12:00 |
02:49:04.54 |
+02:26:46.4 |
HIP 13234 |
19.49 |
| 2026-08-15 00:00 |
02:49:06.21 |
+02:26:01.4 |
HIP 13234 |
19.09 |
| 2026-08-15 12:00 |
02:49:07.67 |
+02:25:15.3 |
HIP 13234 |
18.76 |
| 2026-08-16 00:00 |
02:49:08.93 |
+02:24:28.3 |
HIP 13234 |
18.52 |
| 2026-08-16 12:00 |
02:49:09.98 |
+02:23:40.4 |
HIP 13234 |
18.37 |
| 2026-08-17 00:00 |
02:49:10.84 |
+02:22:51.5 |
HIP 13234 |
18.31 |
| 2026-08-17 12:00 |
02:49:11.49 |
+02:22:01.6 |
HIP 13234 |
18.35 |
| 2026-08-18 00:00 |
02:49:11.93 |
+02:21:10.8 |
HIP 13234 |
18.47 |
| 2026-08-18 12:00 |
02:49:12.17 |
+02:20:19.1 |
HIP 13234 |
18.69 |
| 2026-08-19 00:00 |
02:49:12.20 |
+02:19:26.4 |
HIP 13234 |
18.99 |