メタデータ
| 項目 |
値 |
| Designation |
247P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-01-04T04:06:59.397120Z |
| Orbit solution date (soln_date, UTC) |
2026-10-01T14:42:13Z |
| Obs used |
1353 |
| NEO |
- |
| M1 |
17.900 |
| 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) |
2011-10-21.0000000 |
| e |
0.62564467 |
| q (au) |
1.484366 |
| a (au) |
3.965125 |
| i (deg) |
13.682518 |
| Ω (om, deg) |
54.122109 |
| ω (w, deg) |
47.340422 |
| M (ma, deg) |
36.179266 |
等級
散乱 + 全体線形
$$
M_a = (16.617 + 4.981\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
16.617 |
| n |
4.981 |
| gf |
0.998 |
| gb |
-0.519 |
| 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) |
| 2026-09-25 00:00 |
07:59:10.18 |
+26:18:29.3 |
HIP 38985 |
18.42 |
| 2026-09-25 12:00 |
08:00:56.66 |
+26:18:05.1 |
HIP 39306 |
26.17 |
| 2026-09-26 00:00 |
08:02:43.18 |
+26:17:37.4 |
HIP 39401 |
8.07 |
| 2026-09-26 12:00 |
08:04:29.71 |
+26:17:06.1 |
HIP 39401 |
16.00 |
| 2026-09-27 00:00 |
08:06:16.27 |
+26:16:31.3 |
HIP 39603 |
13.47 |
| 2026-09-27 12:00 |
08:08:02.85 |
+26:15:52.9 |
HIP 39603 |
34.56 |
| 2026-09-28 00:00 |
08:09:49.43 |
+26:15:10.9 |
HIP 40007 |
25.08 |
| 2026-09-28 12:00 |
08:11:36.03 |
+26:14:25.4 |
HIP 40200 |
14.27 |
| 2026-09-29 00:00 |
08:13:22.63 |
+26:13:36.4 |
HIP 40200 |
9.67 |
| 2026-09-29 12:00 |
08:15:09.22 |
+26:12:43.9 |
HIP 40378 |
31.79 |
| 2026-09-30 00:00 |
08:16:55.82 |
+26:11:47.8 |
HIP 40667 |
20.95 |
| 2026-09-30 12:00 |
08:18:42.40 |
+26:10:48.2 |
HIP 40739 |
9.72 |
| 2026-10-01 00:00 |
08:20:28.96 |
+26:09:45.2 |
HIP 40739 |
23.54 |
| 2026-10-01 12:00 |
08:22:15.51 |
+26:08:38.7 |
HIP 41014 |
13.24 |
| 2026-10-02 00:00 |
08:24:02.04 |
+26:07:28.7 |
HIP 41194 |
20.94 |
| 2026-10-02 12:00 |
08:25:48.53 |
+26:06:15.3 |
HIP 41194 |
29.12 |
| 2026-10-03 00:00 |
08:27:34.99 |
+26:04:58.5 |
HIP 41447 |
21.92 |
| 2026-10-03 12:00 |
08:29:21.42 |
+26:03:38.2 |
HIP 41679 |
10.14 |
| 2026-10-04 00:00 |
08:31:07.80 |
+26:02:14.6 |
HIP 41760 |
2.79 |
| 2026-10-04 12:00 |
08:32:54.13 |
+26:00:47.6 |
HIP 41950 |
16.48 |
| 2026-10-05 00:00 |
08:34:40.41 |
+25:59:17.2 |
HIP 42243 |
27.67 |
| 2026-10-05 12:00 |
08:36:26.63 |
+25:57:43.5 |
HIP 42243 |
3.92 |
| 2026-10-06 00:00 |
08:38:12.79 |
+25:56:06.5 |
HIP 42356 |
6.92 |
| 2026-10-06 12:00 |
08:39:58.89 |
+25:54:26.2 |
HIP 42356 |
26.21 |
| 2026-10-07 00:00 |
08:41:44.91 |
+25:52:42.7 |
HIP 42746 |
16.78 |
| 2026-10-07 12:00 |
08:43:30.85 |
+25:50:55.9 |
HIP 42746 |
16.47 |
| 2026-10-08 00:00 |
08:45:16.71 |
+25:49:05.9 |
HIP 42891 |
16.81 |
| 2026-10-08 12:00 |
08:47:02.49 |
+25:47:12.7 |
HIP 43111 |
19.04 |
| 2026-10-09 00:00 |
08:48:48.17 |
+25:45:16.3 |
HIP 43111 |
31.72 |
| 2026-10-09 12:00 |
08:50:33.75 |
+25:43:16.7 |
HIP 43532 |
18.94 |
| 2026-10-10 00:00 |
08:52:19.24 |
+25:41:14.1 |
HIP 43535 |
4.63 |
| 2026-10-10 12:00 |
08:54:04.62 |
+25:39:08.3 |
HIP 43535 |
28.26 |
| 2026-10-11 00:00 |
08:55:49.89 |
+25:36:59.5 |
HIP 43889 |
15.48 |
| 2026-10-11 12:00 |
08:57:35.05 |
+25:34:47.7 |
HIP 43889 |
19.01 |
| 2026-10-12 00:00 |
08:59:20.08 |
+25:32:32.8 |
HIP 44089 |
10.68 |
| 2026-10-12 12:00 |
09:01:05.00 |
+25:30:15.0 |
HIP 44391 |
28.92 |
| 2026-10-13 00:00 |
09:02:49.78 |
+25:27:54.2 |
HIP 44391 |
23.73 |
| 2026-10-13 12:00 |
09:04:34.44 |
+25:25:30.5 |
HIP 44501 |
24.34 |
| 2026-10-14 00:00 |
09:06:18.95 |
+25:23:03.9 |
HIP 44806 |
25.75 |
| 2026-10-14 12:00 |
09:08:03.33 |
+25:20:34.4 |
HIP 44806 |
17.16 |
| 2026-10-15 00:00 |
09:09:47.56 |
+25:18:02.0 |
HIP 44995 |
3.34 |
| 2026-10-15 12:00 |
09:11:31.65 |
+25:15:26.9 |
HIP 45105 |
10.00 |
| 2026-10-16 00:00 |
09:13:15.58 |
+25:12:49.0 |
HIP 45278 |
6.45 |