メタデータ
| 項目 |
値 |
| Designation |
247P/LINEAR |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-01-04T03:56:54.191040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:04Z |
| Obs used |
1346 |
| 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) |
2011-09-09.0000000 |
| e |
0.62561919 |
| q (au) |
1.484389 |
| a (au) |
3.964918 |
| i (deg) |
13.682326 |
| Ω (om, deg) |
54.122500 |
| ω (w, deg) |
47.339311 |
| M (ma, deg) |
30.939706 |
等級
散乱 + 全体線形
$$
M_a = (17.699 + 3.514\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.699 |
| n |
3.514 |
| gf |
1.000 |
| gb |
-0.555 |
| 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 |
04:50:22.29 |
+21:06:31.3 |
HIP 22350 |
23.38 |
| 2026-07-29 12:00 |
04:51:47.11 |
+21:11:33.5 |
HIP 22827 |
41.73 |
| 2026-07-30 00:00 |
04:53:12.17 |
+21:16:34.1 |
HIP 22827 |
23.98 |
| 2026-07-30 12:00 |
04:54:37.47 |
+21:21:33.1 |
HIP 22827 |
15.65 |
| 2026-07-31 00:00 |
04:56:03.03 |
+21:26:30.4 |
HIP 22947 |
8.26 |
| 2026-07-31 12:00 |
04:57:28.84 |
+21:31:26.0 |
HIP 22970 |
13.04 |
| 2026-08-01 00:00 |
04:58:54.90 |
+21:36:19.9 |
HIP 23167 |
8.07 |
| 2026-08-01 12:00 |
05:00:21.21 |
+21:41:12.1 |
HIP 23167 |
18.48 |
| 2026-08-02 00:00 |
05:01:47.77 |
+21:46:02.6 |
HIP 23497 |
21.00 |
| 2026-08-02 12:00 |
05:03:14.58 |
+21:50:51.3 |
HIP 23497 |
15.59 |
| 2026-08-03 00:00 |
05:04:41.64 |
+21:55:38.2 |
HIP 23592 |
17.62 |
| 2026-08-03 12:00 |
05:06:08.95 |
+22:00:23.3 |
HIP 23656 |
22.28 |
| 2026-08-04 00:00 |
05:07:36.52 |
+22:05:06.5 |
HIP 23909 |
18.47 |
| 2026-08-04 12:00 |
05:09:04.33 |
+22:09:48.0 |
HIP 24063 |
15.97 |
| 2026-08-05 00:00 |
05:10:32.40 |
+22:14:27.5 |
HIP 24063 |
7.71 |
| 2026-08-05 12:00 |
05:12:00.72 |
+22:19:05.1 |
HIP 24163 |
9.77 |
| 2026-08-06 00:00 |
05:13:29.30 |
+22:23:40.8 |
HIP 24415 |
19.62 |
| 2026-08-06 12:00 |
05:14:58.12 |
+22:28:14.6 |
HIP 24512 |
13.08 |
| 2026-08-07 00:00 |
05:16:27.19 |
+22:32:46.4 |
HIP 24512 |
20.86 |
| 2026-08-07 12:00 |
05:17:56.52 |
+22:37:16.2 |
HIP 24668 |
13.66 |
| 2026-08-08 00:00 |
05:19:26.09 |
+22:41:44.0 |
HIP 24668 |
27.40 |
| 2026-08-08 12:00 |
05:20:55.91 |
+22:46:09.8 |
HIP 25068 |
18.19 |
| 2026-08-09 00:00 |
05:22:25.99 |
+22:50:33.4 |
HIP 25068 |
9.18 |
| 2026-08-09 12:00 |
05:23:56.31 |
+22:54:55.1 |
HIP 25312 |
12.97 |
| 2026-08-10 00:00 |
05:25:26.88 |
+22:59:14.5 |
HIP 25312 |
8.39 |
| 2026-08-10 12:00 |
05:26:57.70 |
+23:03:31.9 |
HIP 25586 |
17.51 |
| 2026-08-11 00:00 |
05:28:28.76 |
+23:07:47.1 |
HIP 25572 |
12.44 |
| 2026-08-11 12:00 |
05:30:00.07 |
+23:12:00.2 |
HIP 25848 |
14.79 |
| 2026-08-12 00:00 |
05:31:31.63 |
+23:16:11.0 |
HIP 25851 |
6.75 |
| 2026-08-12 12:00 |
05:33:03.42 |
+23:20:19.6 |
HIP 26015 |
11.79 |
| 2026-08-13 00:00 |
05:34:35.47 |
+23:24:26.0 |
HIP 26015 |
26.09 |
| 2026-08-13 12:00 |
05:36:07.75 |
+23:28:30.1 |
HIP 26365 |
21.01 |
| 2026-08-14 00:00 |
05:37:40.28 |
+23:32:31.9 |
HIP 26449 |
23.69 |
| 2026-08-14 12:00 |
05:39:13.05 |
+23:36:31.4 |
HIP 26599 |
17.13 |
| 2026-08-15 00:00 |
05:40:46.07 |
+23:40:28.5 |
HIP 26836 |
26.17 |
| 2026-08-15 12:00 |
05:42:19.32 |
+23:44:23.3 |
HIP 26836 |
25.44 |
| 2026-08-16 00:00 |
05:43:52.81 |
+23:48:15.8 |
HIP 27159 |
26.91 |
| 2026-08-16 12:00 |
05:45:26.54 |
+23:52:05.8 |
HIP 27203 |
10.32 |
| 2026-08-17 00:00 |
05:47:00.51 |
+23:55:53.4 |
HIP 27203 |
17.95 |
| 2026-08-17 12:00 |
05:48:34.71 |
+23:59:38.5 |
HIP 27442 |
12.54 |
| 2026-08-18 00:00 |
05:50:09.16 |
+24:03:21.2 |
HIP 27652 |
17.35 |
| 2026-08-18 12:00 |
05:51:43.84 |
+24:07:01.4 |
HIP 27652 |
12.97 |
| 2026-08-19 00:00 |
05:53:18.75 |
+24:10:39.0 |
HIP 27851 |
7.40 |