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) |
| 2026-03-26 00:00 |
00:31:50.23 |
-04:40:10.9 |
HIP 2482 |
23.72 |
| 2026-03-26 12:00 |
00:32:37.04 |
-04:34:05.4 |
HIP 2482 |
23.68 |
| 2026-03-27 00:00 |
00:33:23.92 |
-04:27:59.5 |
HIP 2713 |
17.09 |
| 2026-03-27 12:00 |
00:34:10.90 |
-04:21:53.2 |
HIP 2715 |
11.75 |
| 2026-03-28 00:00 |
00:34:57.95 |
-04:15:46.6 |
HIP 2715 |
18.11 |
| 2026-03-28 12:00 |
00:35:45.10 |
-04:09:39.7 |
HIP 2715 |
29.47 |
| 2026-03-29 00:00 |
00:36:32.33 |
-04:03:32.4 |
HIP 2762 |
34.03 |
| 2026-03-29 12:00 |
00:37:19.64 |
-03:57:24.7 |
HIP 3082 |
27.50 |
| 2026-03-30 00:00 |
00:38:07.04 |
-03:51:16.6 |
HIP 3082 |
17.65 |
| 2026-03-30 12:00 |
00:38:54.53 |
-03:45:08.3 |
HIP 3082 |
14.90 |
| 2026-03-31 00:00 |
00:39:42.10 |
-03:38:59.5 |
HIP 3082 |
22.11 |
| 2026-03-31 12:00 |
00:40:29.76 |
-03:32:50.4 |
HIP 3115 |
30.68 |
| 2026-04-01 00:00 |
00:41:17.50 |
-03:26:41.0 |
HIP 3311 |
26.71 |
| 2026-04-01 12:00 |
00:42:05.33 |
-03:20:31.2 |
HIP 3311 |
17.19 |
| 2026-04-02 00:00 |
00:42:53.25 |
-03:14:21.0 |
HIP 3311 |
15.46 |
| 2026-04-02 12:00 |
00:43:41.26 |
-03:08:10.5 |
HIP 3435 |
4.06 |
| 2026-04-03 00:00 |
00:44:29.36 |
-03:01:59.7 |
HIP 3435 |
10.20 |
| 2026-04-03 12:00 |
00:45:17.54 |
-02:55:48.5 |
HIP 3435 |
23.61 |
| 2026-04-04 00:00 |
00:46:05.81 |
-02:49:37.0 |
HIP 3435 |
37.13 |
| 2026-04-04 12:00 |
00:46:54.18 |
-02:43:25.1 |
HIP 3708 |
26.36 |
| 2026-04-05 00:00 |
00:47:42.63 |
-02:37:12.9 |
HIP 3708 |
17.96 |
| 2026-04-05 12:00 |
00:48:31.17 |
-02:31:00.4 |
HIP 3708 |
17.90 |
| 2026-04-06 00:00 |
00:49:19.80 |
-02:24:47.5 |
HIP 3708 |
26.28 |
| 2026-04-06 12:00 |
00:50:08.52 |
-02:18:34.3 |
HIP 3957 |
25.22 |
| 2026-04-07 00:00 |
00:50:57.34 |
-02:12:20.8 |
HIP 3957 |
17.21 |
| 2026-04-07 12:00 |
00:51:46.24 |
-02:06:07.0 |
HIP 3957 |
18.22 |
| 2026-04-08 00:00 |
00:52:35.23 |
-01:59:52.8 |
HIP 4125 |
7.04 |
| 2026-04-08 12:00 |
00:53:24.32 |
-01:53:38.3 |
HIP 4125 |
8.33 |
| 2026-04-09 00:00 |
00:54:13.50 |
-01:47:23.5 |
HIP 4125 |
21.66 |
| 2026-04-09 12:00 |
00:55:02.77 |
-01:41:08.4 |
HIP 4314 |
11.27 |
| 2026-04-10 00:00 |
00:55:52.13 |
-01:34:52.9 |
HIP 4314 |
10.70 |
| 2026-04-10 12:00 |
00:56:41.59 |
-01:28:37.2 |
HIP 4314 |
22.03 |
| 2026-04-11 00:00 |
00:57:31.14 |
-01:22:21.1 |
HIP 4511 |
24.08 |
| 2026-04-11 12:00 |
00:58:20.78 |
-01:16:04.8 |
HIP 4641 |
19.12 |
| 2026-04-12 00:00 |
00:59:10.52 |
-01:09:48.1 |
HIP 4641 |
6.37 |
| 2026-04-12 12:00 |
01:00:00.35 |
-01:03:31.2 |
HIP 4641 |
10.18 |
| 2026-04-13 00:00 |
01:00:50.27 |
-00:57:14.0 |
HIP 4735 |
4.08 |
| 2026-04-13 12:00 |
01:01:40.29 |
-00:50:56.4 |
HIP 4735 |
16.37 |
| 2026-04-14 00:00 |
01:02:30.40 |
-00:44:38.6 |
HIP 4984 |
27.70 |
| 2026-04-14 12:00 |
01:03:20.61 |
-00:38:20.6 |
HIP 4984 |
25.99 |
| 2026-04-15 00:00 |
01:04:10.91 |
-00:32:02.2 |
HIP 4984 |
31.28 |
| 2026-04-15 12:00 |
01:05:01.31 |
-00:25:43.6 |
HIP 5181 |
20.96 |
| 2026-04-16 00:00 |
01:05:51.80 |
-00:19:24.7 |
HIP 5181 |
6.86 |