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) |
| 2026-06-01 00:00 |
02:31:03.12 |
+09:32:29.3 |
HIP 11603 |
21.69 |
| 2026-06-01 12:00 |
02:32:04.60 |
+09:38:56.3 |
HIP 11864 |
32.86 |
| 2026-06-02 00:00 |
02:33:06.23 |
+09:45:23.2 |
HIP 11864 |
22.84 |
| 2026-06-02 12:00 |
02:34:08.01 |
+09:51:50.0 |
HIP 11864 |
22.56 |
| 2026-06-03 00:00 |
02:35:09.94 |
+09:58:16.6 |
HIP 12076 |
12.06 |
| 2026-06-03 12:00 |
02:36:12.02 |
+10:04:43.1 |
HIP 12076 |
7.80 |
| 2026-06-04 00:00 |
02:37:14.26 |
+10:11:09.4 |
HIP 12076 |
22.97 |
| 2026-06-04 12:00 |
02:38:16.65 |
+10:17:35.5 |
HIP 12354 |
23.63 |
| 2026-06-05 00:00 |
02:39:19.20 |
+10:24:01.5 |
HIP 12354 |
14.73 |
| 2026-06-05 12:00 |
02:40:21.91 |
+10:30:27.3 |
HIP 12497 |
11.30 |
| 2026-06-06 00:00 |
02:41:24.78 |
+10:36:52.9 |
HIP 12599 |
9.64 |
| 2026-06-06 12:00 |
02:42:27.80 |
+10:43:18.3 |
HIP 12647 |
1.23 |
| 2026-06-07 00:00 |
02:43:30.98 |
+10:49:43.5 |
HIP 12787 |
14.70 |
| 2026-06-07 12:00 |
02:44:34.33 |
+10:56:08.5 |
HIP 12787 |
3.55 |
| 2026-06-08 00:00 |
02:45:37.84 |
+11:02:33.3 |
HIP 12877 |
14.08 |
| 2026-06-08 12:00 |
02:46:41.50 |
+11:08:57.8 |
HIP 12877 |
26.52 |
| 2026-06-09 00:00 |
02:47:45.34 |
+11:15:22.1 |
HIP 12929 |
37.93 |
| 2026-06-09 12:00 |
02:48:49.33 |
+11:21:46.2 |
HIP 13228 |
26.52 |
| 2026-06-10 00:00 |
02:49:53.49 |
+11:28:10.0 |
HIP 13228 |
10.62 |
| 2026-06-10 12:00 |
02:50:57.82 |
+11:34:33.6 |
HIP 13228 |
9.96 |
| 2026-06-11 00:00 |
02:52:02.31 |
+11:40:56.9 |
HIP 13366 |
18.71 |
| 2026-06-11 12:00 |
02:53:06.97 |
+11:47:19.9 |
HIP 13461 |
13.27 |
| 2026-06-12 00:00 |
02:54:11.80 |
+11:53:42.6 |
HIP 13461 |
14.50 |
| 2026-06-12 12:00 |
02:55:16.79 |
+12:00:05.0 |
HIP 13669 |
25.66 |
| 2026-06-13 00:00 |
02:56:21.96 |
+12:06:27.2 |
HIP 13669 |
17.45 |
| 2026-06-13 12:00 |
02:57:27.29 |
+12:12:49.0 |
HIP 13669 |
23.24 |
| 2026-06-14 00:00 |
02:58:32.80 |
+12:19:10.4 |
HIP 13921 |
22.28 |
| 2026-06-14 12:00 |
02:59:38.47 |
+12:25:31.6 |
HIP 13921 |
25.74 |
| 2026-06-15 00:00 |
03:00:44.32 |
+12:31:52.3 |
HIP 14037 |
27.22 |
| 2026-06-15 12:00 |
03:01:50.34 |
+12:38:12.8 |
HIP 14175 |
21.81 |
| 2026-06-16 00:00 |
03:02:56.53 |
+12:44:32.9 |
HIP 14175 |
23.44 |
| 2026-06-16 12:00 |
03:04:02.90 |
+12:50:52.6 |
HIP 14343 |
17.51 |
| 2026-06-17 00:00 |
03:05:09.44 |
+12:57:11.9 |
HIP 14343 |
17.82 |
| 2026-06-17 12:00 |
03:06:16.16 |
+13:03:30.8 |
HIP 14439 |
7.95 |
| 2026-06-18 00:00 |
03:07:23.05 |
+13:09:49.3 |
HIP 14579 |
12.11 |
| 2026-06-18 12:00 |
03:08:30.12 |
+13:16:07.4 |
HIP 14579 |
7.27 |
| 2026-06-19 00:00 |
03:09:37.37 |
+13:22:25.1 |
HIP 14711 |
23.51 |
| 2026-06-19 12:00 |
03:10:44.79 |
+13:28:42.4 |
HIP 14694 |
21.77 |
| 2026-06-20 00:00 |
03:11:52.40 |
+13:34:59.2 |
HIP 14897 |
27.94 |
| 2026-06-20 12:00 |
03:13:00.19 |
+13:41:15.6 |
HIP 14897 |
23.77 |
| 2026-06-21 00:00 |
03:14:08.15 |
+13:47:31.6 |
HIP 14897 |
31.17 |
| 2026-06-21 12:00 |
03:15:16.31 |
+13:53:47.0 |
HIP 15233 |
17.00 |
| 2026-06-22 00:00 |
03:16:24.64 |
+14:00:02.0 |
HIP 15233 |
8.95 |