メタデータ
| 項目 |
値 |
| Designation |
317P/WISE |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-08-08T11:39:00.054720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:23Z |
| Obs used |
93 |
| NEO |
Yes |
| M1 |
19.500 |
| K1 |
4.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-05-21.0000000 |
| e |
0.58023673 |
| q (au) |
1.241121 |
| a (au) |
2.956716 |
| i (deg) |
11.962566 |
| Ω (om, deg) |
275.692894 |
| ω (w, deg) |
334.741411 |
| M (ma, deg) |
203.072609 |
等級
散乱 + 全体線形
$$
M_a = (20.000 + 3.235\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
3.235 |
| gf |
0.999 |
| gb |
-0.794 |
| k |
0.923 |
| δ90 |
3.149 |
| 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) |
| 2026-05-12 00:00 |
00:25:49.02 |
+12:42:08.2 |
HIP 1922 |
23.09 |
| 2026-05-12 12:00 |
00:26:33.27 |
+12:48:06.5 |
HIP 2245 |
31.75 |
| 2026-05-13 00:00 |
00:27:17.37 |
+12:54:03.8 |
HIP 2245 |
26.21 |
| 2026-05-13 12:00 |
00:28:01.32 |
+13:00:00.2 |
HIP 2245 |
25.86 |
| 2026-05-14 00:00 |
00:28:45.13 |
+13:05:55.5 |
HIP 2313 |
25.48 |
| 2026-05-14 12:00 |
00:29:28.78 |
+13:11:49.9 |
HIP 2313 |
17.01 |
| 2026-05-15 00:00 |
00:30:12.29 |
+13:17:43.2 |
HIP 2313 |
14.99 |
| 2026-05-15 12:00 |
00:30:55.65 |
+13:23:35.6 |
HIP 2411 |
15.90 |
| 2026-05-16 00:00 |
00:31:38.85 |
+13:29:27.0 |
HIP 2547 |
11.23 |
| 2026-05-16 12:00 |
00:32:21.91 |
+13:35:17.4 |
HIP 2547 |
3.10 |
| 2026-05-17 00:00 |
00:33:04.81 |
+13:41:06.8 |
HIP 2626 |
9.89 |
| 2026-05-17 12:00 |
00:33:47.57 |
+13:46:55.1 |
HIP 2626 |
7.91 |
| 2026-05-18 00:00 |
00:34:30.17 |
+13:52:42.5 |
HIP 2626 |
17.57 |
| 2026-05-18 12:00 |
00:35:12.61 |
+13:58:28.9 |
HIP 2822 |
9.69 |
| 2026-05-19 00:00 |
00:35:54.91 |
+14:04:14.2 |
HIP 2822 |
4.43 |
| 2026-05-19 12:00 |
00:36:37.04 |
+14:09:58.6 |
HIP 2822 |
14.86 |
| 2026-05-20 00:00 |
00:37:19.03 |
+14:15:41.9 |
HIP 2822 |
26.35 |
| 2026-05-20 12:00 |
00:38:00.85 |
+14:21:24.2 |
HIP 3129 |
27.15 |
| 2026-05-21 00:00 |
00:38:42.53 |
+14:27:05.5 |
HIP 3129 |
21.53 |
| 2026-05-21 12:00 |
00:39:24.04 |
+14:32:45.8 |
HIP 3129 |
21.41 |
| 2026-05-22 00:00 |
00:40:05.40 |
+14:38:25.0 |
HIP 3242 |
25.17 |
| 2026-05-22 12:00 |
00:40:46.61 |
+14:44:03.3 |
HIP 3242 |
14.76 |
| 2026-05-23 00:00 |
00:41:27.65 |
+14:49:40.5 |
HIP 3242 |
8.02 |
| 2026-05-23 12:00 |
00:42:08.54 |
+14:55:16.7 |
HIP 3242 |
13.02 |
| 2026-05-24 00:00 |
00:42:49.27 |
+15:00:51.9 |
HIP 3409 |
9.77 |
| 2026-05-24 12:00 |
00:43:29.84 |
+15:06:26.0 |
HIP 3409 |
1.50 |
| 2026-05-25 00:00 |
00:44:10.25 |
+15:11:59.2 |
HIP 3409 |
12.72 |
| 2026-05-25 12:00 |
00:44:50.50 |
+15:17:31.3 |
HIP 3545 |
10.10 |
| 2026-05-26 00:00 |
00:45:30.60 |
+15:23:02.4 |
HIP 3545 |
13.43 |
| 2026-05-26 12:00 |
00:46:10.53 |
+15:28:32.5 |
HIP 3632 |
5.41 |
| 2026-05-27 00:00 |
00:46:50.30 |
+15:34:01.5 |
HIP 3632 |
6.90 |
| 2026-05-27 12:00 |
00:47:29.91 |
+15:39:29.6 |
HIP 3632 |
17.55 |
| 2026-05-28 00:00 |
00:48:09.36 |
+15:44:56.6 |
HIP 3871 |
26.01 |
| 2026-05-28 12:00 |
00:48:48.65 |
+15:50:22.6 |
HIP 3871 |
15.12 |
| 2026-05-29 00:00 |
00:49:27.78 |
+15:55:47.6 |
HIP 3871 |
4.29 |
| 2026-05-29 12:00 |
00:50:06.74 |
+16:01:11.6 |
HIP 3871 |
6.58 |
| 2026-05-30 00:00 |
00:50:45.54 |
+16:06:34.5 |
HIP 3871 |
17.33 |
| 2026-05-30 12:00 |
00:51:24.17 |
+16:11:56.5 |
HIP 3871 |
28.04 |
| 2026-05-31 00:00 |
00:52:02.64 |
+16:17:17.4 |
HIP 4048 |
25.86 |
| 2026-05-31 12:00 |
00:52:40.94 |
+16:22:37.3 |
HIP 4048 |
23.62 |
| 2026-06-01 00:00 |
00:53:19.08 |
+16:27:56.1 |
HIP 4048 |
25.90 |
| 2026-06-01 12:00 |
00:53:57.05 |
+16:33:14.0 |
HIP 4303 |
27.31 |
| 2026-06-02 00:00 |
00:54:34.86 |
+16:38:30.8 |
HIP 4303 |
17.95 |