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
$$
M_a = (20.000 + 3.080\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
20.000 |
| n |
3.080 |
| gf |
0.975 |
| gb |
-0.797 |
| k |
0.937 |
| δ90 |
3.293 |
| 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 |
01:43:14.35 |
+24:38:56.7 |
HIP 8005 |
18.76 |
| 2026-07-29 12:00 |
01:43:24.54 |
+24:41:56.0 |
HIP 8005 |
22.38 |
| 2026-07-30 00:00 |
01:43:34.40 |
+24:44:53.7 |
HIP 8005 |
25.99 |
| 2026-07-30 12:00 |
01:43:43.93 |
+24:47:49.8 |
HIP 8005 |
29.57 |
| 2026-07-31 00:00 |
01:43:53.12 |
+24:50:44.4 |
HIP 8215 |
28.72 |
| 2026-07-31 12:00 |
01:44:01.97 |
+24:53:37.4 |
HIP 8215 |
25.81 |
| 2026-08-01 00:00 |
01:44:10.49 |
+24:56:28.7 |
HIP 8215 |
23.15 |
| 2026-08-01 12:00 |
01:44:18.67 |
+24:59:18.4 |
HIP 8215 |
20.80 |
| 2026-08-02 00:00 |
01:44:26.50 |
+25:02:06.5 |
HIP 8215 |
18.84 |
| 2026-08-02 12:00 |
01:44:33.99 |
+25:04:53.0 |
HIP 8215 |
17.38 |
| 2026-08-03 00:00 |
01:44:41.14 |
+25:07:37.8 |
HIP 8215 |
16.51 |
| 2026-08-03 12:00 |
01:44:47.94 |
+25:10:20.9 |
HIP 8215 |
16.28 |
| 2026-08-04 00:00 |
01:44:54.40 |
+25:13:02.3 |
HIP 8215 |
16.69 |
| 2026-08-04 12:00 |
01:45:00.50 |
+25:15:42.0 |
HIP 8215 |
17.65 |
| 2026-08-05 00:00 |
01:45:06.25 |
+25:18:20.0 |
HIP 8215 |
19.06 |
| 2026-08-05 12:00 |
01:45:11.65 |
+25:20:56.2 |
HIP 8215 |
20.80 |
| 2026-08-06 00:00 |
01:45:16.69 |
+25:23:30.7 |
HIP 8215 |
22.77 |
| 2026-08-06 12:00 |
01:45:21.38 |
+25:26:03.4 |
HIP 8151 |
23.03 |
| 2026-08-07 00:00 |
01:45:25.71 |
+25:28:34.3 |
HIP 8151 |
21.05 |
| 2026-08-07 12:00 |
01:45:29.67 |
+25:31:03.5 |
HIP 8151 |
19.23 |
| 2026-08-08 00:00 |
01:45:33.28 |
+25:33:30.8 |
HIP 8151 |
17.60 |
| 2026-08-08 12:00 |
01:45:36.52 |
+25:35:56.2 |
HIP 8151 |
16.18 |
| 2026-08-09 00:00 |
01:45:39.40 |
+25:38:19.8 |
HIP 8151 |
15.01 |
| 2026-08-09 12:00 |
01:45:41.91 |
+25:40:41.5 |
HIP 8151 |
14.13 |
| 2026-08-10 00:00 |
01:45:44.05 |
+25:43:01.4 |
HIP 8151 |
13.56 |
| 2026-08-10 12:00 |
01:45:45.82 |
+25:45:19.3 |
HIP 8151 |
13.32 |
| 2026-08-11 00:00 |
01:45:47.22 |
+25:47:35.3 |
HIP 8151 |
13.40 |
| 2026-08-11 12:00 |
01:45:48.25 |
+25:49:49.3 |
HIP 8151 |
13.78 |
| 2026-08-12 00:00 |
01:45:48.91 |
+25:52:01.3 |
HIP 8285 |
12.98 |
| 2026-08-12 12:00 |
01:45:49.19 |
+25:54:11.4 |
HIP 8285 |
12.58 |
| 2026-08-13 00:00 |
01:45:49.10 |
+25:56:19.5 |
HIP 8285 |
12.62 |
| 2026-08-13 12:00 |
01:45:48.63 |
+25:58:25.5 |
HIP 8285 |
13.09 |
| 2026-08-14 00:00 |
01:45:47.79 |
+26:00:29.5 |
HIP 8285 |
13.93 |
| 2026-08-14 12:00 |
01:45:46.57 |
+26:02:31.5 |
HIP 8285 |
15.08 |
| 2026-08-15 00:00 |
01:45:44.97 |
+26:04:31.4 |
HIP 8285 |
16.44 |
| 2026-08-15 12:00 |
01:45:42.99 |
+26:06:29.1 |
HIP 8216 |
17.56 |
| 2026-08-16 00:00 |
01:45:40.64 |
+26:08:24.8 |
HIP 8216 |
15.70 |
| 2026-08-16 12:00 |
01:45:37.90 |
+26:10:18.4 |
HIP 8216 |
13.94 |
| 2026-08-17 00:00 |
01:45:34.79 |
+26:12:09.8 |
HIP 8216 |
12.29 |
| 2026-08-17 12:00 |
01:45:31.29 |
+26:13:59.0 |
HIP 8216 |
10.83 |
| 2026-08-18 00:00 |
01:45:27.42 |
+26:15:46.0 |
HIP 8216 |
9.63 |
| 2026-08-18 12:00 |
01:45:23.16 |
+26:17:30.9 |
HIP 8216 |
8.81 |
| 2026-08-19 00:00 |
01:45:18.53 |
+26:19:13.5 |
HIP 8216 |
8.48 |