メタデータ
| 項目 |
値 |
| Designation |
P/2013 W1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-03-08T04:13:11.366400Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:42Z |
| Obs used |
105 |
| NEO |
- |
| M1 |
18.800 |
| K1 |
5.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-12-22.0000000 |
| e |
0.59388126 |
| q (au) |
1.415613 |
| a (au) |
3.485712 |
| i (deg) |
4.699497 |
| Ω (om, deg) |
117.856010 |
| ω (w, deg) |
1.327118 |
| M (ma, deg) |
348.463235 |
等級
散乱 + 全体線形
$$
M_a = (17.227 + 3.690\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.227 |
| n |
3.690 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-05-12 00:00 |
00:51:08.42 |
+01:47:16.7 |
HIP 4203 |
38.27 |
| 2026-05-12 12:00 |
00:51:46.31 |
+01:50:54.7 |
HIP 4203 |
28.33 |
| 2026-05-13 00:00 |
00:52:24.20 |
+01:54:32.5 |
HIP 4203 |
18.63 |
| 2026-05-13 12:00 |
00:53:02.10 |
+01:58:09.9 |
HIP 4203 |
9.83 |
| 2026-05-14 00:00 |
00:53:40.01 |
+02:01:47.1 |
HIP 4203 |
7.21 |
| 2026-05-14 12:00 |
00:54:17.93 |
+02:05:23.9 |
HIP 4203 |
14.59 |
| 2026-05-15 00:00 |
00:54:55.85 |
+02:09:00.4 |
HIP 4203 |
24.07 |
| 2026-05-15 12:00 |
00:55:33.78 |
+02:12:36.6 |
HIP 4286 |
24.99 |
| 2026-05-16 00:00 |
00:56:11.71 |
+02:16:12.5 |
HIP 4504 |
24.95 |
| 2026-05-16 12:00 |
00:56:49.65 |
+02:19:48.0 |
HIP 4504 |
19.32 |
| 2026-05-17 00:00 |
00:57:27.59 |
+02:23:23.2 |
HIP 4529 |
9.77 |
| 2026-05-17 12:00 |
00:58:05.54 |
+02:26:58.1 |
HIP 4529 |
2.74 |
| 2026-05-18 00:00 |
00:58:43.49 |
+02:30:32.6 |
HIP 4564 |
7.35 |
| 2026-05-18 12:00 |
00:59:21.44 |
+02:34:06.8 |
HIP 4677 |
11.70 |
| 2026-05-19 00:00 |
00:59:59.39 |
+02:37:40.6 |
HIP 4677 |
1.59 |
| 2026-05-19 12:00 |
01:00:37.35 |
+02:41:14.0 |
HIP 4738 |
7.05 |
| 2026-05-20 00:00 |
01:01:15.31 |
+02:44:47.0 |
HIP 4738 |
11.50 |
| 2026-05-20 12:00 |
01:01:53.27 |
+02:48:19.7 |
HIP 4825 |
16.85 |
| 2026-05-21 00:00 |
01:02:31.23 |
+02:51:52.0 |
HIP 4825 |
21.79 |
| 2026-05-21 12:00 |
01:03:09.19 |
+02:55:23.9 |
HIP 4945 |
20.37 |
| 2026-05-22 00:00 |
01:03:47.15 |
+02:58:55.5 |
HIP 4945 |
17.24 |
| 2026-05-22 12:00 |
01:04:25.12 |
+03:02:26.6 |
HIP 4945 |
19.60 |
| 2026-05-23 00:00 |
01:05:03.08 |
+03:05:57.4 |
HIP 5166 |
18.86 |
| 2026-05-23 12:00 |
01:05:41.04 |
+03:09:27.7 |
HIP 5166 |
9.35 |
| 2026-05-24 00:00 |
01:06:19.01 |
+03:12:57.7 |
HIP 5166 |
4.83 |
| 2026-05-24 12:00 |
01:06:56.97 |
+03:16:27.2 |
HIP 5166 |
12.78 |
| 2026-05-25 00:00 |
01:07:34.93 |
+03:19:56.3 |
HIP 5166 |
22.52 |
| 2026-05-25 12:00 |
01:08:12.89 |
+03:23:25.0 |
HIP 5230 |
32.19 |
| 2026-05-26 00:00 |
01:08:50.85 |
+03:26:53.3 |
HIP 5230 |
36.62 |
| 2026-05-26 12:00 |
01:09:28.81 |
+03:30:21.2 |
HIP 5572 |
30.69 |
| 2026-05-27 00:00 |
01:10:06.77 |
+03:33:48.6 |
HIP 5572 |
23.10 |
| 2026-05-27 12:00 |
01:10:44.73 |
+03:37:15.6 |
HIP 5572 |
18.14 |
| 2026-05-28 00:00 |
01:11:22.68 |
+03:40:42.2 |
HIP 5572 |
18.10 |
| 2026-05-28 12:00 |
01:12:00.64 |
+03:44:08.4 |
HIP 5572 |
22.99 |
| 2026-05-29 00:00 |
01:12:38.59 |
+03:47:34.1 |
HIP 5572 |
30.54 |
| 2026-05-29 12:00 |
01:13:16.53 |
+03:50:59.3 |
HIP 5821 |
21.47 |
| 2026-05-30 00:00 |
01:13:54.48 |
+03:54:24.1 |
HIP 5821 |
13.71 |
| 2026-05-30 12:00 |
01:14:32.42 |
+03:57:48.5 |
HIP 5848 |
7.98 |
| 2026-05-31 00:00 |
01:15:10.36 |
+04:01:12.3 |
HIP 5848 |
7.20 |
| 2026-05-31 12:00 |
01:15:48.30 |
+04:04:35.8 |
HIP 5848 |
15.55 |
| 2026-06-01 00:00 |
01:16:26.23 |
+04:07:58.7 |
HIP 6018 |
20.57 |
| 2026-06-01 12:00 |
01:17:04.16 |
+04:11:21.2 |
HIP 6018 |
12.81 |
| 2026-06-02 00:00 |
01:17:42.09 |
+04:14:43.2 |
HIP 6018 |
10.34 |