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 |
9.997 |
| 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) |
| 2026-09-25 00:00 |
03:11:25.25 |
+10:12:39.2 |
HIP 14792 |
14.55 |
| 2026-09-25 12:00 |
03:11:31.86 |
+10:11:27.8 |
HIP 14792 |
14.27 |
| 2026-09-26 00:00 |
03:11:38.06 |
+10:10:14.5 |
HIP 14792 |
14.18 |
| 2026-09-26 12:00 |
03:11:43.86 |
+10:08:59.5 |
HIP 14906 |
14.27 |
| 2026-09-27 00:00 |
03:11:49.25 |
+10:07:42.7 |
HIP 14906 |
14.45 |
| 2026-09-27 12:00 |
03:11:54.24 |
+10:06:24.1 |
HIP 14792 |
14.87 |
| 2026-09-28 00:00 |
03:11:58.81 |
+10:05:03.7 |
HIP 14792 |
15.32 |
| 2026-09-28 12:00 |
03:12:02.97 |
+10:03:41.5 |
HIP 14792 |
15.85 |
| 2026-09-29 00:00 |
03:12:06.70 |
+10:02:17.5 |
HIP 14792 |
16.44 |
| 2026-09-29 12:00 |
03:12:10.02 |
+10:00:51.8 |
HIP 14792 |
17.06 |
| 2026-09-30 00:00 |
03:12:12.91 |
+09:59:24.3 |
HIP 14792 |
17.70 |
| 2026-09-30 12:00 |
03:12:15.37 |
+09:57:55.0 |
HIP 14792 |
18.37 |
| 2026-10-01 00:00 |
03:12:17.40 |
+09:56:23.9 |
HIP 14792 |
19.05 |
| 2026-10-01 12:00 |
03:12:18.99 |
+09:54:51.0 |
HIP 14792 |
19.73 |
| 2026-10-02 00:00 |
03:12:20.15 |
+09:53:16.4 |
HIP 14792 |
20.42 |
| 2026-10-02 12:00 |
03:12:20.86 |
+09:51:40.1 |
HIP 14792 |
21.13 |
| 2026-10-03 00:00 |
03:12:21.13 |
+09:50:02.0 |
HIP 14792 |
21.84 |
| 2026-10-03 12:00 |
03:12:20.95 |
+09:48:22.1 |
HIP 14792 |
22.56 |
| 2026-10-04 00:00 |
03:12:20.33 |
+09:46:40.6 |
HIP 14792 |
23.31 |
| 2026-10-04 12:00 |
03:12:19.25 |
+09:44:57.3 |
HIP 14792 |
24.07 |
| 2026-10-05 00:00 |
03:12:17.72 |
+09:43:12.3 |
HIP 14792 |
24.88 |
| 2026-10-05 12:00 |
03:12:15.73 |
+09:41:25.6 |
HIP 14792 |
25.71 |
| 2026-10-06 00:00 |
03:12:13.28 |
+09:39:37.2 |
HIP 14792 |
26.60 |
| 2026-10-06 12:00 |
03:12:10.37 |
+09:37:47.2 |
HIP 14792 |
27.54 |
| 2026-10-07 00:00 |
03:12:07.00 |
+09:35:55.5 |
HIP 14803 |
27.91 |
| 2026-10-07 12:00 |
03:12:03.16 |
+09:34:02.2 |
HIP 14803 |
25.80 |
| 2026-10-08 00:00 |
03:11:58.86 |
+09:32:07.2 |
HIP 14803 |
23.61 |
| 2026-10-08 12:00 |
03:11:54.09 |
+09:30:10.7 |
HIP 14803 |
21.34 |
| 2026-10-09 00:00 |
03:11:48.85 |
+09:28:12.6 |
HIP 14803 |
18.99 |
| 2026-10-09 12:00 |
03:11:43.15 |
+09:26:12.9 |
HIP 14803 |
16.56 |
| 2026-10-10 00:00 |
03:11:36.97 |
+09:24:11.7 |
HIP 14803 |
14.05 |
| 2026-10-10 12:00 |
03:11:30.32 |
+09:22:09.0 |
HIP 14803 |
11.49 |
| 2026-10-11 00:00 |
03:11:23.21 |
+09:20:04.7 |
HIP 14803 |
8.89 |
| 2026-10-11 12:00 |
03:11:15.62 |
+09:17:59.0 |
HIP 14803 |
6.34 |
| 2026-10-12 00:00 |
03:11:07.56 |
+09:15:51.9 |
HIP 14803 |
4.12 |
| 2026-10-12 12:00 |
03:10:59.03 |
+09:13:43.3 |
HIP 14803 |
3.36 |
| 2026-10-13 00:00 |
03:10:50.03 |
+09:11:33.4 |
HIP 14803 |
4.98 |
| 2026-10-13 12:00 |
03:10:40.56 |
+09:09:22.1 |
HIP 14803 |
7.70 |
| 2026-10-14 00:00 |
03:10:30.62 |
+09:07:09.4 |
HIP 14803 |
10.81 |
| 2026-10-14 12:00 |
03:10:20.21 |
+09:04:55.4 |
HIP 14803 |
14.12 |
| 2026-10-15 00:00 |
03:10:09.34 |
+09:02:40.2 |
HIP 14803 |
17.57 |
| 2026-10-15 12:00 |
03:09:57.99 |
+09:00:23.7 |
HIP 14803 |
21.15 |
| 2026-10-16 00:00 |
03:09:46.18 |
+08:58:05.9 |
HIP 14603 |
19.04 |