メタデータ
| 項目 |
値 |
| Designation |
C/2014 W11 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-06-17T08:54:15.324480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:04Z |
| Obs used |
1038 |
| NEO |
- |
| M1 |
10.300 |
| K1 |
6.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-06-01.0000000 |
| e |
0.65023088 |
| q (au) |
3.426807 |
| a (au) |
9.797339 |
| i (deg) |
12.706625 |
| Ω (om, deg) |
295.942382 |
| ω (w, deg) |
225.644803 |
| M (ma, deg) |
359.473841 |
等級
散乱 + 全体線形
$$
M_a = (7.093 + 3.562\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.093 |
| n |
3.562 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2014-10-22 |
2015-06-12 |
+82.2821 |
-44.843 |
| 2015-06-27 |
2017-05-27 |
+12.3719 |
-7.898 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
21:49:29.38 |
-01:58:18.6 |
HIP 107878 |
33.58 |
| 2026-03-26 12:00 |
21:49:36.04 |
-01:57:23.3 |
HIP 107878 |
32.61 |
| 2026-03-27 00:00 |
21:49:42.67 |
-01:56:28.0 |
HIP 107878 |
31.73 |
| 2026-03-27 12:00 |
21:49:49.25 |
-01:55:32.7 |
HIP 107878 |
30.95 |
| 2026-03-28 00:00 |
21:49:55.80 |
-01:54:37.5 |
HIP 107878 |
30.28 |
| 2026-03-28 12:00 |
21:50:02.31 |
-01:53:42.3 |
HIP 107878 |
29.71 |
| 2026-03-29 00:00 |
21:50:08.78 |
-01:52:47.2 |
HIP 107878 |
29.26 |
| 2026-03-29 12:00 |
21:50:15.21 |
-01:51:52.1 |
HIP 107878 |
28.93 |
| 2026-03-30 00:00 |
21:50:21.60 |
-01:50:57.1 |
HIP 107878 |
28.72 |
| 2026-03-30 12:00 |
21:50:27.96 |
-01:50:02.1 |
HIP 107878 |
28.63 |
| 2026-03-31 00:00 |
21:50:34.27 |
-01:49:07.2 |
HIP 107878 |
28.66 |
| 2026-03-31 12:00 |
21:50:40.54 |
-01:48:12.3 |
HIP 107878 |
28.81 |
| 2026-04-01 00:00 |
21:50:46.78 |
-01:47:17.5 |
HIP 107878 |
29.07 |
| 2026-04-01 12:00 |
21:50:52.97 |
-01:46:22.7 |
HIP 107878 |
29.45 |
| 2026-04-02 00:00 |
21:50:59.12 |
-01:45:28.0 |
HIP 107878 |
29.93 |
| 2026-04-02 12:00 |
21:51:05.23 |
-01:44:33.4 |
HIP 107878 |
30.50 |
| 2026-04-03 00:00 |
21:51:11.30 |
-01:43:38.8 |
HIP 107939 |
29.71 |
| 2026-04-03 12:00 |
21:51:17.33 |
-01:42:44.3 |
HIP 107939 |
28.24 |
| 2026-04-04 00:00 |
21:51:23.31 |
-01:41:49.9 |
HIP 107939 |
26.81 |
| 2026-04-04 12:00 |
21:51:29.25 |
-01:40:55.6 |
HIP 107939 |
25.42 |
| 2026-04-05 00:00 |
21:51:35.15 |
-01:40:01.3 |
HIP 107939 |
24.08 |
| 2026-04-05 12:00 |
21:51:41.01 |
-01:39:07.1 |
HIP 107939 |
22.80 |
| 2026-04-06 00:00 |
21:51:46.82 |
-01:38:13.0 |
HIP 107939 |
21.59 |
| 2026-04-06 12:00 |
21:51:52.59 |
-01:37:19.0 |
HIP 107939 |
20.44 |
| 2026-04-07 00:00 |
21:51:58.31 |
-01:36:25.1 |
HIP 107939 |
19.38 |
| 2026-04-07 12:00 |
21:52:03.99 |
-01:35:31.3 |
HIP 107939 |
18.42 |
| 2026-04-08 00:00 |
21:52:09.63 |
-01:34:37.5 |
HIP 107939 |
17.57 |
| 2026-04-08 12:00 |
21:52:15.22 |
-01:33:43.9 |
HIP 107939 |
16.84 |
| 2026-04-09 00:00 |
21:52:20.76 |
-01:32:50.4 |
HIP 107939 |
16.24 |
| 2026-04-09 12:00 |
21:52:26.26 |
-01:31:56.9 |
HIP 107939 |
15.79 |
| 2026-04-10 00:00 |
21:52:31.71 |
-01:31:03.6 |
HIP 107939 |
15.50 |
| 2026-04-10 12:00 |
21:52:37.12 |
-01:30:10.4 |
HIP 107939 |
15.38 |
| 2026-04-11 00:00 |
21:52:42.48 |
-01:29:17.3 |
HIP 107939 |
15.41 |
| 2026-04-11 12:00 |
21:52:47.79 |
-01:28:24.3 |
HIP 107939 |
15.61 |
| 2026-04-12 00:00 |
21:52:53.06 |
-01:27:31.4 |
HIP 107939 |
15.95 |
| 2026-04-12 12:00 |
21:52:58.27 |
-01:26:38.6 |
HIP 107939 |
16.44 |
| 2026-04-13 00:00 |
21:53:03.44 |
-01:25:46.0 |
HIP 108019 |
16.30 |
| 2026-04-13 12:00 |
21:53:08.56 |
-01:24:53.4 |
HIP 108019 |
15.53 |
| 2026-04-14 00:00 |
21:53:13.63 |
-01:24:01.1 |
HIP 108019 |
14.88 |
| 2026-04-14 12:00 |
21:53:18.65 |
-01:23:08.8 |
HIP 108019 |
14.37 |
| 2026-04-15 00:00 |
21:53:23.63 |
-01:22:16.7 |
HIP 108019 |
14.00 |
| 2026-04-15 12:00 |
21:53:28.55 |
-01:21:24.7 |
HIP 108019 |
13.78 |
| 2026-04-16 00:00 |
21:53:33.42 |
-01:20:32.8 |
HIP 108019 |
13.72 |