C/2014 W11 (PANSTARRS)
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) |
| 2026-02-03 00:00 |
21:36:07.11 |
-03:27:12.5 |
HIP 106682 |
21.28 |
| 2026-02-03 12:00 |
21:36:15.43 |
-03:26:27.5 |
HIP 106682 |
20.08 |
| 2026-02-04 00:00 |
21:36:23.75 |
-03:25:42.3 |
HIP 106682 |
19.05 |
| 2026-02-04 12:00 |
21:36:32.08 |
-03:24:56.9 |
HIP 106682 |
18.24 |
| 2026-02-05 00:00 |
21:36:40.42 |
-03:24:11.2 |
HIP 106682 |
17.66 |
| 2026-02-05 12:00 |
21:36:48.76 |
-03:23:25.4 |
HIP 106682 |
17.35 |
| 2026-02-06 00:00 |
21:36:57.10 |
-03:22:39.3 |
HIP 106682 |
17.31 |
| 2026-02-06 12:00 |
21:37:05.45 |
-03:21:53.0 |
HIP 106682 |
17.56 |
| 2026-02-07 00:00 |
21:37:13.80 |
-03:21:06.5 |
HIP 106682 |
18.07 |
| 2026-02-07 12:00 |
21:37:22.16 |
-03:20:19.8 |
HIP 106682 |
18.83 |
| 2026-02-08 00:00 |
21:37:30.51 |
-03:19:32.9 |
HIP 106682 |
19.81 |
| 2026-02-08 12:00 |
21:37:38.87 |
-03:18:45.7 |
HIP 106682 |
20.99 |
| 2026-02-09 00:00 |
21:37:47.23 |
-03:17:58.4 |
HIP 106865 |
21.34 |
| 2026-02-09 12:00 |
21:37:55.59 |
-03:17:10.9 |
HIP 106865 |
20.83 |
| 2026-02-10 00:00 |
21:38:03.95 |
-03:16:23.2 |
HIP 106865 |
20.54 |
| 2026-02-10 12:00 |
21:38:12.31 |
-03:15:35.3 |
HIP 106865 |
20.50 |
| 2026-02-11 00:00 |
21:38:20.67 |
-03:14:47.2 |
HIP 106865 |
20.70 |
| 2026-02-11 12:00 |
21:38:29.03 |
-03:13:58.9 |
HIP 106865 |
21.14 |
| 2026-02-12 00:00 |
21:38:37.39 |
-03:13:10.4 |
HIP 106865 |
21.81 |
| 2026-02-12 12:00 |
21:38:45.75 |
-03:12:21.7 |
HIP 106865 |
22.68 |
| 2026-02-13 00:00 |
21:38:54.10 |
-03:11:32.8 |
HIP 106865 |
23.74 |
| 2026-02-13 12:00 |
21:39:02.45 |
-03:10:43.8 |
HIP 106865 |
24.95 |
| 2026-02-14 00:00 |
21:39:10.80 |
-03:09:54.6 |
HIP 106865 |
26.30 |
| 2026-02-14 12:00 |
21:39:19.15 |
-03:09:05.2 |
HIP 106865 |
27.77 |
| 2026-02-15 00:00 |
21:39:27.49 |
-03:08:15.6 |
HIP 106865 |
29.34 |
| 2026-02-15 12:00 |
21:39:35.83 |
-03:07:25.9 |
HIP 106865 |
30.99 |
| 2026-02-16 00:00 |
21:39:44.16 |
-03:06:35.9 |
HIP 106865 |
32.72 |
| 2026-02-16 12:00 |
21:39:52.48 |
-03:05:45.8 |
HIP 106865 |
34.50 |
| 2026-02-17 00:00 |
21:40:00.80 |
-03:04:55.6 |
HIP 107024 |
34.82 |
| 2026-02-17 12:00 |
21:40:09.11 |
-03:04:05.2 |
HIP 107024 |
33.58 |
| 2026-02-18 00:00 |
21:40:17.42 |
-03:03:14.6 |
HIP 107024 |
32.46 |
| 2026-02-18 12:00 |
21:40:25.72 |
-03:02:23.9 |
HIP 107024 |
31.45 |
| 2026-02-19 00:00 |
21:40:34.01 |
-03:01:33.0 |
HIP 107024 |
30.56 |
| 2026-02-19 12:00 |
21:40:42.29 |
-03:00:42.0 |
HIP 107024 |
29.82 |
| 2026-02-20 00:00 |
21:40:50.57 |
-02:59:50.8 |
HIP 107200 |
29.08 |
| 2026-02-20 12:00 |
21:40:58.83 |
-02:58:59.5 |
HIP 107200 |
26.97 |
| 2026-02-21 00:00 |
21:41:07.08 |
-02:58:08.0 |
HIP 107200 |
24.87 |
| 2026-02-21 12:00 |
21:41:15.33 |
-02:57:16.4 |
HIP 107200 |
22.81 |
| 2026-02-22 00:00 |
21:41:23.56 |
-02:56:24.6 |
HIP 107200 |
20.78 |
| 2026-02-22 12:00 |
21:41:31.78 |
-02:55:32.7 |
HIP 107200 |
18.80 |
| 2026-02-23 00:00 |
21:41:39.99 |
-02:54:40.7 |
HIP 107200 |
16.89 |
| 2026-02-23 12:00 |
21:41:48.19 |
-02:53:48.5 |
HIP 107200 |
15.07 |
| 2026-02-24 00:00 |
21:41:56.38 |
-02:52:56.3 |
HIP 107200 |
13.37 |