メタデータ
| 項目 |
値 |
| Designation |
C/2015 WZ (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2016-04-15T19:10:55.200000Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:17Z |
| Obs used |
373 |
| NEO |
- |
| M1 |
10.400 |
| K1 |
25.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2016-05-03.0000000 |
| e |
0.99287381 |
| q (au) |
1.376638 |
| a (au) |
193.179952 |
| i (deg) |
134.134938 |
| Ω (om, deg) |
40.045810 |
| ω (w, deg) |
66.710648 |
| M (ma, deg) |
0.006314 |
等級
散乱 + 全体線形
$$
M_a = (8.676 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.676 |
| n |
6.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
11:45:10.00 |
-27:38:17.6 |
HIP 57243 |
17.14 |
| 2026-09-20 12:00 |
11:45:14.37 |
-27:38:43.5 |
HIP 57243 |
18.12 |
| 2026-09-21 00:00 |
11:45:18.73 |
-27:39:09.6 |
HIP 57243 |
19.11 |
| 2026-09-21 12:00 |
11:45:23.10 |
-27:39:36.0 |
HIP 57243 |
20.11 |
| 2026-09-22 00:00 |
11:45:27.46 |
-27:40:02.7 |
HIP 57243 |
21.12 |
| 2026-09-22 12:00 |
11:45:31.82 |
-27:40:29.6 |
HIP 57421 |
20.46 |
| 2026-09-23 00:00 |
11:45:36.18 |
-27:40:56.8 |
HIP 57421 |
19.58 |
| 2026-09-23 12:00 |
11:45:40.54 |
-27:41:24.3 |
HIP 57421 |
18.70 |
| 2026-09-24 00:00 |
11:45:44.89 |
-27:41:52.0 |
HIP 57421 |
17.85 |
| 2026-09-24 12:00 |
11:45:49.24 |
-27:42:19.9 |
HIP 57421 |
17.01 |
| 2026-09-25 00:00 |
11:45:53.58 |
-27:42:48.1 |
HIP 57421 |
16.20 |
| 2026-09-25 12:00 |
11:45:57.92 |
-27:43:16.5 |
HIP 57421 |
15.42 |
| 2026-09-26 00:00 |
11:46:02.25 |
-27:43:45.2 |
HIP 57421 |
14.66 |
| 2026-09-26 12:00 |
11:46:06.59 |
-27:44:14.2 |
HIP 57421 |
13.95 |
| 2026-09-27 00:00 |
11:46:10.91 |
-27:44:43.3 |
HIP 57421 |
13.28 |
| 2026-09-27 12:00 |
11:46:15.23 |
-27:45:12.7 |
HIP 57421 |
12.67 |
| 2026-09-28 00:00 |
11:46:19.54 |
-27:45:42.4 |
HIP 57421 |
12.11 |
| 2026-09-28 12:00 |
11:46:23.85 |
-27:46:12.3 |
HIP 57421 |
11.62 |
| 2026-09-29 00:00 |
11:46:28.15 |
-27:46:42.4 |
HIP 57421 |
11.21 |
| 2026-09-29 12:00 |
11:46:32.45 |
-27:47:12.8 |
HIP 57421 |
10.89 |
| 2026-09-30 00:00 |
11:46:36.74 |
-27:47:43.4 |
HIP 57421 |
10.66 |
| 2026-09-30 12:00 |
11:46:41.02 |
-27:48:14.2 |
HIP 57421 |
10.54 |
| 2026-10-01 00:00 |
11:46:45.29 |
-27:48:45.3 |
HIP 57421 |
10.52 |
| 2026-10-01 12:00 |
11:46:49.56 |
-27:49:16.6 |
HIP 57421 |
10.60 |
| 2026-10-02 00:00 |
11:46:53.82 |
-27:49:48.1 |
HIP 57421 |
10.79 |
| 2026-10-02 12:00 |
11:46:58.07 |
-27:50:19.8 |
HIP 57421 |
11.07 |
| 2026-10-03 00:00 |
11:47:02.31 |
-27:50:51.8 |
HIP 57421 |
11.45 |
| 2026-10-03 12:00 |
11:47:06.54 |
-27:51:24.0 |
HIP 57421 |
11.91 |
| 2026-10-04 00:00 |
11:47:10.77 |
-27:51:56.4 |
HIP 57421 |
12.44 |
| 2026-10-04 12:00 |
11:47:14.98 |
-27:52:29.0 |
HIP 57421 |
13.04 |
| 2026-10-05 00:00 |
11:47:19.19 |
-27:53:01.9 |
HIP 57421 |
13.69 |
| 2026-10-05 12:00 |
11:47:23.38 |
-27:53:34.9 |
HIP 57421 |
14.39 |
| 2026-10-06 00:00 |
11:47:27.56 |
-27:54:08.2 |
HIP 57421 |
15.13 |
| 2026-10-06 12:00 |
11:47:31.74 |
-27:54:41.7 |
HIP 57421 |
15.90 |
| 2026-10-07 00:00 |
11:47:35.90 |
-27:55:15.4 |
HIP 57421 |
16.71 |
| 2026-10-07 12:00 |
11:47:40.05 |
-27:55:49.3 |
HIP 57421 |
17.54 |
| 2026-10-08 00:00 |
11:47:44.19 |
-27:56:23.4 |
HIP 57421 |
18.40 |
| 2026-10-08 12:00 |
11:47:48.32 |
-27:56:57.7 |
HIP 57421 |
19.27 |
| 2026-10-09 00:00 |
11:47:52.43 |
-27:57:32.2 |
HIP 57421 |
20.16 |
| 2026-10-09 12:00 |
11:47:56.53 |
-27:58:06.9 |
HIP 57421 |
21.07 |
| 2026-10-10 00:00 |
11:48:00.62 |
-27:58:41.8 |
HIP 57560 |
20.75 |
| 2026-10-10 12:00 |
11:48:04.70 |
-27:59:16.9 |
HIP 57560 |
20.26 |
| 2026-10-11 00:00 |
11:48:08.76 |
-27:59:52.1 |
HIP 57560 |
19.81 |