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) |
| 2026-05-12 00:00 |
11:38:18.07 |
-28:41:43.4 |
HIP 56713 |
12.45 |
| 2026-05-12 12:00 |
11:38:14.89 |
-28:40:58.7 |
HIP 56713 |
12.59 |
| 2026-05-13 00:00 |
11:38:11.75 |
-28:40:14.1 |
HIP 56713 |
12.81 |
| 2026-05-13 12:00 |
11:38:08.64 |
-28:39:29.4 |
HIP 56713 |
13.12 |
| 2026-05-14 00:00 |
11:38:05.58 |
-28:38:44.9 |
HIP 56713 |
13.49 |
| 2026-05-14 12:00 |
11:38:02.55 |
-28:38:00.3 |
HIP 56713 |
13.93 |
| 2026-05-15 00:00 |
11:37:59.57 |
-28:37:15.8 |
HIP 56713 |
14.43 |
| 2026-05-15 12:00 |
11:37:56.62 |
-28:36:31.3 |
HIP 56713 |
14.97 |
| 2026-05-16 00:00 |
11:37:53.72 |
-28:35:46.9 |
HIP 56713 |
15.56 |
| 2026-05-16 12:00 |
11:37:50.86 |
-28:35:02.6 |
HIP 56713 |
16.19 |
| 2026-05-17 00:00 |
11:37:48.04 |
-28:34:18.3 |
HIP 56713 |
16.85 |
| 2026-05-17 12:00 |
11:37:45.26 |
-28:33:34.0 |
HIP 56762 |
17.19 |
| 2026-05-18 00:00 |
11:37:42.52 |
-28:32:49.9 |
HIP 56762 |
16.72 |
| 2026-05-18 12:00 |
11:37:39.82 |
-28:32:05.8 |
HIP 56762 |
16.30 |
| 2026-05-19 00:00 |
11:37:37.16 |
-28:31:21.7 |
HIP 56762 |
15.92 |
| 2026-05-19 12:00 |
11:37:34.55 |
-28:30:37.8 |
HIP 56762 |
15.58 |
| 2026-05-20 00:00 |
11:37:31.98 |
-28:29:53.9 |
HIP 56762 |
15.29 |
| 2026-05-20 12:00 |
11:37:29.45 |
-28:29:10.1 |
HIP 56733 |
14.94 |
| 2026-05-21 00:00 |
11:37:26.96 |
-28:28:26.4 |
HIP 56733 |
14.50 |
| 2026-05-21 12:00 |
11:37:24.51 |
-28:27:42.8 |
HIP 56733 |
14.10 |
| 2026-05-22 00:00 |
11:37:22.11 |
-28:26:59.3 |
HIP 56733 |
13.75 |
| 2026-05-22 12:00 |
11:37:19.74 |
-28:26:15.9 |
HIP 56733 |
13.45 |
| 2026-05-23 00:00 |
11:37:17.42 |
-28:25:32.5 |
HIP 56733 |
13.19 |
| 2026-05-23 12:00 |
11:37:15.14 |
-28:24:49.3 |
HIP 56733 |
12.98 |
| 2026-05-24 00:00 |
11:37:12.91 |
-28:24:06.2 |
HIP 56733 |
12.83 |
| 2026-05-24 12:00 |
11:37:10.71 |
-28:23:23.2 |
HIP 56733 |
12.72 |
| 2026-05-25 00:00 |
11:37:08.56 |
-28:22:40.3 |
HIP 56733 |
12.67 |
| 2026-05-25 12:00 |
11:37:06.46 |
-28:21:57.6 |
HIP 56733 |
12.67 |
| 2026-05-26 00:00 |
11:37:04.39 |
-28:21:14.9 |
HIP 56733 |
12.72 |
| 2026-05-26 12:00 |
11:37:02.37 |
-28:20:32.4 |
HIP 56733 |
12.81 |
| 2026-05-27 00:00 |
11:37:00.38 |
-28:19:50.0 |
HIP 56733 |
12.96 |
| 2026-05-27 12:00 |
11:36:58.45 |
-28:19:07.7 |
HIP 56733 |
13.14 |
| 2026-05-28 00:00 |
11:36:56.55 |
-28:18:25.6 |
HIP 56733 |
13.36 |
| 2026-05-28 12:00 |
11:36:54.70 |
-28:17:43.6 |
HIP 56733 |
13.63 |
| 2026-05-29 00:00 |
11:36:52.89 |
-28:17:01.8 |
HIP 56733 |
13.92 |
| 2026-05-29 12:00 |
11:36:51.12 |
-28:16:20.0 |
HIP 56733 |
14.24 |
| 2026-05-30 00:00 |
11:36:49.39 |
-28:15:38.5 |
HIP 56733 |
14.60 |
| 2026-05-30 12:00 |
11:36:47.71 |
-28:14:57.0 |
HIP 56733 |
14.97 |
| 2026-05-31 00:00 |
11:36:46.07 |
-28:14:15.7 |
HIP 56733 |
15.37 |
| 2026-05-31 12:00 |
11:36:44.47 |
-28:13:34.6 |
HIP 56733 |
15.78 |
| 2026-06-01 00:00 |
11:36:42.92 |
-28:12:53.7 |
HIP 56733 |
16.21 |
| 2026-06-01 12:00 |
11:36:41.41 |
-28:12:12.8 |
HIP 56733 |
16.66 |
| 2026-06-02 00:00 |
11:36:39.94 |
-28:11:32.2 |
HIP 56733 |
17.12 |