メタデータ
| 項目 |
値 |
| Designation |
C/2016 E1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2017-06-01T02:58:04.794240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:23Z |
| Obs used |
166 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
9.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-04-09.0000000 |
| e |
1.00315620 |
| q (au) |
8.176818 |
| a (au) |
-2590.718500 |
| i (deg) |
131.890641 |
| Ω (om, deg) |
233.034543 |
| ω (w, deg) |
47.290330 |
| M (ma, deg) |
-0.000397 |
等級
散乱 + 全体線形
$$
M_a = (0.872 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
0.872 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-1.000 |
| 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) |
| 2026-07-29 00:00 |
05:00:52.78 |
+45:59:13.4 |
HIP 23355 |
7.71 |
| 2026-07-29 12:00 |
05:00:56.86 |
+45:59:31.2 |
HIP 23355 |
7.52 |
| 2026-07-30 00:00 |
05:01:00.89 |
+45:59:49.2 |
HIP 23355 |
7.40 |
| 2026-07-30 12:00 |
05:01:04.87 |
+46:00:07.4 |
HIP 23355 |
7.37 |
| 2026-07-31 00:00 |
05:01:08.80 |
+46:00:25.6 |
HIP 23355 |
7.42 |
| 2026-07-31 12:00 |
05:01:12.67 |
+46:00:44.0 |
HIP 23355 |
7.54 |
| 2026-08-01 00:00 |
05:01:16.50 |
+46:01:02.5 |
HIP 23355 |
7.74 |
| 2026-08-01 12:00 |
05:01:20.27 |
+46:01:21.1 |
HIP 23355 |
8.01 |
| 2026-08-02 00:00 |
05:01:23.99 |
+46:01:39.9 |
HIP 23355 |
8.33 |
| 2026-08-02 12:00 |
05:01:27.65 |
+46:01:58.7 |
HIP 23355 |
8.70 |
| 2026-08-03 00:00 |
05:01:31.27 |
+46:02:17.7 |
HIP 23355 |
9.11 |
| 2026-08-03 12:00 |
05:01:34.82 |
+46:02:36.8 |
HIP 23355 |
9.55 |
| 2026-08-04 00:00 |
05:01:38.33 |
+46:02:56.1 |
HIP 23355 |
10.02 |
| 2026-08-04 12:00 |
05:01:41.78 |
+46:03:15.4 |
HIP 23355 |
10.51 |
| 2026-08-05 00:00 |
05:01:45.17 |
+46:03:34.8 |
HIP 23355 |
11.03 |
| 2026-08-05 12:00 |
05:01:48.51 |
+46:03:54.4 |
HIP 23355 |
11.55 |
| 2026-08-06 00:00 |
05:01:51.80 |
+46:04:14.1 |
HIP 23355 |
12.09 |
| 2026-08-06 12:00 |
05:01:55.03 |
+46:04:33.8 |
HIP 23355 |
12.63 |
| 2026-08-07 00:00 |
05:01:58.20 |
+46:04:53.7 |
HIP 23355 |
13.19 |
| 2026-08-07 12:00 |
05:02:01.31 |
+46:05:13.7 |
HIP 23355 |
13.74 |
| 2026-08-08 00:00 |
05:02:04.37 |
+46:05:33.8 |
HIP 23355 |
14.30 |
| 2026-08-08 12:00 |
05:02:07.37 |
+46:05:54.0 |
HIP 23355 |
14.86 |
| 2026-08-09 00:00 |
05:02:10.31 |
+46:06:14.3 |
HIP 23355 |
15.42 |
| 2026-08-09 12:00 |
05:02:13.19 |
+46:06:34.7 |
HIP 23355 |
15.98 |
| 2026-08-10 00:00 |
05:02:16.02 |
+46:06:55.1 |
HIP 23355 |
16.54 |
| 2026-08-10 12:00 |
05:02:18.78 |
+46:07:15.7 |
HIP 23355 |
17.10 |
| 2026-08-11 00:00 |
05:02:21.48 |
+46:07:36.4 |
HIP 23355 |
17.65 |
| 2026-08-11 12:00 |
05:02:24.13 |
+46:07:57.1 |
HIP 23355 |
18.20 |
| 2026-08-12 00:00 |
05:02:26.71 |
+46:08:17.9 |
HIP 23355 |
18.75 |
| 2026-08-12 12:00 |
05:02:29.24 |
+46:08:38.9 |
HIP 23355 |
19.29 |
| 2026-08-13 00:00 |
05:02:31.70 |
+46:08:59.9 |
HIP 23355 |
19.83 |
| 2026-08-13 12:00 |
05:02:34.10 |
+46:09:20.9 |
HIP 23355 |
20.36 |
| 2026-08-14 00:00 |
05:02:36.44 |
+46:09:42.1 |
HIP 23355 |
20.89 |
| 2026-08-14 12:00 |
05:02:38.71 |
+46:10:03.3 |
HIP 23355 |
21.41 |
| 2026-08-15 00:00 |
05:02:40.92 |
+46:10:24.6 |
HIP 23355 |
21.93 |
| 2026-08-15 12:00 |
05:02:43.07 |
+46:10:46.0 |
HIP 23355 |
22.44 |
| 2026-08-16 00:00 |
05:02:45.16 |
+46:11:07.4 |
HIP 23355 |
22.95 |
| 2026-08-16 12:00 |
05:02:47.19 |
+46:11:29.0 |
HIP 23355 |
23.45 |
| 2026-08-17 00:00 |
05:02:49.15 |
+46:11:50.5 |
HIP 23355 |
23.94 |
| 2026-08-17 12:00 |
05:02:51.04 |
+46:12:12.2 |
HIP 23355 |
24.43 |
| 2026-08-18 00:00 |
05:02:52.87 |
+46:12:33.9 |
HIP 23355 |
24.91 |
| 2026-08-18 12:00 |
05:02:54.64 |
+46:12:55.6 |
HIP 23355 |
25.38 |
| 2026-08-19 00:00 |
05:02:56.34 |
+46:13:17.4 |
HIP 23355 |
25.85 |