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
$$
M_a = (0.858 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
0.858 |
| n |
6.000 |
| gf |
0.999 |
| 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) |
| 2026-03-26 00:00 |
04:36:55.88 |
+46:43:20.0 |
HIP 21661 |
29.56 |
| 2026-03-26 12:00 |
04:36:58.36 |
+46:42:34.8 |
HIP 21661 |
28.74 |
| 2026-03-27 00:00 |
04:37:00.90 |
+46:41:49.8 |
HIP 21661 |
27.92 |
| 2026-03-27 12:00 |
04:37:03.51 |
+46:41:05.1 |
HIP 21661 |
27.09 |
| 2026-03-28 00:00 |
04:37:06.18 |
+46:40:20.7 |
HIP 21661 |
26.27 |
| 2026-03-28 12:00 |
04:37:08.92 |
+46:39:36.5 |
HIP 21661 |
25.43 |
| 2026-03-29 00:00 |
04:37:11.72 |
+46:38:52.6 |
HIP 21661 |
24.60 |
| 2026-03-29 12:00 |
04:37:14.59 |
+46:38:09.0 |
HIP 21661 |
23.76 |
| 2026-03-30 00:00 |
04:37:17.51 |
+46:37:25.7 |
HIP 21661 |
22.92 |
| 2026-03-30 12:00 |
04:37:20.50 |
+46:36:42.6 |
HIP 21661 |
22.08 |
| 2026-03-31 00:00 |
04:37:23.55 |
+46:35:59.9 |
HIP 21661 |
21.24 |
| 2026-03-31 12:00 |
04:37:26.66 |
+46:35:17.4 |
HIP 21661 |
20.39 |
| 2026-04-01 00:00 |
04:37:29.83 |
+46:34:35.2 |
HIP 21661 |
19.54 |
| 2026-04-01 12:00 |
04:37:33.06 |
+46:33:53.2 |
HIP 21661 |
18.69 |
| 2026-04-02 00:00 |
04:37:36.35 |
+46:33:11.6 |
HIP 21661 |
17.83 |
| 2026-04-02 12:00 |
04:37:39.70 |
+46:32:30.2 |
HIP 21661 |
16.97 |
| 2026-04-03 00:00 |
04:37:43.11 |
+46:31:49.1 |
HIP 21661 |
16.12 |
| 2026-04-03 12:00 |
04:37:46.58 |
+46:31:08.3 |
HIP 21661 |
15.26 |
| 2026-04-04 00:00 |
04:37:50.10 |
+46:30:27.8 |
HIP 21661 |
14.39 |
| 2026-04-04 12:00 |
04:37:53.69 |
+46:29:47.6 |
HIP 21661 |
13.53 |
| 2026-04-05 00:00 |
04:37:57.33 |
+46:29:07.6 |
HIP 21661 |
12.67 |
| 2026-04-05 12:00 |
04:38:01.02 |
+46:28:28.0 |
HIP 21661 |
11.81 |
| 2026-04-06 00:00 |
04:38:04.78 |
+46:27:48.6 |
HIP 21661 |
10.95 |
| 2026-04-06 12:00 |
04:38:08.59 |
+46:27:09.5 |
HIP 21661 |
10.09 |
| 2026-04-07 00:00 |
04:38:12.45 |
+46:26:30.7 |
HIP 21661 |
9.24 |
| 2026-04-07 12:00 |
04:38:16.37 |
+46:25:52.2 |
HIP 21661 |
8.40 |
| 2026-04-08 00:00 |
04:38:20.34 |
+46:25:14.0 |
HIP 21661 |
7.57 |
| 2026-04-08 12:00 |
04:38:24.37 |
+46:24:36.1 |
HIP 21661 |
6.76 |
| 2026-04-09 00:00 |
04:38:28.46 |
+46:23:58.5 |
HIP 21661 |
5.98 |
| 2026-04-09 12:00 |
04:38:32.59 |
+46:23:21.2 |
HIP 21661 |
5.24 |
| 2026-04-10 00:00 |
04:38:36.78 |
+46:22:44.2 |
HIP 21661 |
4.57 |
| 2026-04-10 12:00 |
04:38:41.02 |
+46:22:07.4 |
HIP 21661 |
4.01 |
| 2026-04-11 00:00 |
04:38:45.32 |
+46:21:31.0 |
HIP 21661 |
3.60 |
| 2026-04-11 12:00 |
04:38:49.66 |
+46:20:54.8 |
HIP 21661 |
3.41 |
| 2026-04-12 00:00 |
04:38:54.06 |
+46:20:19.0 |
HIP 21661 |
3.47 |
| 2026-04-12 12:00 |
04:38:58.51 |
+46:19:43.5 |
HIP 21661 |
3.78 |
| 2026-04-13 00:00 |
04:39:03.01 |
+46:19:08.2 |
HIP 21661 |
4.29 |
| 2026-04-13 12:00 |
04:39:07.55 |
+46:18:33.3 |
HIP 21661 |
4.94 |
| 2026-04-14 00:00 |
04:39:12.15 |
+46:17:58.6 |
HIP 21661 |
5.67 |
| 2026-04-14 12:00 |
04:39:16.80 |
+46:17:24.3 |
HIP 21661 |
6.48 |
| 2026-04-15 00:00 |
04:39:21.49 |
+46:16:50.2 |
HIP 21661 |
7.32 |
| 2026-04-15 12:00 |
04:39:26.24 |
+46:16:16.5 |
HIP 21661 |
8.20 |
| 2026-04-16 00:00 |
04:39:31.03 |
+46:15:43.0 |
HIP 21661 |
9.10 |