メタデータ
| 項目 |
値 |
| Designation |
C/2017 E3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2017-06-06T23:41:41.795520Z |
| Orbit solution date (soln_date, UTC) |
2022-07-19T01:12:15Z |
| Obs used |
620 |
| NEO |
- |
| M1 |
5.700 |
| K1 |
10.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-03-26.0000000 |
| e |
1.01291206 |
| q (au) |
5.926129 |
| a (au) |
-458.960808 |
| i (deg) |
70.717015 |
| Ω (om, deg) |
220.742632 |
| ω (w, deg) |
334.279194 |
| M (ma, deg) |
0.029271 |
等級
散乱 + 全体線形
$$
M_a = (5.638 + 3.939\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
5.638 |
| n |
3.939 |
| gf |
0.887 |
| gb |
-0.947 |
| k |
1.000 |
| δ90 |
6.118 |
| 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) |
| 2026-06-01 00:00 |
19:20:06.67 |
+51:34:35.0 |
HIP 94814 |
27.60 |
| 2026-06-01 12:00 |
19:20:00.80 |
+51:35:30.1 |
HIP 94814 |
27.29 |
| 2026-06-02 00:00 |
19:19:54.88 |
+51:36:24.6 |
HIP 94814 |
27.03 |
| 2026-06-02 12:00 |
19:19:48.90 |
+51:37:18.5 |
HIP 94814 |
26.82 |
| 2026-06-03 00:00 |
19:19:42.87 |
+51:38:11.7 |
HIP 94814 |
26.65 |
| 2026-06-03 12:00 |
19:19:36.79 |
+51:39:04.4 |
HIP 94814 |
26.54 |
| 2026-06-04 00:00 |
19:19:30.66 |
+51:39:56.5 |
HIP 94814 |
26.47 |
| 2026-06-04 12:00 |
19:19:24.49 |
+51:40:47.9 |
HIP 94814 |
26.46 |
| 2026-06-05 00:00 |
19:19:18.26 |
+51:41:38.7 |
HIP 94814 |
26.50 |
| 2026-06-05 12:00 |
19:19:11.98 |
+51:42:28.9 |
HIP 94814 |
26.58 |
| 2026-06-06 00:00 |
19:19:05.66 |
+51:43:18.5 |
HIP 94814 |
26.72 |
| 2026-06-06 12:00 |
19:18:59.29 |
+51:44:07.4 |
HIP 94814 |
26.90 |
| 2026-06-07 00:00 |
19:18:52.87 |
+51:44:55.7 |
HIP 94814 |
27.13 |
| 2026-06-07 12:00 |
19:18:46.40 |
+51:45:43.4 |
HIP 94814 |
27.41 |
| 2026-06-08 00:00 |
19:18:39.89 |
+51:46:30.4 |
HIP 94814 |
27.73 |
| 2026-06-08 12:00 |
19:18:33.34 |
+51:47:16.8 |
HIP 94896 |
27.59 |
| 2026-06-09 00:00 |
19:18:26.73 |
+51:48:02.5 |
HIP 94896 |
26.89 |
| 2026-06-09 12:00 |
19:18:20.09 |
+51:48:47.6 |
HIP 94896 |
26.24 |
| 2026-06-10 00:00 |
19:18:13.40 |
+51:49:32.0 |
HIP 94896 |
25.66 |
| 2026-06-10 12:00 |
19:18:06.67 |
+51:50:15.8 |
HIP 94896 |
25.14 |
| 2026-06-11 00:00 |
19:17:59.90 |
+51:50:58.9 |
HIP 94896 |
24.68 |
| 2026-06-11 12:00 |
19:17:53.08 |
+51:51:41.3 |
HIP 94896 |
24.29 |
| 2026-06-12 00:00 |
19:17:46.23 |
+51:52:23.0 |
HIP 94896 |
23.98 |
| 2026-06-12 12:00 |
19:17:39.33 |
+51:53:04.1 |
HIP 94896 |
23.74 |
| 2026-06-13 00:00 |
19:17:32.40 |
+51:53:44.5 |
HIP 94896 |
23.58 |
| 2026-06-13 12:00 |
19:17:25.42 |
+51:54:24.2 |
HIP 94896 |
23.50 |
| 2026-06-14 00:00 |
19:17:18.41 |
+51:55:03.2 |
HIP 94896 |
23.50 |
| 2026-06-14 12:00 |
19:17:11.36 |
+51:55:41.6 |
HIP 94896 |
23.57 |
| 2026-06-15 00:00 |
19:17:04.28 |
+51:56:19.2 |
HIP 94896 |
23.73 |
| 2026-06-15 12:00 |
19:16:57.15 |
+51:56:56.2 |
HIP 94896 |
23.97 |
| 2026-06-16 00:00 |
19:16:50.00 |
+51:57:32.4 |
HIP 94896 |
24.27 |
| 2026-06-16 12:00 |
19:16:42.81 |
+51:58:08.0 |
HIP 94896 |
24.65 |
| 2026-06-17 00:00 |
19:16:35.58 |
+51:58:42.8 |
HIP 94896 |
25.10 |
| 2026-06-17 12:00 |
19:16:28.32 |
+51:59:17.0 |
HIP 94896 |
25.61 |
| 2026-06-18 00:00 |
19:16:21.04 |
+51:59:50.4 |
HIP 94896 |
26.19 |
| 2026-06-18 12:00 |
19:16:13.71 |
+52:00:23.1 |
HIP 94896 |
26.82 |
| 2026-06-19 00:00 |
19:16:06.36 |
+52:00:55.2 |
HIP 94896 |
27.50 |
| 2026-06-19 12:00 |
19:15:58.98 |
+52:01:26.5 |
HIP 94896 |
28.23 |
| 2026-06-20 00:00 |
19:15:51.57 |
+52:01:57.1 |
HIP 94896 |
29.00 |
| 2026-06-20 12:00 |
19:15:44.14 |
+52:02:26.9 |
HIP 94896 |
29.81 |
| 2026-06-21 00:00 |
19:15:36.67 |
+52:02:56.1 |
HIP 94896 |
30.66 |
| 2026-06-21 12:00 |
19:15:29.18 |
+52:03:24.5 |
HIP 94896 |
31.55 |
| 2026-06-22 00:00 |
19:15:21.66 |
+52:03:52.2 |
HIP 94896 |
32.46 |