メタデータ
| 項目 |
値 |
| Designation |
C/2014 M1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-26T12:23:10.953600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:56Z |
| Obs used |
86 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-06-02.0000000 |
| e |
1.00235797 |
| q (au) |
5.576695 |
| a (au) |
-2365.040406 |
| i (deg) |
160.176838 |
| Ω (om, deg) |
234.673281 |
| ω (w, deg) |
336.742114 |
| M (ma, deg) |
-0.000733 |
等級
散乱 + 全体線形
$$
M_a = (9.896 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.896 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.854 |
| k |
0.800 |
| δ90 |
9.999 |
| 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 |
09:45:09.86 |
+33:37:31.4 |
HIP 47739 |
20.99 |
| 2026-09-20 12:00 |
09:45:13.60 |
+33:37:30.1 |
HIP 47739 |
21.57 |
| 2026-09-21 00:00 |
09:45:17.31 |
+33:37:29.1 |
HIP 47739 |
22.16 |
| 2026-09-21 12:00 |
09:45:21.00 |
+33:37:28.3 |
HIP 47739 |
22.76 |
| 2026-09-22 00:00 |
09:45:24.66 |
+33:37:27.9 |
HIP 47739 |
23.36 |
| 2026-09-22 12:00 |
09:45:28.30 |
+33:37:27.7 |
HIP 47739 |
23.98 |
| 2026-09-23 00:00 |
09:45:31.91 |
+33:37:27.8 |
HIP 47739 |
24.60 |
| 2026-09-23 12:00 |
09:45:35.49 |
+33:37:28.1 |
HIP 47739 |
25.22 |
| 2026-09-24 00:00 |
09:45:39.05 |
+33:37:28.8 |
HIP 47739 |
25.85 |
| 2026-09-24 12:00 |
09:45:42.58 |
+33:37:29.7 |
HIP 47739 |
26.49 |
| 2026-09-25 00:00 |
09:45:46.09 |
+33:37:31.0 |
HIP 47739 |
27.12 |
| 2026-09-25 12:00 |
09:45:49.56 |
+33:37:32.5 |
HIP 47739 |
27.76 |
| 2026-09-26 00:00 |
09:45:53.01 |
+33:37:34.2 |
HIP 47739 |
28.40 |
| 2026-09-26 12:00 |
09:45:56.43 |
+33:37:36.3 |
HIP 47739 |
29.04 |
| 2026-09-27 00:00 |
09:45:59.82 |
+33:37:38.7 |
HIP 47739 |
29.68 |
| 2026-09-27 12:00 |
09:46:03.19 |
+33:37:41.3 |
HIP 47739 |
30.32 |
| 2026-09-28 00:00 |
09:46:06.52 |
+33:37:44.2 |
HIP 47739 |
30.96 |
| 2026-09-28 12:00 |
09:46:09.82 |
+33:37:47.4 |
HIP 48003 |
30.88 |
| 2026-09-29 00:00 |
09:46:13.10 |
+33:37:50.9 |
HIP 48003 |
30.68 |
| 2026-09-29 12:00 |
09:46:16.34 |
+33:37:54.7 |
HIP 48003 |
30.50 |
| 2026-09-30 00:00 |
09:46:19.56 |
+33:37:58.7 |
HIP 48003 |
30.34 |
| 2026-09-30 12:00 |
09:46:22.74 |
+33:38:03.1 |
HIP 48003 |
30.21 |
| 2026-10-01 00:00 |
09:46:25.90 |
+33:38:07.7 |
HIP 48003 |
30.09 |
| 2026-10-01 12:00 |
09:46:29.02 |
+33:38:12.6 |
HIP 48003 |
29.99 |
| 2026-10-02 00:00 |
09:46:32.11 |
+33:38:17.8 |
HIP 48003 |
29.92 |
| 2026-10-02 12:00 |
09:46:35.17 |
+33:38:23.3 |
HIP 48003 |
29.86 |
| 2026-10-03 00:00 |
09:46:38.20 |
+33:38:29.1 |
HIP 48003 |
29.83 |
| 2026-10-03 12:00 |
09:46:41.20 |
+33:38:35.2 |
HIP 48003 |
29.81 |
| 2026-10-04 00:00 |
09:46:44.16 |
+33:38:41.6 |
HIP 48003 |
29.81 |
| 2026-10-04 12:00 |
09:46:47.09 |
+33:38:48.2 |
HIP 48003 |
29.84 |
| 2026-10-05 00:00 |
09:46:49.99 |
+33:38:55.2 |
HIP 48106 |
29.80 |
| 2026-10-05 12:00 |
09:46:52.85 |
+33:39:02.4 |
HIP 48106 |
29.48 |
| 2026-10-06 00:00 |
09:46:55.68 |
+33:39:09.9 |
HIP 48106 |
29.18 |
| 2026-10-06 12:00 |
09:46:58.48 |
+33:39:17.8 |
HIP 48106 |
28.89 |
| 2026-10-07 00:00 |
09:47:01.24 |
+33:39:25.9 |
HIP 48106 |
28.63 |
| 2026-10-07 12:00 |
09:47:03.97 |
+33:39:34.3 |
HIP 48106 |
28.38 |
| 2026-10-08 00:00 |
09:47:06.66 |
+33:39:43.0 |
HIP 48106 |
28.15 |
| 2026-10-08 12:00 |
09:47:09.32 |
+33:39:52.0 |
HIP 48106 |
27.94 |
| 2026-10-09 00:00 |
09:47:11.94 |
+33:40:01.3 |
HIP 48106 |
27.74 |
| 2026-10-09 12:00 |
09:47:14.52 |
+33:40:10.9 |
HIP 48106 |
27.57 |
| 2026-10-10 00:00 |
09:47:17.07 |
+33:40:20.7 |
HIP 48106 |
27.41 |
| 2026-10-10 12:00 |
09:47:19.58 |
+33:40:30.9 |
HIP 48106 |
27.28 |
| 2026-10-11 00:00 |
09:47:22.06 |
+33:40:41.4 |
HIP 48106 |
27.16 |