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
$$
M_a = (9.895 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.895 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.854 |
| k |
0.800 |
| δ90 |
9.936 |
| 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 |
09:31:12.33 |
+35:16:07.6 |
HIP 46636 |
8.39 |
| 2026-05-12 12:00 |
09:31:11.53 |
+35:15:43.7 |
HIP 46636 |
8.43 |
| 2026-05-13 00:00 |
09:31:10.77 |
+35:15:19.6 |
HIP 46636 |
8.51 |
| 2026-05-13 12:00 |
09:31:10.07 |
+35:14:55.3 |
HIP 46636 |
8.61 |
| 2026-05-14 00:00 |
09:31:09.42 |
+35:14:30.9 |
HIP 46636 |
8.74 |
| 2026-05-14 12:00 |
09:31:08.82 |
+35:14:06.3 |
HIP 46636 |
8.90 |
| 2026-05-15 00:00 |
09:31:08.27 |
+35:13:41.6 |
HIP 46735 |
8.97 |
| 2026-05-15 12:00 |
09:31:07.77 |
+35:13:16.7 |
HIP 46735 |
8.68 |
| 2026-05-16 00:00 |
09:31:07.32 |
+35:12:51.6 |
HIP 46735 |
8.40 |
| 2026-05-16 12:00 |
09:31:06.92 |
+35:12:26.4 |
HIP 46735 |
8.13 |
| 2026-05-17 00:00 |
09:31:06.57 |
+35:12:01.0 |
HIP 46735 |
7.86 |
| 2026-05-17 12:00 |
09:31:06.27 |
+35:11:35.5 |
HIP 46735 |
7.59 |
| 2026-05-18 00:00 |
09:31:06.02 |
+35:11:09.9 |
HIP 46735 |
7.33 |
| 2026-05-18 12:00 |
09:31:05.82 |
+35:10:44.1 |
HIP 46735 |
7.08 |
| 2026-05-19 00:00 |
09:31:05.67 |
+35:10:18.1 |
HIP 46735 |
6.83 |
| 2026-05-19 12:00 |
09:31:05.57 |
+35:09:52.1 |
HIP 46735 |
6.60 |
| 2026-05-20 00:00 |
09:31:05.52 |
+35:09:25.8 |
HIP 46735 |
6.38 |
| 2026-05-20 12:00 |
09:31:05.52 |
+35:08:59.5 |
HIP 46735 |
6.17 |
| 2026-05-21 00:00 |
09:31:05.57 |
+35:08:33.0 |
HIP 46735 |
5.97 |
| 2026-05-21 12:00 |
09:31:05.67 |
+35:08:06.4 |
HIP 46735 |
5.80 |
| 2026-05-22 00:00 |
09:31:05.81 |
+35:07:39.7 |
HIP 46735 |
5.64 |
| 2026-05-22 12:00 |
09:31:06.01 |
+35:07:12.8 |
HIP 46735 |
5.50 |
| 2026-05-23 00:00 |
09:31:06.25 |
+35:06:45.9 |
HIP 46735 |
5.39 |
| 2026-05-23 12:00 |
09:31:06.54 |
+35:06:18.8 |
HIP 46735 |
5.30 |
| 2026-05-24 00:00 |
09:31:06.88 |
+35:05:51.6 |
HIP 46735 |
5.24 |
| 2026-05-24 12:00 |
09:31:07.26 |
+35:05:24.2 |
HIP 46735 |
5.21 |
| 2026-05-25 00:00 |
09:31:07.70 |
+35:04:56.8 |
HIP 46735 |
5.22 |
| 2026-05-25 12:00 |
09:31:08.18 |
+35:04:29.3 |
HIP 46735 |
5.26 |
| 2026-05-26 00:00 |
09:31:08.71 |
+35:04:01.6 |
HIP 46735 |
5.33 |
| 2026-05-26 12:00 |
09:31:09.28 |
+35:03:33.9 |
HIP 46735 |
5.43 |
| 2026-05-27 00:00 |
09:31:09.90 |
+35:03:06.0 |
HIP 46735 |
5.56 |
| 2026-05-27 12:00 |
09:31:10.57 |
+35:02:38.0 |
HIP 46735 |
5.73 |
| 2026-05-28 00:00 |
09:31:11.28 |
+35:02:10.0 |
HIP 46735 |
5.93 |
| 2026-05-28 12:00 |
09:31:12.05 |
+35:01:41.8 |
HIP 46735 |
6.15 |
| 2026-05-29 00:00 |
09:31:12.85 |
+35:01:13.6 |
HIP 46735 |
6.40 |
| 2026-05-29 12:00 |
09:31:13.70 |
+35:00:45.3 |
HIP 46735 |
6.67 |
| 2026-05-30 00:00 |
09:31:14.60 |
+35:00:16.8 |
HIP 46735 |
6.96 |
| 2026-05-30 12:00 |
09:31:15.54 |
+34:59:48.3 |
HIP 46735 |
7.28 |
| 2026-05-31 00:00 |
09:31:16.53 |
+34:59:19.7 |
HIP 46735 |
7.61 |
| 2026-05-31 12:00 |
09:31:17.57 |
+34:58:51.0 |
HIP 46735 |
7.97 |
| 2026-06-01 00:00 |
09:31:18.64 |
+34:58:22.3 |
HIP 46735 |
8.33 |
| 2026-06-01 12:00 |
09:31:19.77 |
+34:57:53.4 |
HIP 46735 |
8.72 |
| 2026-06-02 00:00 |
09:31:20.93 |
+34:57:24.5 |
HIP 46735 |
9.11 |