メタデータ
| 項目 |
値 |
| Designation |
C/2015 M3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2015-08-26T05:34:05.033280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:13Z |
| Obs used |
150 |
| NEO |
- |
| M1 |
14.700 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-09-03.0000000 |
| e |
0.97327847 |
| q (au) |
3.552414 |
| a (au) |
132.942015 |
| i (deg) |
65.951065 |
| Ω (om, deg) |
143.092842 |
| ω (w, deg) |
123.762544 |
| M (ma, deg) |
0.004995 |
等級
散乱 + 全体線形
$$
M_a = (14.907 + 2.182\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.907 |
| n |
2.182 |
| gf |
0.967 |
| gb |
-0.511 |
| k |
0.800 |
| δ90 |
9.982 |
| 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 |
03:46:36.34 |
-45:20:44.2 |
HIP 17795 |
23.19 |
| 2026-06-01 12:00 |
03:46:43.68 |
-45:20:49.6 |
HIP 17795 |
22.08 |
| 2026-06-02 00:00 |
03:46:51.01 |
-45:20:55.4 |
HIP 17795 |
21.00 |
| 2026-06-02 12:00 |
03:46:58.33 |
-45:21:01.8 |
HIP 17795 |
19.95 |
| 2026-06-03 00:00 |
03:47:05.64 |
-45:21:08.7 |
HIP 17795 |
18.94 |
| 2026-06-03 12:00 |
03:47:12.94 |
-45:21:16.2 |
HIP 17795 |
17.98 |
| 2026-06-04 00:00 |
03:47:20.22 |
-45:21:24.1 |
HIP 17795 |
17.06 |
| 2026-06-04 12:00 |
03:47:27.49 |
-45:21:32.6 |
HIP 17795 |
16.20 |
| 2026-06-05 00:00 |
03:47:34.74 |
-45:21:41.6 |
HIP 17795 |
15.41 |
| 2026-06-05 12:00 |
03:47:41.99 |
-45:21:51.2 |
HIP 17795 |
14.69 |
| 2026-06-06 00:00 |
03:47:49.22 |
-45:22:01.2 |
HIP 17795 |
14.07 |
| 2026-06-06 12:00 |
03:47:56.43 |
-45:22:11.8 |
HIP 17795 |
13.55 |
| 2026-06-07 00:00 |
03:48:03.63 |
-45:22:22.9 |
HIP 17795 |
13.15 |
| 2026-06-07 12:00 |
03:48:10.82 |
-45:22:34.5 |
HIP 17795 |
12.86 |
| 2026-06-08 00:00 |
03:48:17.99 |
-45:22:46.7 |
HIP 17795 |
12.71 |
| 2026-06-08 12:00 |
03:48:25.14 |
-45:22:59.4 |
HIP 17795 |
12.70 |
| 2026-06-09 00:00 |
03:48:32.28 |
-45:23:12.6 |
HIP 17795 |
12.82 |
| 2026-06-09 12:00 |
03:48:39.40 |
-45:23:26.3 |
HIP 17795 |
13.08 |
| 2026-06-10 00:00 |
03:48:46.51 |
-45:23:40.5 |
HIP 17925 |
13.37 |
| 2026-06-10 12:00 |
03:48:53.59 |
-45:23:55.3 |
HIP 17925 |
12.14 |
| 2026-06-11 00:00 |
03:49:00.66 |
-45:24:10.5 |
HIP 17925 |
10.93 |
| 2026-06-11 12:00 |
03:49:07.71 |
-45:24:26.3 |
HIP 17925 |
9.73 |
| 2026-06-12 00:00 |
03:49:14.75 |
-45:24:42.7 |
HIP 17925 |
8.55 |
| 2026-06-12 12:00 |
03:49:21.76 |
-45:24:59.5 |
HIP 17925 |
7.41 |
| 2026-06-13 00:00 |
03:49:28.76 |
-45:25:16.8 |
HIP 17925 |
6.32 |
| 2026-06-13 12:00 |
03:49:35.73 |
-45:25:34.7 |
HIP 17925 |
5.32 |
| 2026-06-14 00:00 |
03:49:42.69 |
-45:25:53.1 |
HIP 17925 |
4.46 |
| 2026-06-14 12:00 |
03:49:49.62 |
-45:26:12.0 |
HIP 17925 |
3.83 |
| 2026-06-15 00:00 |
03:49:56.53 |
-45:26:31.4 |
HIP 17925 |
3.56 |
| 2026-06-15 12:00 |
03:50:03.42 |
-45:26:51.3 |
HIP 17925 |
3.73 |
| 2026-06-16 00:00 |
03:50:10.29 |
-45:27:11.7 |
HIP 17925 |
4.29 |
| 2026-06-16 12:00 |
03:50:17.14 |
-45:27:32.6 |
HIP 17925 |
5.10 |
| 2026-06-17 00:00 |
03:50:23.97 |
-45:27:54.1 |
HIP 17925 |
6.07 |
| 2026-06-17 12:00 |
03:50:30.77 |
-45:28:16.0 |
HIP 17925 |
7.13 |
| 2026-06-18 00:00 |
03:50:37.55 |
-45:28:38.5 |
HIP 17925 |
8.25 |
| 2026-06-18 12:00 |
03:50:44.30 |
-45:29:01.4 |
HIP 17925 |
9.40 |
| 2026-06-19 00:00 |
03:50:51.03 |
-45:29:24.9 |
HIP 17925 |
10.57 |
| 2026-06-19 12:00 |
03:50:57.74 |
-45:29:48.8 |
HIP 17925 |
11.76 |
| 2026-06-20 00:00 |
03:51:04.42 |
-45:30:13.3 |
HIP 17925 |
12.96 |
| 2026-06-20 12:00 |
03:51:11.07 |
-45:30:38.2 |
HIP 17925 |
14.17 |
| 2026-06-21 00:00 |
03:51:17.70 |
-45:31:03.7 |
HIP 18134 |
14.40 |
| 2026-06-21 12:00 |
03:51:24.30 |
-45:31:29.6 |
HIP 18134 |
13.18 |
| 2026-06-22 00:00 |
03:51:30.88 |
-45:31:56.0 |
HIP 18134 |
11.96 |