C/2012 E3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
C/2012 E3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-05-12T22:05:22.326720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:05Z |
| Obs used |
74 |
| NEO |
- |
| M1 |
9.900 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2012-03-29.0000000 |
| e |
0.98271491 |
| q (au) |
3.827319 |
| a (au) |
221.423057 |
| i (deg) |
105.658608 |
| Ω (om, deg) |
5.530998 |
| ω (w, deg) |
103.515422 |
| M (ma, deg) |
0.096047 |
等級
散乱 + 全体線形
$$
M_a = (11.440 + 2.856\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.440 |
| n |
2.856 |
| gf |
0.814 |
| gb |
-0.500 |
| k |
0.976 |
| δ90 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
08:49:01.44 |
-46:51:54.0 |
HIP 43229 |
7.45 |
| 2026-02-03 12:00 |
08:48:55.22 |
-46:51:45.5 |
HIP 43229 |
6.54 |
| 2026-02-04 00:00 |
08:48:49.01 |
-46:51:36.5 |
HIP 43229 |
5.68 |
| 2026-02-04 12:00 |
08:48:42.79 |
-46:51:26.9 |
HIP 43229 |
4.92 |
| 2026-02-05 00:00 |
08:48:36.59 |
-46:51:16.9 |
HIP 43229 |
4.30 |
| 2026-02-05 12:00 |
08:48:30.39 |
-46:51:06.4 |
HIP 43229 |
3.88 |
| 2026-02-06 00:00 |
08:48:24.19 |
-46:50:55.4 |
HIP 43229 |
3.75 |
| 2026-02-06 12:00 |
08:48:18.01 |
-46:50:43.9 |
HIP 43229 |
3.93 |
| 2026-02-07 00:00 |
08:48:11.83 |
-46:50:31.9 |
HIP 43229 |
4.38 |
| 2026-02-07 12:00 |
08:48:05.66 |
-46:50:19.5 |
HIP 43229 |
5.03 |
| 2026-02-08 00:00 |
08:47:59.49 |
-46:50:06.5 |
HIP 43229 |
5.81 |
| 2026-02-08 12:00 |
08:47:53.34 |
-46:49:53.1 |
HIP 43229 |
6.68 |
| 2026-02-09 00:00 |
08:47:47.20 |
-46:49:39.1 |
HIP 43229 |
7.61 |
| 2026-02-09 12:00 |
08:47:41.06 |
-46:49:24.7 |
HIP 43229 |
8.57 |
| 2026-02-10 00:00 |
08:47:34.94 |
-46:49:09.8 |
HIP 43229 |
9.57 |
| 2026-02-10 12:00 |
08:47:28.82 |
-46:48:54.5 |
HIP 43229 |
10.58 |
| 2026-02-11 00:00 |
08:47:22.72 |
-46:48:38.6 |
HIP 43229 |
11.60 |
| 2026-02-11 12:00 |
08:47:16.63 |
-46:48:22.3 |
HIP 43229 |
12.64 |
| 2026-02-12 00:00 |
08:47:10.55 |
-46:48:05.5 |
HIP 43229 |
13.68 |
| 2026-02-12 12:00 |
08:47:04.49 |
-46:47:48.2 |
HIP 43229 |
14.74 |
| 2026-02-13 00:00 |
08:46:58.44 |
-46:47:30.4 |
HIP 43229 |
15.79 |
| 2026-02-13 12:00 |
08:46:52.40 |
-46:47:12.2 |
HIP 43229 |
16.85 |
| 2026-02-14 00:00 |
08:46:46.38 |
-46:46:53.5 |
HIP 43229 |
17.91 |
| 2026-02-14 12:00 |
08:46:40.37 |
-46:46:34.3 |
HIP 43229 |
18.98 |
| 2026-02-15 00:00 |
08:46:34.38 |
-46:46:14.7 |
HIP 43229 |
20.05 |
| 2026-02-15 12:00 |
08:46:28.40 |
-46:45:54.6 |
HIP 43229 |
21.12 |
| 2026-02-16 00:00 |
08:46:22.44 |
-46:45:34.0 |
HIP 43229 |
22.19 |
| 2026-02-16 12:00 |
08:46:16.50 |
-46:45:13.0 |
HIP 43229 |
23.26 |
| 2026-02-17 00:00 |
08:46:10.57 |
-46:44:51.5 |
HIP 43229 |
24.33 |
| 2026-02-17 12:00 |
08:46:04.66 |
-46:44:29.6 |
HIP 43229 |
25.41 |
| 2026-02-18 00:00 |
08:45:58.78 |
-46:44:07.2 |
HIP 42847 |
25.87 |
| 2026-02-18 12:00 |
08:45:52.91 |
-46:43:44.3 |
HIP 42847 |
24.82 |
| 2026-02-19 00:00 |
08:45:47.06 |
-46:43:21.1 |
HIP 42847 |
23.77 |
| 2026-02-19 12:00 |
08:45:41.22 |
-46:42:57.3 |
HIP 42847 |
22.72 |
| 2026-02-20 00:00 |
08:45:35.41 |
-46:42:33.2 |
HIP 42847 |
21.68 |
| 2026-02-20 12:00 |
08:45:29.63 |
-46:42:08.5 |
HIP 42847 |
20.63 |
| 2026-02-21 00:00 |
08:45:23.86 |
-46:41:43.5 |
HIP 42847 |
19.59 |
| 2026-02-21 12:00 |
08:45:18.11 |
-46:41:18.0 |
HIP 42847 |
18.54 |
| 2026-02-22 00:00 |
08:45:12.39 |
-46:40:52.1 |
HIP 42847 |
17.50 |
| 2026-02-22 12:00 |
08:45:06.69 |
-46:40:25.7 |
HIP 42847 |
16.47 |
| 2026-02-23 00:00 |
08:45:01.01 |
-46:39:59.0 |
HIP 42847 |
15.43 |
| 2026-02-23 12:00 |
08:44:55.35 |
-46:39:31.8 |
HIP 42847 |
14.40 |
| 2026-02-24 00:00 |
08:44:49.72 |
-46:39:04.2 |
HIP 42847 |
13.38 |