メタデータ
| 項目 |
値 |
| Designation |
C/2010 E1 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-11-07T23:08:12.848640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
143 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
9.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-03-31.0000000 |
| e |
0.97588616 |
| q (au) |
2.662197 |
| a (au) |
110.401201 |
| i (deg) |
71.697804 |
| Ω (om, deg) |
169.292426 |
| ω (w, deg) |
296.986669 |
| M (ma, deg) |
0.121531 |
等級
散乱 + 全体線形
$$
M_a = (13.469 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.469 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-09-25 00:00 |
17:09:03.94 |
+48:22:08.5 |
HIP 83780 |
16.95 |
| 2026-09-25 12:00 |
17:09:05.66 |
+48:21:19.6 |
HIP 83780 |
17.35 |
| 2026-09-26 00:00 |
17:09:07.43 |
+48:20:30.8 |
HIP 83780 |
17.78 |
| 2026-09-26 12:00 |
17:09:09.23 |
+48:19:42.1 |
HIP 83780 |
18.25 |
| 2026-09-27 00:00 |
17:09:11.08 |
+48:18:53.5 |
HIP 83780 |
18.75 |
| 2026-09-27 12:00 |
17:09:12.98 |
+48:18:05.0 |
HIP 83780 |
19.29 |
| 2026-09-28 00:00 |
17:09:14.91 |
+48:17:16.6 |
HIP 83780 |
19.85 |
| 2026-09-28 12:00 |
17:09:16.89 |
+48:16:28.4 |
HIP 83780 |
20.44 |
| 2026-09-29 00:00 |
17:09:18.90 |
+48:15:40.2 |
HIP 83780 |
21.06 |
| 2026-09-29 12:00 |
17:09:20.96 |
+48:14:52.2 |
HIP 83780 |
21.70 |
| 2026-09-30 00:00 |
17:09:23.06 |
+48:14:04.3 |
HIP 83780 |
22.36 |
| 2026-09-30 12:00 |
17:09:25.21 |
+48:13:16.6 |
HIP 83780 |
23.04 |
| 2026-10-01 00:00 |
17:09:27.39 |
+48:12:28.9 |
HIP 83780 |
23.74 |
| 2026-10-01 12:00 |
17:09:29.61 |
+48:11:41.4 |
HIP 83780 |
24.45 |
| 2026-10-02 00:00 |
17:09:31.88 |
+48:10:54.1 |
HIP 83780 |
25.18 |
| 2026-10-02 12:00 |
17:09:34.18 |
+48:10:06.9 |
HIP 83780 |
25.92 |
| 2026-10-03 00:00 |
17:09:36.53 |
+48:09:19.8 |
HIP 83780 |
26.68 |
| 2026-10-03 12:00 |
17:09:38.92 |
+48:08:32.9 |
HIP 83780 |
27.45 |
| 2026-10-04 00:00 |
17:09:41.35 |
+48:07:46.1 |
HIP 83780 |
28.22 |
| 2026-10-04 12:00 |
17:09:43.81 |
+48:06:59.5 |
HIP 83780 |
29.01 |
| 2026-10-05 00:00 |
17:09:46.32 |
+48:06:13.1 |
HIP 83887 |
29.78 |
| 2026-10-05 12:00 |
17:09:48.87 |
+48:05:26.8 |
HIP 83887 |
29.21 |
| 2026-10-06 00:00 |
17:09:51.46 |
+48:04:40.6 |
HIP 83887 |
28.67 |
| 2026-10-06 12:00 |
17:09:54.09 |
+48:03:54.7 |
HIP 83887 |
28.15 |
| 2026-10-07 00:00 |
17:09:56.75 |
+48:03:08.9 |
HIP 83887 |
27.66 |
| 2026-10-07 12:00 |
17:09:59.46 |
+48:02:23.3 |
HIP 83887 |
27.19 |
| 2026-10-08 00:00 |
17:10:02.21 |
+48:01:37.9 |
HIP 83887 |
26.74 |
| 2026-10-08 12:00 |
17:10:04.99 |
+48:00:52.6 |
HIP 83887 |
26.33 |
| 2026-10-09 00:00 |
17:10:07.82 |
+48:00:07.6 |
HIP 83887 |
25.95 |
| 2026-10-09 12:00 |
17:10:10.68 |
+47:59:22.7 |
HIP 83887 |
25.59 |
| 2026-10-10 00:00 |
17:10:13.58 |
+47:58:38.0 |
HIP 83887 |
25.27 |
| 2026-10-10 12:00 |
17:10:16.52 |
+47:57:53.5 |
HIP 83887 |
24.99 |
| 2026-10-11 00:00 |
17:10:19.50 |
+47:57:09.3 |
HIP 83887 |
24.74 |
| 2026-10-11 12:00 |
17:10:22.51 |
+47:56:25.2 |
HIP 83887 |
24.52 |
| 2026-10-12 00:00 |
17:10:25.56 |
+47:55:41.3 |
HIP 83887 |
24.35 |
| 2026-10-12 12:00 |
17:10:28.65 |
+47:54:57.7 |
HIP 83887 |
24.21 |
| 2026-10-13 00:00 |
17:10:31.78 |
+47:54:14.2 |
HIP 83887 |
24.12 |
| 2026-10-13 12:00 |
17:10:34.94 |
+47:53:31.0 |
HIP 83887 |
24.06 |
| 2026-10-14 00:00 |
17:10:38.14 |
+47:52:48.0 |
HIP 83887 |
24.04 |
| 2026-10-14 12:00 |
17:10:41.38 |
+47:52:05.2 |
HIP 83887 |
24.07 |
| 2026-10-15 00:00 |
17:10:44.65 |
+47:51:22.6 |
HIP 83887 |
24.13 |
| 2026-10-15 12:00 |
17:10:47.96 |
+47:50:40.3 |
HIP 83887 |
24.24 |
| 2026-10-16 00:00 |
17:10:51.31 |
+47:49:58.2 |
HIP 83887 |
24.39 |