メタデータ
| 項目 |
値 |
| Designation |
C/2007 Q1 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-12-11T05:36:50.662080Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:11Z |
| Obs used |
45 |
| NEO |
- |
| M1 |
6.900 |
| K1 |
16.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-09-02.0000000 |
| e |
1.00098762 |
| q (au) |
2.989255 |
| a (au) |
-3026.729908 |
| i (deg) |
82.007598 |
| Ω (om, deg) |
5.894732 |
| ω (w, deg) |
282.133141 |
| M (ma, deg) |
0.001567 |
等級
散乱 + 全体線形
$$
M_a = (7.386 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.386 |
| n |
6.000 |
| 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) |
| 2026-03-26 00:00 |
21:57:29.90 |
+65:19:30.1 |
HIP 108226 |
12.41 |
| 2026-03-26 12:00 |
21:57:35.17 |
+65:20:03.0 |
HIP 108226 |
12.98 |
| 2026-03-27 00:00 |
21:57:40.40 |
+65:20:36.1 |
HIP 108226 |
13.57 |
| 2026-03-27 12:00 |
21:57:45.59 |
+65:21:09.5 |
HIP 108226 |
14.17 |
| 2026-03-28 00:00 |
21:57:50.75 |
+65:21:43.2 |
HIP 108603 |
14.44 |
| 2026-03-28 12:00 |
21:57:55.87 |
+65:22:17.1 |
HIP 108603 |
13.77 |
| 2026-03-29 00:00 |
21:58:00.96 |
+65:22:51.3 |
HIP 108603 |
13.11 |
| 2026-03-29 12:00 |
21:58:06.01 |
+65:23:25.8 |
HIP 108603 |
12.47 |
| 2026-03-30 00:00 |
21:58:11.02 |
+65:24:00.5 |
HIP 108603 |
11.85 |
| 2026-03-30 12:00 |
21:58:16.00 |
+65:24:35.5 |
HIP 108603 |
11.25 |
| 2026-03-31 00:00 |
21:58:20.94 |
+65:25:10.7 |
HIP 108603 |
10.68 |
| 2026-03-31 12:00 |
21:58:25.84 |
+65:25:46.2 |
HIP 108603 |
10.14 |
| 2026-04-01 00:00 |
21:58:30.70 |
+65:26:21.9 |
HIP 108603 |
9.64 |
| 2026-04-01 12:00 |
21:58:35.52 |
+65:26:57.9 |
HIP 108603 |
9.18 |
| 2026-04-02 00:00 |
21:58:40.31 |
+65:27:34.1 |
HIP 108603 |
8.78 |
| 2026-04-02 12:00 |
21:58:45.05 |
+65:28:10.6 |
HIP 108603 |
8.43 |
| 2026-04-03 00:00 |
21:58:49.76 |
+65:28:47.3 |
HIP 108603 |
8.15 |
| 2026-04-03 12:00 |
21:58:54.42 |
+65:29:24.3 |
HIP 108603 |
7.94 |
| 2026-04-04 00:00 |
21:58:59.05 |
+65:30:01.5 |
HIP 108603 |
7.81 |
| 2026-04-04 12:00 |
21:59:03.64 |
+65:30:38.9 |
HIP 108603 |
7.77 |
| 2026-04-05 00:00 |
21:59:08.18 |
+65:31:16.6 |
HIP 108603 |
7.81 |
| 2026-04-05 12:00 |
21:59:12.68 |
+65:31:54.5 |
HIP 108603 |
7.93 |
| 2026-04-06 00:00 |
21:59:17.15 |
+65:32:32.6 |
HIP 108603 |
8.14 |
| 2026-04-06 12:00 |
21:59:21.57 |
+65:33:10.9 |
HIP 108603 |
8.42 |
| 2026-04-07 00:00 |
21:59:25.94 |
+65:33:49.5 |
HIP 108603 |
8.76 |
| 2026-04-07 12:00 |
21:59:30.28 |
+65:34:28.3 |
HIP 108603 |
9.17 |
| 2026-04-08 00:00 |
21:59:34.57 |
+65:35:07.3 |
HIP 108603 |
9.63 |
| 2026-04-08 12:00 |
21:59:38.82 |
+65:35:46.6 |
HIP 108603 |
10.13 |
| 2026-04-09 00:00 |
21:59:43.03 |
+65:36:26.0 |
HIP 108603 |
10.68 |
| 2026-04-09 12:00 |
21:59:47.19 |
+65:37:05.7 |
HIP 108603 |
11.25 |
| 2026-04-10 00:00 |
21:59:51.31 |
+65:37:45.5 |
HIP 108603 |
11.86 |
| 2026-04-10 12:00 |
21:59:55.38 |
+65:38:25.6 |
HIP 108603 |
12.49 |
| 2026-04-11 00:00 |
21:59:59.41 |
+65:39:05.9 |
HIP 108603 |
13.14 |
| 2026-04-11 12:00 |
22:00:03.40 |
+65:39:46.4 |
HIP 108603 |
13.81 |
| 2026-04-12 00:00 |
22:00:07.33 |
+65:40:27.0 |
HIP 108603 |
14.49 |
| 2026-04-12 12:00 |
22:00:11.23 |
+65:41:07.9 |
HIP 108603 |
15.19 |
| 2026-04-13 00:00 |
22:00:15.07 |
+65:41:49.0 |
HIP 108603 |
15.90 |
| 2026-04-13 12:00 |
22:00:18.87 |
+65:42:30.3 |
HIP 108603 |
16.62 |
| 2026-04-14 00:00 |
22:00:22.62 |
+65:43:11.7 |
HIP 108603 |
17.34 |
| 2026-04-14 12:00 |
22:00:26.33 |
+65:43:53.4 |
HIP 108603 |
18.08 |
| 2026-04-15 00:00 |
22:00:29.99 |
+65:44:35.2 |
HIP 108603 |
18.82 |
| 2026-04-15 12:00 |
22:00:33.60 |
+65:45:17.2 |
HIP 108603 |
19.57 |
| 2026-04-16 00:00 |
22:00:37.16 |
+65:45:59.4 |
HIP 108688 |
19.13 |