メタデータ
| 項目 |
値 |
| Designation |
C/2008 Q3 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-06-23T02:14:05.628480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:22Z |
| Obs used |
701 |
| NEO |
- |
| M1 |
6.300 |
| 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) |
2009-08-27.0000000 |
| e |
0.99979780 |
| q (au) |
1.798229 |
| a (au) |
8893.448410 |
| i (deg) |
140.706611 |
| Ω (om, deg) |
219.734004 |
| ω (w, deg) |
340.855249 |
| M (ma, deg) |
0.000076 |
等級
散乱 + 全体線形
$$
M_a = (6.290 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.290 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2008-08-27 |
2009-06-22 |
+8.4849 |
-4.214 |
| 2009-06-23 |
2009-12-15 |
+8.2759 |
-4.371 |
| 2009-12-15 |
2010-06-03 |
-2.7074 |
+1.180 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
04:47:57.39 |
+48:41:05.2 |
HIP 22331 |
10.41 |
| 2026-05-12 12:00 |
04:48:01.69 |
+48:41:00.2 |
HIP 22331 |
9.94 |
| 2026-05-13 00:00 |
04:48:06.01 |
+48:40:55.4 |
HIP 22331 |
9.50 |
| 2026-05-13 12:00 |
04:48:10.33 |
+48:40:50.8 |
HIP 22331 |
9.10 |
| 2026-05-14 00:00 |
04:48:14.68 |
+48:40:46.3 |
HIP 22331 |
8.74 |
| 2026-05-14 12:00 |
04:48:19.03 |
+48:40:42.1 |
HIP 22331 |
8.43 |
| 2026-05-15 00:00 |
04:48:23.40 |
+48:40:38.0 |
HIP 22331 |
8.18 |
| 2026-05-15 12:00 |
04:48:27.79 |
+48:40:34.1 |
HIP 22331 |
7.98 |
| 2026-05-16 00:00 |
04:48:32.18 |
+48:40:30.4 |
HIP 22331 |
7.85 |
| 2026-05-16 12:00 |
04:48:36.59 |
+48:40:26.9 |
HIP 22331 |
7.79 |
| 2026-05-17 00:00 |
04:48:41.01 |
+48:40:23.5 |
HIP 22331 |
7.80 |
| 2026-05-17 12:00 |
04:48:45.44 |
+48:40:20.3 |
HIP 22331 |
7.89 |
| 2026-05-18 00:00 |
04:48:49.88 |
+48:40:17.3 |
HIP 22331 |
8.04 |
| 2026-05-18 12:00 |
04:48:54.33 |
+48:40:14.5 |
HIP 22331 |
8.26 |
| 2026-05-19 00:00 |
04:48:58.79 |
+48:40:11.9 |
HIP 22331 |
8.54 |
| 2026-05-19 12:00 |
04:49:03.26 |
+48:40:09.4 |
HIP 22331 |
8.88 |
| 2026-05-20 00:00 |
04:49:07.74 |
+48:40:07.1 |
HIP 22331 |
9.27 |
| 2026-05-20 12:00 |
04:49:12.24 |
+48:40:05.0 |
HIP 22331 |
9.70 |
| 2026-05-21 00:00 |
04:49:16.74 |
+48:40:03.1 |
HIP 22331 |
10.17 |
| 2026-05-21 12:00 |
04:49:21.24 |
+48:40:01.4 |
HIP 22331 |
10.68 |
| 2026-05-22 00:00 |
04:49:25.76 |
+48:39:59.8 |
HIP 22331 |
11.21 |
| 2026-05-22 12:00 |
04:49:30.29 |
+48:39:58.4 |
HIP 22331 |
11.77 |
| 2026-05-23 00:00 |
04:49:34.82 |
+48:39:57.2 |
HIP 22331 |
12.36 |
| 2026-05-23 12:00 |
04:49:39.36 |
+48:39:56.1 |
HIP 22331 |
12.96 |
| 2026-05-24 00:00 |
04:49:43.91 |
+48:39:55.3 |
HIP 22331 |
13.58 |
| 2026-05-24 12:00 |
04:49:48.46 |
+48:39:54.6 |
HIP 22545 |
14.10 |
| 2026-05-25 00:00 |
04:49:53.02 |
+48:39:54.1 |
HIP 22545 |
13.39 |
| 2026-05-25 12:00 |
04:49:57.59 |
+48:39:53.7 |
HIP 22545 |
12.69 |
| 2026-05-26 00:00 |
04:50:02.16 |
+48:39:53.6 |
HIP 22545 |
11.99 |
| 2026-05-26 12:00 |
04:50:06.74 |
+48:39:53.6 |
HIP 22545 |
11.29 |
| 2026-05-27 00:00 |
04:50:11.33 |
+48:39:53.8 |
HIP 22545 |
10.60 |
| 2026-05-27 12:00 |
04:50:15.91 |
+48:39:54.1 |
HIP 22545 |
9.92 |
| 2026-05-28 00:00 |
04:50:20.51 |
+48:39:54.7 |
HIP 22545 |
9.25 |
| 2026-05-28 12:00 |
04:50:25.11 |
+48:39:55.4 |
HIP 22545 |
8.59 |
| 2026-05-29 00:00 |
04:50:29.71 |
+48:39:56.2 |
HIP 22545 |
7.95 |
| 2026-05-29 12:00 |
04:50:34.31 |
+48:39:57.3 |
HIP 22545 |
7.32 |
| 2026-05-30 00:00 |
04:50:38.92 |
+48:39:58.5 |
HIP 22545 |
6.72 |
| 2026-05-30 12:00 |
04:50:43.54 |
+48:40:00.0 |
HIP 22545 |
6.16 |
| 2026-05-31 00:00 |
04:50:48.15 |
+48:40:01.5 |
HIP 22545 |
5.64 |
| 2026-05-31 12:00 |
04:50:52.77 |
+48:40:03.2 |
HIP 22545 |
5.18 |
| 2026-06-01 00:00 |
04:50:57.39 |
+48:40:05.1 |
HIP 22545 |
4.79 |
| 2026-06-01 12:00 |
04:51:02.02 |
+48:40:07.2 |
HIP 22545 |
4.49 |
| 2026-06-02 00:00 |
04:51:06.64 |
+48:40:09.5 |
HIP 22545 |
4.31 |