メタデータ
| 項目 |
値 |
| Designation |
C/2006 L1 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-10-18T00:03:47.067840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:58Z |
| Obs used |
706 |
| NEO |
- |
| M1 |
8.700 |
| K1 |
21.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-12-13.0000000 |
| e |
0.99734388 |
| q (au) |
1.462070 |
| a (au) |
550.453473 |
| i (deg) |
143.242586 |
| Ω (om, deg) |
101.760169 |
| ω (w, deg) |
338.409780 |
| M (ma, deg) |
0.004274 |
等級
散乱 + 全体線形
$$
M_a = (9.686 + 5.939\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.686 |
| n |
5.939 |
| 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 |
| 2006-06-04 |
2006-10-17 |
+8.2533 |
-2.681 |
| 2006-10-19 |
2006-12-20 |
+22.8616 |
-6.327 |
| 2006-12-20 |
2007-03-14 |
-11.8664 |
+2.379 |
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) |
| 2026-09-25 00:00 |
20:50:58.48 |
+08:02:39.0 |
HIP 102838 |
18.01 |
| 2026-09-25 12:00 |
20:50:56.60 |
+08:02:15.1 |
HIP 102838 |
17.40 |
| 2026-09-26 00:00 |
20:50:54.74 |
+08:01:51.2 |
HIP 102838 |
16.79 |
| 2026-09-26 12:00 |
20:50:52.90 |
+08:01:27.4 |
HIP 102838 |
16.19 |
| 2026-09-27 00:00 |
20:50:51.09 |
+08:01:03.4 |
HIP 102838 |
15.59 |
| 2026-09-27 12:00 |
20:50:49.29 |
+08:00:39.5 |
HIP 102838 |
14.99 |
| 2026-09-28 00:00 |
20:50:47.52 |
+08:00:15.6 |
HIP 102838 |
14.40 |
| 2026-09-28 12:00 |
20:50:45.77 |
+07:59:51.6 |
HIP 102838 |
13.81 |
| 2026-09-29 00:00 |
20:50:44.03 |
+07:59:27.6 |
HIP 102838 |
13.23 |
| 2026-09-29 12:00 |
20:50:42.32 |
+07:59:03.7 |
HIP 102838 |
12.64 |
| 2026-09-30 00:00 |
20:50:40.64 |
+07:58:39.7 |
HIP 102838 |
12.07 |
| 2026-09-30 12:00 |
20:50:38.97 |
+07:58:15.7 |
HIP 102838 |
11.50 |
| 2026-10-01 00:00 |
20:50:37.32 |
+07:57:51.7 |
HIP 102838 |
10.93 |
| 2026-10-01 12:00 |
20:50:35.70 |
+07:57:27.7 |
HIP 102838 |
10.36 |
| 2026-10-02 00:00 |
20:50:34.10 |
+07:57:03.7 |
HIP 102838 |
9.80 |
| 2026-10-02 12:00 |
20:50:32.52 |
+07:56:39.7 |
HIP 102838 |
9.25 |
| 2026-10-03 00:00 |
20:50:30.96 |
+07:56:15.7 |
HIP 102838 |
8.70 |
| 2026-10-03 12:00 |
20:50:29.43 |
+07:55:51.7 |
HIP 102838 |
8.16 |
| 2026-10-04 00:00 |
20:50:27.92 |
+07:55:27.7 |
HIP 102838 |
7.62 |
| 2026-10-04 12:00 |
20:50:26.43 |
+07:55:03.7 |
HIP 102838 |
7.09 |
| 2026-10-05 00:00 |
20:50:24.96 |
+07:54:39.7 |
HIP 102838 |
6.56 |
| 2026-10-05 12:00 |
20:50:23.52 |
+07:54:15.8 |
HIP 102838 |
6.04 |
| 2026-10-06 00:00 |
20:50:22.10 |
+07:53:51.8 |
HIP 102838 |
5.53 |
| 2026-10-06 12:00 |
20:50:20.70 |
+07:53:27.9 |
HIP 102838 |
5.03 |
| 2026-10-07 00:00 |
20:50:19.33 |
+07:53:04.0 |
HIP 102838 |
4.54 |
| 2026-10-07 12:00 |
20:50:17.97 |
+07:52:40.0 |
HIP 102838 |
4.07 |
| 2026-10-08 00:00 |
20:50:16.65 |
+07:52:16.2 |
HIP 102838 |
3.61 |
| 2026-10-08 12:00 |
20:50:15.34 |
+07:51:52.3 |
HIP 102838 |
3.18 |
| 2026-10-09 00:00 |
20:50:14.06 |
+07:51:28.5 |
HIP 102838 |
2.78 |
| 2026-10-09 12:00 |
20:50:12.81 |
+07:51:04.6 |
HIP 102838 |
2.43 |
| 2026-10-10 00:00 |
20:50:11.57 |
+07:50:40.9 |
HIP 102838 |
2.15 |
| 2026-10-10 12:00 |
20:50:10.36 |
+07:50:17.1 |
HIP 102838 |
1.96 |
| 2026-10-11 00:00 |
20:50:09.18 |
+07:49:53.4 |
HIP 102838 |
1.89 |
| 2026-10-11 12:00 |
20:50:08.02 |
+07:49:29.7 |
HIP 102838 |
1.95 |
| 2026-10-12 00:00 |
20:50:06.88 |
+07:49:06.0 |
HIP 102838 |
2.13 |
| 2026-10-12 12:00 |
20:50:05.77 |
+07:48:42.4 |
HIP 102838 |
2.39 |
| 2026-10-13 00:00 |
20:50:04.68 |
+07:48:18.8 |
HIP 102838 |
2.72 |
| 2026-10-13 12:00 |
20:50:03.62 |
+07:47:55.3 |
HIP 102838 |
3.08 |
| 2026-10-14 00:00 |
20:50:02.58 |
+07:47:31.8 |
HIP 102838 |
3.47 |
| 2026-10-14 12:00 |
20:50:01.56 |
+07:47:08.3 |
HIP 102838 |
3.88 |
| 2026-10-15 00:00 |
20:50:00.57 |
+07:46:44.9 |
HIP 102838 |
4.29 |
| 2026-10-15 12:00 |
20:49:59.61 |
+07:46:21.5 |
HIP 102838 |
4.72 |
| 2026-10-16 00:00 |
20:49:58.67 |
+07:45:58.2 |
HIP 102838 |
5.14 |