メタデータ
| 項目 |
値 |
| Designation |
C/2006 O2 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-10-05T09:45:32.495040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:58Z |
| Obs used |
84 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
5.750 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2006-09-06.0000000 |
| e |
0.99635182 |
| q (au) |
1.554794 |
| a (au) |
426.184127 |
| i (deg) |
43.028733 |
| Ω (om, deg) |
283.358310 |
| ω (w, deg) |
19.984383 |
| M (ma, deg) |
359.996706 |
等級
散乱 + 全体線形
$$
M_a = (15.817 + 3.338\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.817 |
| n |
3.338 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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) |
| 2026-09-20 00:00 |
06:57:25.16 |
+24:24:21.6 |
HIP 33397 |
10.75 |
| 2026-09-20 12:00 |
06:57:26.10 |
+24:24:20.2 |
HIP 33397 |
10.91 |
| 2026-09-21 00:00 |
06:57:27.01 |
+24:24:18.8 |
HIP 33397 |
11.07 |
| 2026-09-21 12:00 |
06:57:27.89 |
+24:24:17.5 |
HIP 33397 |
11.22 |
| 2026-09-22 00:00 |
06:57:28.75 |
+24:24:16.2 |
HIP 33397 |
11.36 |
| 2026-09-22 12:00 |
06:57:29.58 |
+24:24:14.9 |
HIP 33397 |
11.51 |
| 2026-09-23 00:00 |
06:57:30.38 |
+24:24:13.7 |
HIP 33397 |
11.65 |
| 2026-09-23 12:00 |
06:57:31.16 |
+24:24:12.5 |
HIP 33397 |
11.79 |
| 2026-09-24 00:00 |
06:57:31.91 |
+24:24:11.4 |
HIP 33397 |
11.92 |
| 2026-09-24 12:00 |
06:57:32.64 |
+24:24:10.3 |
HIP 33397 |
12.05 |
| 2026-09-25 00:00 |
06:57:33.33 |
+24:24:09.2 |
HIP 33397 |
12.18 |
| 2026-09-25 12:00 |
06:57:34.00 |
+24:24:08.2 |
HIP 33397 |
12.30 |
| 2026-09-26 00:00 |
06:57:34.65 |
+24:24:07.2 |
HIP 33397 |
12.42 |
| 2026-09-26 12:00 |
06:57:35.26 |
+24:24:06.2 |
HIP 33397 |
12.53 |
| 2026-09-27 00:00 |
06:57:35.85 |
+24:24:05.3 |
HIP 33397 |
12.64 |
| 2026-09-27 12:00 |
06:57:36.41 |
+24:24:04.4 |
HIP 33397 |
12.75 |
| 2026-09-28 00:00 |
06:57:36.95 |
+24:24:03.6 |
HIP 33397 |
12.85 |
| 2026-09-28 12:00 |
06:57:37.46 |
+24:24:02.8 |
HIP 33397 |
12.94 |
| 2026-09-29 00:00 |
06:57:37.94 |
+24:24:02.0 |
HIP 33397 |
13.03 |
| 2026-09-29 12:00 |
06:57:38.39 |
+24:24:01.3 |
HIP 33397 |
13.12 |
| 2026-09-30 00:00 |
06:57:38.82 |
+24:24:00.6 |
HIP 33397 |
13.20 |
| 2026-09-30 12:00 |
06:57:39.21 |
+24:24:00.0 |
HIP 33397 |
13.27 |
| 2026-10-01 00:00 |
06:57:39.58 |
+24:23:59.4 |
HIP 33397 |
13.34 |
| 2026-10-01 12:00 |
06:57:39.93 |
+24:23:58.8 |
HIP 33397 |
13.41 |
| 2026-10-02 00:00 |
06:57:40.24 |
+24:23:58.3 |
HIP 33397 |
13.47 |
| 2026-10-02 12:00 |
06:57:40.53 |
+24:23:57.8 |
HIP 33397 |
13.52 |
| 2026-10-03 00:00 |
06:57:40.79 |
+24:23:57.3 |
HIP 33397 |
13.57 |
| 2026-10-03 12:00 |
06:57:41.02 |
+24:23:56.9 |
HIP 33397 |
13.62 |
| 2026-10-04 00:00 |
06:57:41.22 |
+24:23:56.5 |
HIP 33397 |
13.65 |
| 2026-10-04 12:00 |
06:57:41.40 |
+24:23:56.2 |
HIP 33397 |
13.69 |
| 2026-10-05 00:00 |
06:57:41.55 |
+24:23:55.9 |
HIP 33397 |
13.72 |
| 2026-10-05 12:00 |
06:57:41.67 |
+24:23:55.6 |
HIP 33397 |
13.74 |
| 2026-10-06 00:00 |
06:57:41.76 |
+24:23:55.4 |
HIP 33397 |
13.76 |
| 2026-10-06 12:00 |
06:57:41.82 |
+24:23:55.2 |
HIP 33397 |
13.77 |
| 2026-10-07 00:00 |
06:57:41.86 |
+24:23:55.0 |
HIP 33397 |
13.77 |
| 2026-10-07 12:00 |
06:57:41.87 |
+24:23:54.9 |
HIP 33397 |
13.77 |
| 2026-10-08 00:00 |
06:57:41.84 |
+24:23:54.9 |
HIP 33397 |
13.77 |
| 2026-10-08 12:00 |
06:57:41.79 |
+24:23:54.8 |
HIP 33397 |
13.76 |
| 2026-10-09 00:00 |
06:57:41.72 |
+24:23:54.8 |
HIP 33397 |
13.74 |
| 2026-10-09 12:00 |
06:57:41.61 |
+24:23:54.9 |
HIP 33397 |
13.72 |
| 2026-10-10 00:00 |
06:57:41.48 |
+24:23:55.0 |
HIP 33397 |
13.69 |
| 2026-10-10 12:00 |
06:57:41.31 |
+24:23:55.1 |
HIP 33397 |
13.66 |
| 2026-10-11 00:00 |
06:57:41.12 |
+24:23:55.2 |
HIP 33397 |
13.62 |