メタデータ
| 項目 |
値 |
| Designation |
C/2010 H1 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2010-06-18T21:49:15.484800Z |
| Orbit solution date (soln_date, UTC) |
2022-07-06T03:12:21Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
17.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-05-03.0000000 |
| e |
0.99965781 |
| q (au) |
2.745494 |
| a (au) |
8023.335869 |
| i (deg) |
36.531182 |
| Ω (om, deg) |
347.383773 |
| ω (w, deg) |
233.823547 |
| M (ma, deg) |
359.999936 |
等級
散乱 + 全体線形
$$
M_a = (15.811 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.811 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.996 |
| 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) |
| 2026-05-12 00:00 |
00:00:25.02 |
+12:50:00.5 |
HIP 153 |
24.70 |
| 2026-05-12 12:00 |
00:00:27.22 |
+12:50:25.5 |
HIP 153 |
24.40 |
| 2026-05-13 00:00 |
00:00:29.41 |
+12:50:50.4 |
HIP 153 |
24.12 |
| 2026-05-13 12:00 |
00:00:31.58 |
+12:51:15.2 |
HIP 153 |
23.87 |
| 2026-05-14 00:00 |
00:00:33.72 |
+12:51:40.0 |
HIP 153 |
23.63 |
| 2026-05-14 12:00 |
00:00:35.85 |
+12:52:04.7 |
HIP 153 |
23.41 |
| 2026-05-15 00:00 |
00:00:37.95 |
+12:52:29.3 |
HIP 153 |
23.21 |
| 2026-05-15 12:00 |
00:00:40.03 |
+12:52:53.8 |
HIP 153 |
23.04 |
| 2026-05-16 00:00 |
00:00:42.08 |
+12:53:18.3 |
HIP 153 |
22.88 |
| 2026-05-16 12:00 |
00:00:44.12 |
+12:53:42.7 |
HIP 153 |
22.75 |
| 2026-05-17 00:00 |
00:00:46.13 |
+12:54:07.0 |
HIP 153 |
22.63 |
| 2026-05-17 12:00 |
00:00:48.12 |
+12:54:31.2 |
HIP 153 |
22.54 |
| 2026-05-18 00:00 |
00:00:50.09 |
+12:54:55.3 |
HIP 153 |
22.46 |
| 2026-05-18 12:00 |
00:00:52.03 |
+12:55:19.4 |
HIP 153 |
22.41 |
| 2026-05-19 00:00 |
00:00:53.96 |
+12:55:43.3 |
HIP 153 |
22.38 |
| 2026-05-19 12:00 |
00:00:55.85 |
+12:56:07.2 |
HIP 153 |
22.36 |
| 2026-05-20 00:00 |
00:00:57.73 |
+12:56:31.0 |
HIP 153 |
22.37 |
| 2026-05-20 12:00 |
00:00:59.58 |
+12:56:54.7 |
HIP 153 |
22.39 |
| 2026-05-21 00:00 |
00:01:01.41 |
+12:57:18.3 |
HIP 153 |
22.43 |
| 2026-05-21 12:00 |
00:01:03.22 |
+12:57:41.8 |
HIP 153 |
22.49 |
| 2026-05-22 00:00 |
00:01:05.00 |
+12:58:05.3 |
HIP 153 |
22.57 |
| 2026-05-22 12:00 |
00:01:06.76 |
+12:58:28.6 |
HIP 153 |
22.66 |
| 2026-05-23 00:00 |
00:01:08.49 |
+12:58:51.8 |
HIP 153 |
22.77 |
| 2026-05-23 12:00 |
00:01:10.20 |
+12:59:14.9 |
HIP 153 |
22.90 |
| 2026-05-24 00:00 |
00:01:11.89 |
+12:59:38.0 |
HIP 153 |
23.04 |
| 2026-05-24 12:00 |
00:01:13.55 |
+13:00:00.9 |
HIP 23 |
23.11 |
| 2026-05-25 00:00 |
00:01:15.19 |
+13:00:23.7 |
HIP 23 |
23.04 |
| 2026-05-25 12:00 |
00:01:16.80 |
+13:00:46.4 |
HIP 23 |
22.99 |
| 2026-05-26 00:00 |
00:01:18.39 |
+13:01:09.1 |
HIP 23 |
22.94 |
| 2026-05-26 12:00 |
00:01:19.96 |
+13:01:31.6 |
HIP 23 |
22.90 |
| 2026-05-27 00:00 |
00:01:21.50 |
+13:01:54.0 |
HIP 23 |
22.88 |
| 2026-05-27 12:00 |
00:01:23.01 |
+13:02:16.3 |
HIP 23 |
22.86 |
| 2026-05-28 00:00 |
00:01:24.50 |
+13:02:38.5 |
HIP 23 |
22.85 |
| 2026-05-28 12:00 |
00:01:25.97 |
+13:03:00.5 |
HIP 23 |
22.85 |
| 2026-05-29 00:00 |
00:01:27.41 |
+13:03:22.5 |
HIP 23 |
22.86 |
| 2026-05-29 12:00 |
00:01:28.83 |
+13:03:44.4 |
HIP 23 |
22.87 |
| 2026-05-30 00:00 |
00:01:30.22 |
+13:04:06.1 |
HIP 23 |
22.90 |
| 2026-05-30 12:00 |
00:01:31.58 |
+13:04:27.7 |
HIP 23 |
22.93 |
| 2026-05-31 00:00 |
00:01:32.92 |
+13:04:49.2 |
HIP 23 |
22.96 |
| 2026-05-31 12:00 |
00:01:34.24 |
+13:05:10.6 |
HIP 23 |
23.01 |
| 2026-06-01 00:00 |
00:01:35.53 |
+13:05:31.9 |
HIP 23 |
23.06 |
| 2026-06-01 12:00 |
00:01:36.79 |
+13:05:53.0 |
HIP 23 |
23.11 |
| 2026-06-02 00:00 |
00:01:38.03 |
+13:06:14.1 |
HIP 23 |
23.17 |