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) |
| 2026-07-29 00:00 |
00:01:01.01 |
+13:28:40.0 |
HIP 23 |
14.45 |
| 2026-07-29 12:00 |
00:00:59.16 |
+13:28:40.9 |
HIP 23 |
14.14 |
| 2026-07-30 00:00 |
00:00:57.29 |
+13:28:41.7 |
HIP 23 |
13.83 |
| 2026-07-30 12:00 |
00:00:55.40 |
+13:28:42.3 |
HIP 23 |
13.52 |
| 2026-07-31 00:00 |
00:00:53.48 |
+13:28:42.6 |
HIP 23 |
13.21 |
| 2026-07-31 12:00 |
00:00:51.53 |
+13:28:42.8 |
HIP 23 |
12.91 |
| 2026-08-01 00:00 |
00:00:49.57 |
+13:28:42.8 |
HIP 23 |
12.61 |
| 2026-08-01 12:00 |
00:00:47.58 |
+13:28:42.5 |
HIP 23 |
12.32 |
| 2026-08-02 00:00 |
00:00:45.57 |
+13:28:42.1 |
HIP 23 |
12.03 |
| 2026-08-02 12:00 |
00:00:43.53 |
+13:28:41.4 |
HIP 23 |
11.75 |
| 2026-08-03 00:00 |
00:00:41.48 |
+13:28:40.6 |
HIP 23 |
11.48 |
| 2026-08-03 12:00 |
00:00:39.40 |
+13:28:39.5 |
HIP 23 |
11.22 |
| 2026-08-04 00:00 |
00:00:37.30 |
+13:28:38.2 |
HIP 23 |
10.97 |
| 2026-08-04 12:00 |
00:00:35.18 |
+13:28:36.8 |
HIP 23 |
10.74 |
| 2026-08-05 00:00 |
00:00:33.03 |
+13:28:35.1 |
HIP 23 |
10.52 |
| 2026-08-05 12:00 |
00:00:30.86 |
+13:28:33.3 |
HIP 23 |
10.32 |
| 2026-08-06 00:00 |
00:00:28.67 |
+13:28:31.2 |
HIP 23 |
10.13 |
| 2026-08-06 12:00 |
00:00:26.46 |
+13:28:28.9 |
HIP 23 |
9.97 |
| 2026-08-07 00:00 |
00:00:24.23 |
+13:28:26.4 |
HIP 23 |
9.83 |
| 2026-08-07 12:00 |
00:00:21.98 |
+13:28:23.8 |
HIP 23 |
9.72 |
| 2026-08-08 00:00 |
00:00:19.71 |
+13:28:20.9 |
HIP 23 |
9.63 |
| 2026-08-08 12:00 |
00:00:17.41 |
+13:28:17.8 |
HIP 23 |
9.56 |
| 2026-08-09 00:00 |
00:00:15.10 |
+13:28:14.5 |
HIP 23 |
9.53 |
| 2026-08-09 12:00 |
00:00:12.76 |
+13:28:11.0 |
HIP 23 |
9.53 |
| 2026-08-10 00:00 |
00:00:10.40 |
+13:28:07.4 |
HIP 23 |
9.56 |
| 2026-08-10 12:00 |
00:00:08.03 |
+13:28:03.5 |
HIP 23 |
9.63 |
| 2026-08-11 00:00 |
00:00:05.63 |
+13:27:59.4 |
HIP 23 |
9.72 |
| 2026-08-11 12:00 |
00:00:03.21 |
+13:27:55.1 |
HIP 23 |
9.85 |
| 2026-08-12 00:00 |
00:00:00.78 |
+13:27:50.6 |
HIP 23 |
10.01 |
| 2026-08-12 12:00 |
23:59:58.32 |
+13:27:45.9 |
HIP 23 |
10.21 |
| 2026-08-13 00:00 |
23:59:55.84 |
+13:27:41.1 |
HIP 23 |
10.43 |
| 2026-08-13 12:00 |
23:59:53.35 |
+13:27:36.0 |
HIP 23 |
10.68 |
| 2026-08-14 00:00 |
23:59:50.84 |
+13:27:30.7 |
HIP 23 |
10.97 |
| 2026-08-14 12:00 |
23:59:48.31 |
+13:27:25.2 |
HIP 23 |
11.28 |
| 2026-08-15 00:00 |
23:59:45.75 |
+13:27:19.5 |
HIP 23 |
11.61 |
| 2026-08-15 12:00 |
23:59:43.19 |
+13:27:13.7 |
HIP 23 |
11.97 |
| 2026-08-16 00:00 |
23:59:40.60 |
+13:27:07.6 |
HIP 23 |
12.35 |
| 2026-08-16 12:00 |
23:59:37.99 |
+13:27:01.3 |
HIP 23 |
12.76 |
| 2026-08-17 00:00 |
23:59:35.37 |
+13:26:54.9 |
HIP 23 |
13.18 |
| 2026-08-17 12:00 |
23:59:32.73 |
+13:26:48.2 |
HIP 23 |
13.62 |
| 2026-08-18 00:00 |
23:59:30.08 |
+13:26:41.4 |
HIP 23 |
14.09 |
| 2026-08-18 12:00 |
23:59:27.40 |
+13:26:34.4 |
HIP 23 |
14.56 |
| 2026-08-19 00:00 |
23:59:24.71 |
+13:26:27.1 |
HIP 23 |
15.06 |