メタデータ
| 項目 |
値 |
| Designation |
436P/Garradd |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-09-27T18:17:01.438080Z |
| Orbit solution date (soln_date, UTC) |
2022-12-08T23:43:50Z |
| Obs used |
113 |
| NEO |
- |
| M1 |
11.300 |
| K1 |
23.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2021-10-24T10:16:59.808000Z |
| Discovery magnitude (MPC) |
19.40 T |
| Discovery observatory (MPC) |
Q62 · iTelescope Observatory, Siding Spring |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-04-11.0000000 |
| e |
0.67183664 |
| q (au) |
1.923695 |
| a (au) |
5.862005 |
| i (deg) |
20.206219 |
| Ω (om, deg) |
87.397920 |
| ω (w, deg) |
283.069780 |
| M (ma, deg) |
89.668749 |
等級
散乱 + 全体線形
$$
M_a = (12.835 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.835 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:03:47.36 |
+19:27:11.8 |
HIP 58818 |
4.20 |
| 2026-09-20 12:00 |
12:04:01.07 |
+19:25:49.5 |
HIP 58818 |
3.85 |
| 2026-09-21 00:00 |
12:04:14.78 |
+19:24:27.6 |
HIP 58818 |
6.06 |
| 2026-09-21 12:00 |
12:04:28.49 |
+19:23:06.1 |
HIP 58818 |
9.12 |
| 2026-09-22 00:00 |
12:04:42.20 |
+19:21:45.0 |
HIP 58818 |
12.42 |
| 2026-09-22 12:00 |
12:04:55.91 |
+19:20:24.3 |
HIP 58939 |
13.14 |
| 2026-09-23 00:00 |
12:05:09.62 |
+19:19:04.1 |
HIP 58939 |
14.21 |
| 2026-09-23 12:00 |
12:05:23.32 |
+19:17:44.3 |
HIP 58939 |
15.99 |
| 2026-09-24 00:00 |
12:05:37.03 |
+19:16:24.9 |
HIP 58939 |
18.26 |
| 2026-09-24 12:00 |
12:05:50.74 |
+19:15:06.0 |
HIP 58939 |
20.87 |
| 2026-09-25 00:00 |
12:06:04.44 |
+19:13:47.5 |
HIP 59121 |
19.97 |
| 2026-09-25 12:00 |
12:06:18.14 |
+19:12:29.5 |
HIP 59121 |
17.61 |
| 2026-09-26 00:00 |
12:06:31.84 |
+19:11:11.8 |
HIP 59121 |
15.68 |
| 2026-09-26 12:00 |
12:06:45.53 |
+19:09:54.7 |
HIP 59121 |
14.34 |
| 2026-09-27 00:00 |
12:06:59.22 |
+19:08:38.0 |
HIP 59121 |
13.76 |
| 2026-09-27 12:00 |
12:07:12.90 |
+19:07:21.7 |
HIP 59152 |
13.75 |
| 2026-09-28 00:00 |
12:07:26.58 |
+19:06:05.9 |
HIP 59152 |
10.81 |
| 2026-09-28 12:00 |
12:07:40.26 |
+19:04:50.6 |
HIP 59152 |
8.29 |
| 2026-09-29 00:00 |
12:07:53.92 |
+19:03:35.8 |
HIP 59152 |
6.69 |
| 2026-09-29 12:00 |
12:08:07.58 |
+19:02:21.4 |
HIP 59152 |
6.71 |
| 2026-09-30 00:00 |
12:08:21.24 |
+19:01:07.4 |
HIP 59152 |
8.31 |
| 2026-09-30 12:00 |
12:08:34.88 |
+18:59:54.0 |
HIP 59152 |
10.82 |
| 2026-10-01 00:00 |
12:08:48.52 |
+18:58:41.0 |
HIP 59152 |
13.75 |
| 2026-10-01 12:00 |
12:09:02.15 |
+18:57:28.5 |
HIP 59310 |
14.80 |
| 2026-10-02 00:00 |
12:09:15.77 |
+18:56:16.5 |
HIP 59310 |
11.77 |
| 2026-10-02 12:00 |
12:09:29.38 |
+18:55:05.0 |
HIP 59310 |
9.03 |
| 2026-10-03 00:00 |
12:09:42.98 |
+18:53:54.0 |
HIP 59310 |
6.94 |
| 2026-10-03 12:00 |
12:09:56.57 |
+18:52:43.5 |
HIP 59310 |
6.18 |
| 2026-10-04 00:00 |
12:10:10.14 |
+18:51:33.5 |
HIP 59310 |
7.17 |
| 2026-10-04 12:00 |
12:10:23.71 |
+18:50:24.0 |
HIP 59310 |
9.38 |
| 2026-10-05 00:00 |
12:10:37.26 |
+18:49:15.0 |
HIP 59310 |
12.14 |
| 2026-10-05 12:00 |
12:10:50.80 |
+18:48:06.5 |
HIP 59391 |
10.94 |
| 2026-10-06 00:00 |
12:11:04.33 |
+18:46:58.5 |
HIP 59391 |
9.48 |
| 2026-10-06 12:00 |
12:11:17.84 |
+18:45:51.1 |
HIP 59391 |
9.13 |
| 2026-10-07 00:00 |
12:11:31.34 |
+18:44:44.1 |
HIP 59391 |
9.99 |
| 2026-10-07 12:00 |
12:11:44.82 |
+18:43:37.7 |
HIP 59391 |
11.80 |
| 2026-10-08 00:00 |
12:11:58.28 |
+18:42:31.9 |
HIP 59391 |
14.20 |
| 2026-10-08 12:00 |
12:12:11.73 |
+18:41:26.6 |
HIP 59550 |
12.55 |
| 2026-10-09 00:00 |
12:12:25.17 |
+18:40:21.8 |
HIP 59550 |
9.78 |
| 2026-10-09 12:00 |
12:12:38.58 |
+18:39:17.6 |
HIP 59550 |
7.51 |
| 2026-10-10 00:00 |
12:12:51.98 |
+18:38:13.9 |
HIP 59550 |
6.31 |
| 2026-10-10 12:00 |
12:13:05.35 |
+18:37:10.8 |
HIP 59550 |
6.76 |
| 2026-10-11 00:00 |
12:13:18.71 |
+18:36:08.2 |
HIP 59550 |
8.60 |