259P/Garradd
メタデータ
| 項目 |
値 |
| Designation |
259P/Garradd |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-01-25T05:54:24.387840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:08Z |
| Obs used |
68 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
22.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-02-26.0000000 |
| e |
0.34152970 |
| q (au) |
1.795939 |
| a (au) |
2.727441 |
| i (deg) |
15.898537 |
| Ω (om, deg) |
51.969696 |
| ω (w, deg) |
256.590906 |
| M (ma, deg) |
206.996592 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-02-03 00:00 |
16:52:42.37 |
-22:45:00.9 |
HIP 82524 |
13.29 |
| 2026-02-03 12:00 |
16:53:41.81 |
-22:48:49.1 |
HIP 82627 |
21.23 |
| 2026-02-04 00:00 |
16:54:41.28 |
-22:52:36.7 |
HIP 82812 |
10.52 |
| 2026-02-04 12:00 |
16:55:40.79 |
-22:56:23.6 |
HIP 82812 |
4.81 |
| 2026-02-05 00:00 |
16:56:40.33 |
-23:00:09.8 |
HIP 82925 |
9.03 |
| 2026-02-05 12:00 |
16:57:39.90 |
-23:03:55.3 |
HIP 82925 |
12.97 |
| 2026-02-06 00:00 |
16:58:39.51 |
-23:07:40.2 |
HIP 83118 |
15.65 |
| 2026-02-06 12:00 |
16:59:39.14 |
-23:11:24.5 |
HIP 83118 |
12.92 |
| 2026-02-07 00:00 |
17:00:38.81 |
-23:15:08.0 |
HIP 83356 |
20.76 |
| 2026-02-07 12:00 |
17:01:38.51 |
-23:18:51.0 |
HIP 83356 |
7.11 |
| 2026-02-08 00:00 |
17:02:38.24 |
-23:22:33.3 |
HIP 83356 |
8.59 |
| 2026-02-08 12:00 |
17:03:37.99 |
-23:26:15.0 |
HIP 83488 |
11.07 |
| 2026-02-09 00:00 |
17:04:37.78 |
-23:29:56.0 |
HIP 83542 |
6.89 |
| 2026-02-09 12:00 |
17:05:37.59 |
-23:33:36.4 |
HIP 83542 |
18.96 |
| 2026-02-10 00:00 |
17:06:37.43 |
-23:37:16.2 |
HIP 83734 |
30.12 |
| 2026-02-10 12:00 |
17:07:37.29 |
-23:40:55.3 |
HIP 83911 |
26.23 |
| 2026-02-11 00:00 |
17:08:37.18 |
-23:44:33.9 |
HIP 83911 |
15.77 |
| 2026-02-11 12:00 |
17:09:37.10 |
-23:48:11.8 |
HIP 84007 |
11.49 |
| 2026-02-12 00:00 |
17:10:37.03 |
-23:51:49.1 |
HIP 84007 |
10.22 |
| 2026-02-12 12:00 |
17:11:36.99 |
-23:55:25.9 |
HIP 83981 |
21.81 |
| 2026-02-13 00:00 |
17:12:36.98 |
-23:59:02.0 |
HIP 84261 |
13.44 |
| 2026-02-13 12:00 |
17:13:36.98 |
-24:02:37.5 |
HIP 84284 |
2.12 |
| 2026-02-14 00:00 |
17:14:37.00 |
-24:06:12.5 |
HIP 84284 |
12.04 |
| 2026-02-14 12:00 |
17:15:37.04 |
-24:09:46.9 |
HIP 84319 |
22.36 |
| 2026-02-15 00:00 |
17:16:37.10 |
-24:13:20.7 |
HIP 84625 |
19.40 |
| 2026-02-15 12:00 |
17:17:37.18 |
-24:16:53.9 |
HIP 84625 |
5.35 |
| 2026-02-16 00:00 |
17:18:37.27 |
-24:20:26.6 |
HIP 84626 |
8.93 |
| 2026-02-16 12:00 |
17:19:37.38 |
-24:23:58.8 |
HIP 84626 |
23.03 |
| 2026-02-17 00:00 |
17:20:37.51 |
-24:27:30.4 |
HIP 84861 |
14.78 |
| 2026-02-17 12:00 |
17:21:37.65 |
-24:31:01.4 |
HIP 84907 |
12.10 |
| 2026-02-18 00:00 |
17:22:37.80 |
-24:34:31.9 |
HIP 84907 |
21.50 |
| 2026-02-18 12:00 |
17:23:37.96 |
-24:38:01.9 |
HIP 85246 |
22.46 |
| 2026-02-19 00:00 |
17:24:38.14 |
-24:41:31.4 |
HIP 85246 |
13.43 |
| 2026-02-19 12:00 |
17:25:38.32 |
-24:45:00.4 |
HIP 85246 |
15.95 |
| 2026-02-20 00:00 |
17:26:38.52 |
-24:48:28.9 |
HIP 85440 |
15.77 |
| 2026-02-20 12:00 |
17:27:38.72 |
-24:51:56.9 |
HIP 85440 |
11.88 |
| 2026-02-21 00:00 |
17:28:38.94 |
-24:55:24.4 |
HIP 85440 |
20.76 |
| 2026-02-21 12:00 |
17:29:39.16 |
-24:58:51.4 |
HIP 85440 |
33.43 |
| 2026-02-22 00:00 |
17:30:39.39 |
-25:02:17.9 |
HIP 85882 |
32.76 |
| 2026-02-22 12:00 |
17:31:39.62 |
-25:05:44.0 |
HIP 85882 |
19.33 |
| 2026-02-23 00:00 |
17:32:39.87 |
-25:09:09.7 |
HIP 85882 |
8.35 |
| 2026-02-23 12:00 |
17:33:40.11 |
-25:12:34.9 |
HIP 85882 |
12.70 |
| 2026-02-24 00:00 |
17:34:40.37 |
-25:15:59.7 |
HIP 86038 |
11.52 |