メタデータ
| 項目 |
値 |
| Designation |
296P/Garradd |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-03-01T06:43:40.719360Z |
| Orbit solution date (soln_date, UTC) |
2021-07-01T22:13:08Z |
| Obs used |
333 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
15.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-07-21.0000000 |
| e |
0.47734904 |
| q (au) |
1.830682 |
| a (au) |
3.502686 |
| i (deg) |
25.203980 |
| Ω (om, deg) |
263.676488 |
| ω (w, deg) |
350.027681 |
| M (ma, deg) |
21.307492 |
等級
散乱 + 全体線形
$$
M_a = (12.031 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.031 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-05-12 00:00 |
08:13:11.05 |
-03:05:04.2 |
HIP 40087 |
40.29 |
| 2026-05-12 12:00 |
08:13:36.21 |
-03:04:36.0 |
HIP 40523 |
43.45 |
| 2026-05-13 00:00 |
08:14:01.59 |
-03:04:09.3 |
HIP 40523 |
37.39 |
| 2026-05-13 12:00 |
08:14:27.19 |
-03:03:44.1 |
HIP 40521 |
31.36 |
| 2026-05-14 00:00 |
08:14:53.02 |
-03:03:20.5 |
HIP 40521 |
25.22 |
| 2026-05-14 12:00 |
08:15:19.06 |
-03:02:58.5 |
HIP 40521 |
19.27 |
| 2026-05-15 00:00 |
08:15:45.32 |
-03:02:38.0 |
HIP 40521 |
13.80 |
| 2026-05-15 12:00 |
08:16:11.80 |
-03:02:19.1 |
HIP 40521 |
9.79 |
| 2026-05-16 00:00 |
08:16:38.50 |
-03:02:01.7 |
HIP 40521 |
9.47 |
| 2026-05-16 12:00 |
08:17:05.40 |
-03:01:46.0 |
HIP 40521 |
13.19 |
| 2026-05-17 00:00 |
08:17:32.52 |
-03:01:31.8 |
HIP 40521 |
18.74 |
| 2026-05-17 12:00 |
08:17:59.86 |
-03:01:19.2 |
HIP 40732 |
23.59 |
| 2026-05-18 00:00 |
08:18:27.40 |
-03:01:08.1 |
HIP 40732 |
21.16 |
| 2026-05-18 12:00 |
08:18:55.15 |
-03:00:58.7 |
HIP 40732 |
20.80 |
| 2026-05-19 00:00 |
08:19:23.10 |
-03:00:50.9 |
HIP 40732 |
22.66 |
| 2026-05-19 12:00 |
08:19:51.27 |
-03:00:44.6 |
HIP 40874 |
24.14 |
| 2026-05-20 00:00 |
08:20:19.63 |
-03:00:40.0 |
HIP 40961 |
21.55 |
| 2026-05-20 12:00 |
08:20:48.20 |
-03:00:37.0 |
HIP 40961 |
15.75 |
| 2026-05-21 00:00 |
08:21:16.97 |
-03:00:35.5 |
HIP 40961 |
11.56 |
| 2026-05-21 12:00 |
08:21:45.94 |
-03:00:35.7 |
HIP 40961 |
11.10 |
| 2026-05-22 00:00 |
08:22:15.10 |
-03:00:37.5 |
HIP 40961 |
14.80 |
| 2026-05-22 12:00 |
08:22:44.46 |
-03:00:40.9 |
HIP 41169 |
19.17 |
| 2026-05-23 00:00 |
08:23:14.02 |
-03:00:45.9 |
HIP 41169 |
11.99 |
| 2026-05-23 12:00 |
08:23:43.77 |
-03:00:52.5 |
HIP 41169 |
5.36 |
| 2026-05-24 00:00 |
08:24:13.71 |
-03:01:00.7 |
HIP 41169 |
4.95 |
| 2026-05-24 12:00 |
08:24:43.84 |
-03:01:10.5 |
HIP 41192 |
9.39 |
| 2026-05-25 00:00 |
08:25:14.16 |
-03:01:21.9 |
HIP 41192 |
15.15 |
| 2026-05-25 12:00 |
08:25:44.67 |
-03:01:35.0 |
HIP 41379 |
20.52 |
| 2026-05-26 00:00 |
08:26:15.37 |
-03:01:49.6 |
HIP 41379 |
17.86 |
| 2026-05-26 12:00 |
08:26:46.25 |
-03:02:05.9 |
HIP 41379 |
18.31 |
| 2026-05-27 00:00 |
08:27:17.31 |
-03:02:23.8 |
HIP 41379 |
21.75 |
| 2026-05-27 12:00 |
08:27:48.56 |
-03:02:43.3 |
HIP 41446 |
25.28 |
| 2026-05-28 00:00 |
08:28:19.99 |
-03:03:04.4 |
HIP 41665 |
21.34 |
| 2026-05-28 12:00 |
08:28:51.60 |
-03:03:27.1 |
HIP 41665 |
13.79 |
| 2026-05-29 00:00 |
08:29:23.39 |
-03:03:51.4 |
HIP 41665 |
7.00 |
| 2026-05-29 12:00 |
08:29:55.36 |
-03:04:17.3 |
HIP 41665 |
5.85 |
| 2026-05-30 00:00 |
08:30:27.50 |
-03:04:44.9 |
HIP 41665 |
12.16 |
| 2026-05-30 12:00 |
08:30:59.82 |
-03:05:14.0 |
HIP 41665 |
19.81 |
| 2026-05-31 00:00 |
08:31:32.32 |
-03:05:44.8 |
HIP 41901 |
17.22 |
| 2026-05-31 12:00 |
08:32:04.99 |
-03:06:17.2 |
HIP 41901 |
9.44 |
| 2026-06-01 00:00 |
08:32:37.83 |
-03:06:51.2 |
HIP 41901 |
3.89 |
| 2026-06-01 12:00 |
08:33:10.84 |
-03:07:26.8 |
HIP 41901 |
8.76 |
| 2026-06-02 00:00 |
08:33:44.03 |
-03:08:04.1 |
HIP 41991 |
9.92 |