メタデータ
| 項目 |
値 |
| Designation |
P/2013 T1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2013-07-31T06:21:57.487680Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:32:40Z |
| Obs used |
43 |
| NEO |
- |
| M1 |
16.600 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2013-10-08.0000000 |
| e |
0.62326867 |
| q (au) |
2.210495 |
| a (au) |
5.867565 |
| i (deg) |
24.210241 |
| Ω (om, deg) |
10.283835 |
| ω (w, deg) |
345.840008 |
| M (ma, deg) |
4.766435 |
等級
散乱 + 全体線形
$$
M_a = (13.931 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.931 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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 |
15:56:21.71 |
-45:59:38.6 |
HIP 78087 |
20.04 |
| 2026-05-12 12:00 |
15:55:55.32 |
-46:00:32.0 |
HIP 77891 |
19.37 |
| 2026-05-13 00:00 |
15:55:28.77 |
-46:01:23.2 |
HIP 77891 |
15.27 |
| 2026-05-13 12:00 |
15:55:02.09 |
-46:02:12.4 |
HIP 77891 |
11.65 |
| 2026-05-14 00:00 |
15:54:35.27 |
-46:02:59.4 |
HIP 77891 |
9.09 |
| 2026-05-14 12:00 |
15:54:08.32 |
-46:03:44.3 |
HIP 77891 |
8.66 |
| 2026-05-15 00:00 |
15:53:41.25 |
-46:04:27.0 |
HIP 77794 |
10.57 |
| 2026-05-15 12:00 |
15:53:14.06 |
-46:05:07.6 |
HIP 77794 |
8.24 |
| 2026-05-16 00:00 |
15:52:46.76 |
-46:05:46.0 |
HIP 77794 |
8.37 |
| 2026-05-16 12:00 |
15:52:19.34 |
-46:06:22.3 |
HIP 77794 |
10.89 |
| 2026-05-17 00:00 |
15:51:51.83 |
-46:06:56.4 |
HIP 77794 |
14.62 |
| 2026-05-17 12:00 |
15:51:24.21 |
-46:07:28.3 |
HIP 77614 |
13.54 |
| 2026-05-18 00:00 |
15:50:56.50 |
-46:07:58.0 |
HIP 77614 |
11.15 |
| 2026-05-18 12:00 |
15:50:28.71 |
-46:08:25.5 |
HIP 77614 |
10.62 |
| 2026-05-19 00:00 |
15:50:00.84 |
-46:08:50.8 |
HIP 77500 |
11.96 |
| 2026-05-19 12:00 |
15:49:32.89 |
-46:09:13.9 |
HIP 77500 |
10.40 |
| 2026-05-20 00:00 |
15:49:04.87 |
-46:09:34.9 |
HIP 77500 |
11.02 |
| 2026-05-20 12:00 |
15:48:36.79 |
-46:09:53.6 |
HIP 77500 |
13.52 |
| 2026-05-21 00:00 |
15:48:08.65 |
-46:10:10.1 |
HIP 77500 |
17.09 |
| 2026-05-21 12:00 |
15:47:40.46 |
-46:10:24.4 |
HIP 77209 |
20.25 |
| 2026-05-22 00:00 |
15:47:12.23 |
-46:10:36.5 |
HIP 77209 |
15.93 |
| 2026-05-22 12:00 |
15:46:43.95 |
-46:10:46.5 |
HIP 77209 |
12.03 |
| 2026-05-23 00:00 |
15:46:15.63 |
-46:10:54.2 |
HIP 77209 |
9.13 |
| 2026-05-23 12:00 |
15:45:47.29 |
-46:10:59.7 |
HIP 77209 |
8.33 |
| 2026-05-24 00:00 |
15:45:18.92 |
-46:11:03.0 |
HIP 77209 |
10.16 |
| 2026-05-24 12:00 |
15:44:50.54 |
-46:11:04.2 |
HIP 77209 |
13.60 |
| 2026-05-25 00:00 |
15:44:22.14 |
-46:11:03.2 |
HIP 77209 |
17.73 |
| 2026-05-25 12:00 |
15:43:53.74 |
-46:11:00.0 |
HIP 77209 |
22.18 |
| 2026-05-26 00:00 |
15:43:25.33 |
-46:10:54.5 |
HIP 77020 |
23.79 |
| 2026-05-26 12:00 |
15:42:56.92 |
-46:10:47.0 |
HIP 76933 |
22.65 |
| 2026-05-27 00:00 |
15:42:28.53 |
-46:10:37.2 |
HIP 76933 |
22.15 |
| 2026-05-27 12:00 |
15:42:00.15 |
-46:10:25.4 |
HIP 76933 |
22.71 |
| 2026-05-28 00:00 |
15:41:31.79 |
-46:10:11.3 |
HIP 76933 |
24.24 |
| 2026-05-28 12:00 |
15:41:03.46 |
-46:09:55.1 |
HIP 76756 |
24.14 |
| 2026-05-29 00:00 |
15:40:35.16 |
-46:09:36.8 |
HIP 76756 |
22.87 |
| 2026-05-29 12:00 |
15:40:06.89 |
-46:09:16.4 |
HIP 76756 |
22.59 |
| 2026-05-30 00:00 |
15:39:38.67 |
-46:08:53.8 |
HIP 76756 |
23.33 |
| 2026-05-30 12:00 |
15:39:10.49 |
-46:08:29.2 |
HIP 76461 |
23.34 |
| 2026-05-31 00:00 |
15:38:42.37 |
-46:08:02.4 |
HIP 76461 |
18.49 |
| 2026-05-31 12:00 |
15:38:14.31 |
-46:07:33.6 |
HIP 76461 |
13.69 |
| 2026-06-01 00:00 |
15:37:46.30 |
-46:07:02.7 |
HIP 76461 |
8.99 |
| 2026-06-01 12:00 |
15:37:18.37 |
-46:06:29.7 |
HIP 76461 |
4.69 |
| 2026-06-02 00:00 |
15:36:50.52 |
-46:05:54.7 |
HIP 76461 |
3.29 |