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) |
| 2026-03-26 00:00 |
16:19:47.39 |
-42:42:04.3 |
HIP 79963 |
5.71 |
| 2026-03-26 12:00 |
16:19:45.66 |
-42:44:53.1 |
HIP 79963 |
6.80 |
| 2026-03-27 00:00 |
16:19:43.65 |
-42:47:41.6 |
HIP 79963 |
8.69 |
| 2026-03-27 12:00 |
16:19:41.35 |
-42:50:29.7 |
HIP 79963 |
10.96 |
| 2026-03-28 00:00 |
16:19:38.77 |
-42:53:17.4 |
HIP 79963 |
13.42 |
| 2026-03-28 12:00 |
16:19:35.89 |
-42:56:04.6 |
HIP 79963 |
16.00 |
| 2026-03-29 00:00 |
16:19:32.74 |
-42:58:51.5 |
HIP 79963 |
18.63 |
| 2026-03-29 12:00 |
16:19:29.29 |
-43:01:37.8 |
HIP 79888 |
20.91 |
| 2026-03-30 00:00 |
16:19:25.56 |
-43:04:23.8 |
HIP 79888 |
22.88 |
| 2026-03-30 12:00 |
16:19:21.53 |
-43:07:09.2 |
HIP 79888 |
24.99 |
| 2026-03-31 00:00 |
16:19:17.22 |
-43:09:54.2 |
HIP 79784 |
26.67 |
| 2026-03-31 12:00 |
16:19:12.61 |
-43:12:38.6 |
HIP 79784 |
26.82 |
| 2026-04-01 00:00 |
16:19:07.71 |
-43:15:22.6 |
HIP 79784 |
27.23 |
| 2026-04-01 12:00 |
16:19:02.52 |
-43:18:06.0 |
HIP 79784 |
27.89 |
| 2026-04-02 00:00 |
16:18:57.03 |
-43:20:48.8 |
HIP 80050 |
27.62 |
| 2026-04-02 12:00 |
16:18:51.26 |
-43:23:31.1 |
HIP 80050 |
26.06 |
| 2026-04-03 00:00 |
16:18:45.18 |
-43:26:12.8 |
HIP 80050 |
24.79 |
| 2026-04-03 12:00 |
16:18:38.81 |
-43:28:53.9 |
HIP 80050 |
23.85 |
| 2026-04-04 00:00 |
16:18:32.15 |
-43:31:34.4 |
HIP 79859 |
21.46 |
| 2026-04-04 12:00 |
16:18:25.19 |
-43:34:14.3 |
HIP 79859 |
18.59 |
| 2026-04-05 00:00 |
16:18:17.93 |
-43:36:53.5 |
HIP 79859 |
15.75 |
| 2026-04-05 12:00 |
16:18:10.37 |
-43:39:32.0 |
HIP 79859 |
12.98 |
| 2026-04-06 00:00 |
16:18:02.51 |
-43:42:09.9 |
HIP 79859 |
10.32 |
| 2026-04-06 12:00 |
16:17:54.36 |
-43:44:47.0 |
HIP 79859 |
7.94 |
| 2026-04-07 00:00 |
16:17:45.90 |
-43:47:23.5 |
HIP 79859 |
6.17 |
| 2026-04-07 12:00 |
16:17:37.15 |
-43:49:59.2 |
HIP 79859 |
5.64 |
| 2026-04-08 00:00 |
16:17:28.10 |
-43:52:34.1 |
HIP 79859 |
6.69 |
| 2026-04-08 12:00 |
16:17:18.74 |
-43:55:08.2 |
HIP 79859 |
8.79 |
| 2026-04-09 00:00 |
16:17:09.09 |
-43:57:41.6 |
HIP 79859 |
11.38 |
| 2026-04-09 12:00 |
16:16:59.14 |
-44:00:14.1 |
HIP 79859 |
14.20 |
| 2026-04-10 00:00 |
16:16:48.88 |
-44:02:45.8 |
HIP 79859 |
17.16 |
| 2026-04-10 12:00 |
16:16:38.33 |
-44:05:16.6 |
HIP 79859 |
20.20 |
| 2026-04-11 00:00 |
16:16:27.47 |
-44:07:46.6 |
HIP 79859 |
23.30 |
| 2026-04-11 12:00 |
16:16:16.32 |
-44:10:15.6 |
HIP 79859 |
26.45 |
| 2026-04-12 00:00 |
16:16:04.86 |
-44:12:43.8 |
HIP 79859 |
29.63 |
| 2026-04-12 12:00 |
16:15:53.10 |
-44:15:11.0 |
HIP 79487 |
30.37 |
| 2026-04-13 00:00 |
16:15:41.05 |
-44:17:37.2 |
HIP 79487 |
29.36 |
| 2026-04-13 12:00 |
16:15:28.69 |
-44:20:02.5 |
HIP 79487 |
28.64 |
| 2026-04-14 00:00 |
16:15:16.04 |
-44:22:26.7 |
HIP 79487 |
28.23 |
| 2026-04-14 12:00 |
16:15:03.09 |
-44:24:49.9 |
HIP 79487 |
28.16 |
| 2026-04-15 00:00 |
16:14:49.84 |
-44:27:12.1 |
HIP 79487 |
28.44 |
| 2026-04-15 12:00 |
16:14:36.29 |
-44:29:33.2 |
HIP 79487 |
29.06 |
| 2026-04-16 00:00 |
16:14:22.45 |
-44:31:53.3 |
HIP 79487 |
30.02 |