メタデータ
| 項目 |
値 |
| Designation |
P/2010 T2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-07-09T19:48:58.587840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:46Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
17.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2010-11-12.0000000 |
| e |
0.32322085 |
| q (au) |
3.753596 |
| a (au) |
5.546265 |
| i (deg) |
8.010784 |
| Ω (om, deg) |
59.649297 |
| ω (w, deg) |
355.941770 |
| M (ma, deg) |
341.903321 |
等級
散乱 + 全体線形
$$
M_a = (7.674 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.674 |
| n |
6.000 |
| gf |
0.999 |
| 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) |
| 2026-07-29 00:00 |
10:10:03.96 |
+18:29:09.8 |
HIP 49729 |
13.44 |
| 2026-07-29 12:00 |
10:10:28.21 |
+18:26:46.6 |
HIP 49869 |
10.20 |
| 2026-07-30 00:00 |
10:10:52.47 |
+18:24:23.2 |
HIP 49869 |
9.70 |
| 2026-07-30 12:00 |
10:11:16.75 |
+18:21:59.8 |
HIP 49928 |
5.68 |
| 2026-07-31 00:00 |
10:11:41.06 |
+18:19:36.3 |
HIP 49928 |
1.07 |
| 2026-07-31 12:00 |
10:12:05.38 |
+18:17:12.7 |
HIP 49928 |
6.94 |
| 2026-08-01 00:00 |
10:12:29.72 |
+18:14:49.1 |
HIP 49928 |
13.16 |
| 2026-08-01 12:00 |
10:12:54.08 |
+18:12:25.4 |
HIP 49928 |
19.42 |
| 2026-08-02 00:00 |
10:13:18.46 |
+18:10:01.6 |
HIP 49928 |
25.68 |
| 2026-08-02 12:00 |
10:13:42.85 |
+18:07:37.7 |
HIP 49928 |
31.95 |
| 2026-08-03 00:00 |
10:14:07.27 |
+18:05:13.8 |
HIP 50305 |
37.03 |
| 2026-08-03 12:00 |
10:14:31.69 |
+18:02:49.8 |
HIP 50305 |
30.91 |
| 2026-08-04 00:00 |
10:14:56.14 |
+18:00:25.8 |
HIP 50305 |
24.86 |
| 2026-08-04 12:00 |
10:15:20.60 |
+17:58:01.7 |
HIP 50305 |
18.96 |
| 2026-08-05 00:00 |
10:15:45.07 |
+17:55:37.6 |
HIP 50305 |
13.41 |
| 2026-08-05 12:00 |
10:16:09.56 |
+17:53:13.4 |
HIP 50305 |
8.94 |
| 2026-08-06 00:00 |
10:16:34.06 |
+17:50:49.2 |
HIP 50305 |
7.70 |
| 2026-08-06 12:00 |
10:16:58.57 |
+17:48:24.9 |
HIP 50305 |
10.88 |
| 2026-08-07 00:00 |
10:17:23.10 |
+17:46:00.6 |
HIP 50305 |
16.04 |
| 2026-08-07 12:00 |
10:17:47.64 |
+17:43:36.3 |
HIP 50508 |
16.68 |
| 2026-08-08 00:00 |
10:18:12.19 |
+17:41:11.9 |
HIP 50508 |
10.85 |
| 2026-08-08 12:00 |
10:18:36.75 |
+17:38:47.5 |
HIP 50508 |
6.09 |
| 2026-08-09 00:00 |
10:19:01.32 |
+17:36:23.0 |
HIP 50508 |
6.04 |
| 2026-08-09 12:00 |
10:19:25.91 |
+17:33:58.6 |
HIP 50508 |
10.77 |
| 2026-08-10 00:00 |
10:19:50.50 |
+17:31:34.1 |
HIP 50508 |
16.61 |
| 2026-08-10 12:00 |
10:20:15.10 |
+17:29:09.6 |
HIP 50508 |
22.72 |
| 2026-08-11 00:00 |
10:20:39.71 |
+17:26:45.1 |
HIP 50814 |
26.29 |
| 2026-08-11 12:00 |
10:21:04.32 |
+17:24:20.6 |
HIP 50814 |
21.13 |
| 2026-08-12 00:00 |
10:21:28.94 |
+17:21:56.1 |
HIP 50814 |
16.79 |
| 2026-08-12 12:00 |
10:21:53.57 |
+17:19:31.6 |
HIP 50793 |
13.44 |
| 2026-08-13 00:00 |
10:22:18.21 |
+17:17:07.1 |
HIP 50793 |
9.95 |
| 2026-08-13 12:00 |
10:22:42.85 |
+17:14:42.6 |
HIP 50793 |
9.91 |
| 2026-08-14 00:00 |
10:23:07.49 |
+17:12:18.2 |
HIP 50793 |
13.35 |
| 2026-08-14 12:00 |
10:23:32.14 |
+17:09:53.7 |
HIP 50793 |
18.42 |
| 2026-08-15 00:00 |
10:23:56.79 |
+17:07:29.3 |
HIP 50826 |
21.45 |
| 2026-08-15 12:00 |
10:24:21.44 |
+17:05:04.9 |
HIP 51020 |
17.79 |
| 2026-08-16 00:00 |
10:24:46.09 |
+17:02:40.5 |
HIP 51020 |
11.62 |
| 2026-08-16 12:00 |
10:25:10.74 |
+17:00:16.2 |
HIP 51020 |
5.89 |
| 2026-08-17 00:00 |
10:25:35.40 |
+16:57:51.9 |
HIP 51020 |
3.91 |
| 2026-08-17 12:00 |
10:26:00.05 |
+16:55:27.7 |
HIP 51020 |
8.78 |
| 2026-08-18 00:00 |
10:26:24.71 |
+16:53:03.5 |
HIP 51020 |
14.83 |
| 2026-08-18 12:00 |
10:26:49.36 |
+16:50:39.3 |
HIP 51020 |
21.08 |
| 2026-08-19 00:00 |
10:27:14.01 |
+16:48:15.2 |
HIP 51145 |
25.42 |