メタデータ
| 項目 |
値 |
| Designation |
348P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-06-23T02:38:18.427200Z |
| Orbit solution date (soln_date, UTC) |
2022-03-08T19:44:06Z |
| Obs used |
84 |
| NEO |
- |
| M1 |
17.600 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-03-29.0000000 |
| e |
0.30165714 |
| q (au) |
2.213010 |
| a (au) |
3.168945 |
| i (deg) |
17.566297 |
| Ω (om, deg) |
313.555846 |
| ω (w, deg) |
134.165093 |
| M (ma, deg) |
112.497751 |
等級
散乱 + 全体線形
$$
M_a = (14.635 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.635 |
| n |
6.000 |
| gf |
0.962 |
| gb |
-0.862 |
| k |
0.980 |
| δ90 |
1.000 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
22:51:10.31 |
-02:49:03.0 |
HIP 112742 |
18.52 |
| 2026-05-12 12:00 |
22:51:34.48 |
-02:44:46.7 |
HIP 112967 |
17.89 |
| 2026-05-13 00:00 |
22:51:58.52 |
-02:40:30.5 |
HIP 112967 |
10.78 |
| 2026-05-13 12:00 |
22:52:22.43 |
-02:36:14.6 |
HIP 112967 |
4.59 |
| 2026-05-14 00:00 |
22:52:46.21 |
-02:31:58.8 |
HIP 112967 |
5.78 |
| 2026-05-14 12:00 |
22:53:09.86 |
-02:27:43.2 |
HIP 113037 |
10.98 |
| 2026-05-15 00:00 |
22:53:33.37 |
-02:23:27.7 |
HIP 113037 |
5.13 |
| 2026-05-15 12:00 |
22:53:56.74 |
-02:19:12.5 |
HIP 113037 |
6.07 |
| 2026-05-16 00:00 |
22:54:19.98 |
-02:14:57.4 |
HIP 113037 |
12.29 |
| 2026-05-16 12:00 |
22:54:43.09 |
-02:10:42.6 |
HIP 113037 |
19.17 |
| 2026-05-17 00:00 |
22:55:06.05 |
-02:06:28.0 |
HIP 113037 |
26.17 |
| 2026-05-17 12:00 |
22:55:28.87 |
-02:02:13.6 |
HIP 113037 |
33.20 |
| 2026-05-18 00:00 |
22:55:51.55 |
-01:57:59.4 |
HIP 113068 |
37.69 |
| 2026-05-18 12:00 |
22:56:14.09 |
-01:53:45.4 |
HIP 113068 |
39.64 |
| 2026-05-19 00:00 |
22:56:36.49 |
-01:49:31.7 |
HIP 113433 |
36.57 |
| 2026-05-19 12:00 |
22:56:58.74 |
-01:45:18.2 |
HIP 113433 |
29.63 |
| 2026-05-20 00:00 |
22:57:20.85 |
-01:41:05.0 |
HIP 113433 |
22.74 |
| 2026-05-20 12:00 |
22:57:42.81 |
-01:36:52.0 |
HIP 113433 |
15.94 |
| 2026-05-21 00:00 |
22:58:04.62 |
-01:32:39.2 |
HIP 113433 |
9.34 |
| 2026-05-21 12:00 |
22:58:26.29 |
-01:28:26.7 |
HIP 113433 |
3.89 |
| 2026-05-22 00:00 |
22:58:47.80 |
-01:24:14.5 |
HIP 113433 |
6.06 |
| 2026-05-22 12:00 |
22:59:09.17 |
-01:20:02.6 |
HIP 113496 |
9.11 |
| 2026-05-23 00:00 |
22:59:30.38 |
-01:15:50.9 |
HIP 113496 |
7.36 |
| 2026-05-23 12:00 |
22:59:51.44 |
-01:11:39.5 |
HIP 113496 |
10.77 |
| 2026-05-24 00:00 |
23:00:12.35 |
-01:07:28.3 |
HIP 113496 |
16.34 |
| 2026-05-24 12:00 |
23:00:33.10 |
-01:03:17.5 |
HIP 113496 |
22.50 |
| 2026-05-25 00:00 |
23:00:53.70 |
-00:59:06.9 |
HIP 113736 |
21.83 |
| 2026-05-25 12:00 |
23:01:14.14 |
-00:54:56.7 |
HIP 113736 |
21.37 |
| 2026-05-26 00:00 |
23:01:34.42 |
-00:50:46.7 |
HIP 113773 |
19.81 |
| 2026-05-26 12:00 |
23:01:54.55 |
-00:46:37.1 |
HIP 113773 |
13.40 |
| 2026-05-27 00:00 |
23:02:14.51 |
-00:42:27.7 |
HIP 113773 |
7.25 |
| 2026-05-27 12:00 |
23:02:34.32 |
-00:38:18.7 |
HIP 113773 |
3.11 |
| 2026-05-28 00:00 |
23:02:53.96 |
-00:34:10.0 |
HIP 113773 |
7.05 |
| 2026-05-28 12:00 |
23:03:13.44 |
-00:30:01.6 |
HIP 113834 |
4.47 |
| 2026-05-29 00:00 |
23:03:32.75 |
-00:25:53.5 |
HIP 113834 |
6.12 |
| 2026-05-29 12:00 |
23:03:51.90 |
-00:21:45.8 |
HIP 113834 |
11.62 |
| 2026-05-30 00:00 |
23:04:10.88 |
-00:17:38.4 |
HIP 113834 |
17.63 |
| 2026-05-30 12:00 |
23:04:29.70 |
-00:13:31.4 |
HIP 113834 |
23.75 |
| 2026-05-31 00:00 |
23:04:48.34 |
-00:09:24.7 |
HIP 114098 |
26.17 |
| 2026-05-31 12:00 |
23:05:06.82 |
-00:05:18.4 |
HIP 114098 |
22.40 |
| 2026-06-01 00:00 |
23:05:25.12 |
-00:01:12.4 |
HIP 114098 |
19.90 |
| 2026-06-01 12:00 |
23:05:43.25 |
+00:02:53.2 |
HIP 114098 |
19.15 |
| 2026-06-02 00:00 |
23:06:01.20 |
+00:06:58.4 |
HIP 114098 |
20.31 |