メタデータ
| 項目 |
値 |
| Designation |
347P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-09-11T07:07:18.474240Z |
| Orbit solution date (soln_date, UTC) |
2025-11-13T12:12:47Z |
| Obs used |
309 |
| NEO |
- |
| M1 |
17.400 |
| 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) |
2019-06-17.0000000 |
| e |
0.38472732 |
| q (au) |
2.220496 |
| a (au) |
3.608962 |
| i (deg) |
11.747463 |
| Ω (om, deg) |
261.053847 |
| ω (w, deg) |
98.301249 |
| M (ma, deg) |
145.008703 |
等級
散乱 + 全体線形
$$
M_a = (13.237 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.237 |
| 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
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 |
09:56:34.35 |
-00:40:05.0 |
HIP 48756 |
12.45 |
| 2026-05-12 12:00 |
09:56:40.11 |
-00:39:21.7 |
HIP 48756 |
11.68 |
| 2026-05-13 00:00 |
09:56:46.05 |
-00:38:39.6 |
HIP 48756 |
11.11 |
| 2026-05-13 12:00 |
09:56:52.17 |
-00:37:58.7 |
HIP 48756 |
10.79 |
| 2026-05-14 00:00 |
09:56:58.47 |
-00:37:18.9 |
HIP 48756 |
10.77 |
| 2026-05-14 12:00 |
09:57:04.95 |
-00:36:40.2 |
HIP 48756 |
11.06 |
| 2026-05-15 00:00 |
09:57:11.61 |
-00:36:02.7 |
HIP 48756 |
11.65 |
| 2026-05-15 12:00 |
09:57:18.44 |
-00:35:26.3 |
HIP 48756 |
12.52 |
| 2026-05-16 00:00 |
09:57:25.45 |
-00:34:51.1 |
HIP 48756 |
13.62 |
| 2026-05-16 12:00 |
09:57:32.64 |
-00:34:17.0 |
HIP 48756 |
14.92 |
| 2026-05-17 00:00 |
09:57:39.99 |
-00:33:44.1 |
HIP 48756 |
16.38 |
| 2026-05-17 12:00 |
09:57:47.53 |
-00:33:12.4 |
HIP 48756 |
17.97 |
| 2026-05-18 00:00 |
09:57:55.23 |
-00:32:41.8 |
HIP 48756 |
19.68 |
| 2026-05-18 12:00 |
09:58:03.11 |
-00:32:12.3 |
HIP 48756 |
21.48 |
| 2026-05-19 00:00 |
09:58:11.15 |
-00:31:44.1 |
HIP 48756 |
23.36 |
| 2026-05-19 12:00 |
09:58:19.37 |
-00:31:17.0 |
HIP 48756 |
25.32 |
| 2026-05-20 00:00 |
09:58:27.75 |
-00:30:51.0 |
HIP 48756 |
27.34 |
| 2026-05-20 12:00 |
09:58:36.31 |
-00:30:26.2 |
HIP 48756 |
29.42 |
| 2026-05-21 00:00 |
09:58:45.02 |
-00:30:02.5 |
HIP 48756 |
31.56 |
| 2026-05-21 12:00 |
09:58:53.91 |
-00:29:40.0 |
HIP 48756 |
33.75 |
| 2026-05-22 00:00 |
09:59:02.96 |
-00:29:18.7 |
HIP 48756 |
35.99 |
| 2026-05-22 12:00 |
09:59:12.17 |
-00:28:58.5 |
HIP 49037 |
38.14 |
| 2026-05-23 00:00 |
09:59:21.54 |
-00:28:39.4 |
HIP 49037 |
37.49 |
| 2026-05-23 12:00 |
09:59:31.07 |
-00:28:21.5 |
HIP 49037 |
36.95 |
| 2026-05-24 00:00 |
09:59:40.76 |
-00:28:04.8 |
HIP 49037 |
36.53 |
| 2026-05-24 12:00 |
09:59:50.61 |
-00:27:49.2 |
HIP 49037 |
36.25 |
| 2026-05-25 00:00 |
10:00:00.62 |
-00:27:34.7 |
HIP 49037 |
36.11 |
| 2026-05-25 12:00 |
10:00:10.79 |
-00:27:21.3 |
HIP 49037 |
36.12 |
| 2026-05-26 00:00 |
10:00:21.11 |
-00:27:09.1 |
HIP 49037 |
36.29 |
| 2026-05-26 12:00 |
10:00:31.58 |
-00:26:58.1 |
HIP 49037 |
36.63 |
| 2026-05-27 00:00 |
10:00:42.21 |
-00:26:48.1 |
HIP 49125 |
36.77 |
| 2026-05-27 12:00 |
10:00:52.99 |
-00:26:39.3 |
HIP 49125 |
36.03 |
| 2026-05-28 00:00 |
10:01:03.92 |
-00:26:31.7 |
HIP 49125 |
35.45 |
| 2026-05-28 12:00 |
10:01:15.00 |
-00:26:25.1 |
HIP 49125 |
35.04 |
| 2026-05-29 00:00 |
10:01:26.23 |
-00:26:19.7 |
HIP 49280 |
34.77 |
| 2026-05-29 12:00 |
10:01:37.61 |
-00:26:15.4 |
HIP 49280 |
32.15 |
| 2026-05-30 00:00 |
10:01:49.14 |
-00:26:12.2 |
HIP 49280 |
29.56 |
| 2026-05-30 12:00 |
10:02:00.81 |
-00:26:10.1 |
HIP 49280 |
27.01 |
| 2026-05-31 00:00 |
10:02:12.63 |
-00:26:09.1 |
HIP 49280 |
24.51 |
| 2026-05-31 12:00 |
10:02:24.59 |
-00:26:09.3 |
HIP 49280 |
22.12 |
| 2026-06-01 00:00 |
10:02:36.69 |
-00:26:10.5 |
HIP 49280 |
19.87 |
| 2026-06-01 12:00 |
10:02:48.94 |
-00:26:12.9 |
HIP 49280 |
17.85 |
| 2026-06-02 00:00 |
10:03:01.33 |
-00:26:16.4 |
HIP 49280 |
16.15 |