メタデータ
| 項目 |
値 |
| Designation |
419P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-03-15T12:20:00.761280Z |
| Orbit solution date (soln_date, UTC) |
2023-10-29T03:13:38Z |
| Obs used |
297 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
23.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-06-11.0000000 |
| e |
0.27849867 |
| q (au) |
2.542241 |
| a (au) |
3.523542 |
| i (deg) |
2.804422 |
| Ω (om, deg) |
40.425087 |
| ω (w, deg) |
187.263454 |
| M (ma, deg) |
121.968066 |
等級
散乱 + 全体線形
$$
M_a = (15.031 + 2.720\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.031 |
| n |
2.720 |
| gf |
1.000 |
| gb |
-0.904 |
| k |
0.999 |
| 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) |
| 2026-06-01 00:00 |
05:50:56.01 |
+25:12:12.3 |
HIP 27640 |
2.13 |
| 2026-06-01 12:00 |
05:51:31.72 |
+25:12:21.1 |
HIP 27640 |
6.74 |
| 2026-06-02 00:00 |
05:52:07.47 |
+25:12:29.4 |
HIP 27640 |
14.73 |
| 2026-06-02 12:00 |
05:52:43.26 |
+25:12:37.4 |
HIP 27847 |
13.45 |
| 2026-06-03 00:00 |
05:53:19.10 |
+25:12:44.9 |
HIP 27847 |
8.72 |
| 2026-06-03 12:00 |
05:53:54.98 |
+25:12:51.9 |
HIP 27847 |
10.13 |
| 2026-06-04 00:00 |
05:54:30.91 |
+25:12:58.5 |
HIP 27847 |
16.17 |
| 2026-06-04 12:00 |
05:55:06.88 |
+25:13:04.6 |
HIP 28084 |
16.36 |
| 2026-06-05 00:00 |
05:55:42.89 |
+25:13:10.3 |
HIP 28084 |
9.48 |
| 2026-06-05 12:00 |
05:56:18.94 |
+25:13:15.5 |
HIP 28084 |
6.68 |
| 2026-06-06 00:00 |
05:56:55.03 |
+25:13:20.3 |
HIP 28084 |
11.51 |
| 2026-06-06 12:00 |
05:57:31.16 |
+25:13:24.6 |
HIP 28220 |
4.59 |
| 2026-06-07 00:00 |
05:58:07.33 |
+25:13:28.4 |
HIP 28220 |
5.72 |
| 2026-06-07 12:00 |
05:58:43.54 |
+25:13:31.8 |
HIP 28332 |
9.75 |
| 2026-06-08 00:00 |
05:59:19.78 |
+25:13:34.8 |
HIP 28332 |
7.30 |
| 2026-06-08 12:00 |
05:59:56.07 |
+25:13:37.2 |
HIP 28332 |
12.09 |
| 2026-06-09 00:00 |
06:00:32.39 |
+25:13:39.2 |
HIP 28332 |
19.34 |
| 2026-06-09 12:00 |
06:01:08.74 |
+25:13:40.7 |
HIP 28548 |
16.70 |
| 2026-06-10 00:00 |
06:01:45.14 |
+25:13:41.8 |
HIP 28548 |
15.77 |
| 2026-06-10 12:00 |
06:02:21.56 |
+25:13:42.4 |
HIP 28548 |
18.81 |
| 2026-06-11 00:00 |
06:02:58.03 |
+25:13:42.5 |
HIP 28742 |
21.15 |
| 2026-06-11 12:00 |
06:03:34.52 |
+25:13:42.1 |
HIP 28773 |
13.21 |
| 2026-06-12 00:00 |
06:04:11.05 |
+25:13:41.3 |
HIP 28773 |
5.03 |
| 2026-06-12 12:00 |
06:04:47.61 |
+25:13:39.9 |
HIP 28791 |
3.17 |
| 2026-06-13 00:00 |
06:05:24.20 |
+25:13:38.1 |
HIP 28791 |
9.91 |
| 2026-06-13 12:00 |
06:06:00.82 |
+25:13:35.8 |
HIP 28791 |
17.99 |
| 2026-06-14 00:00 |
06:06:37.48 |
+25:13:33.1 |
HIP 29075 |
23.11 |
| 2026-06-14 12:00 |
06:07:14.16 |
+25:13:29.8 |
HIP 29075 |
17.24 |
| 2026-06-15 00:00 |
06:07:50.87 |
+25:13:26.1 |
HIP 29075 |
14.08 |
| 2026-06-15 12:00 |
06:08:27.60 |
+25:13:21.9 |
HIP 29075 |
15.40 |
| 2026-06-16 00:00 |
06:09:04.36 |
+25:13:17.2 |
HIP 29158 |
17.48 |
| 2026-06-16 12:00 |
06:09:41.15 |
+25:13:12.0 |
HIP 29158 |
19.63 |
| 2026-06-17 00:00 |
06:10:17.97 |
+25:13:06.4 |
HIP 29334 |
22.79 |
| 2026-06-17 12:00 |
06:10:54.80 |
+25:13:00.2 |
HIP 29334 |
20.19 |
| 2026-06-18 00:00 |
06:11:31.66 |
+25:12:53.6 |
HIP 29334 |
20.86 |
| 2026-06-18 12:00 |
06:12:08.55 |
+25:12:46.4 |
HIP 29454 |
18.90 |
| 2026-06-19 00:00 |
06:12:45.45 |
+25:12:38.8 |
HIP 29454 |
19.53 |
| 2026-06-19 12:00 |
06:13:22.38 |
+25:12:30.7 |
HIP 29454 |
23.34 |
| 2026-06-20 00:00 |
06:13:59.32 |
+25:12:22.1 |
HIP 29702 |
20.78 |
| 2026-06-20 12:00 |
06:14:36.28 |
+25:12:13.0 |
HIP 29702 |
13.45 |
| 2026-06-21 00:00 |
06:15:13.27 |
+25:12:03.5 |
HIP 29702 |
8.38 |
| 2026-06-21 12:00 |
06:15:50.27 |
+25:11:53.4 |
HIP 29702 |
9.97 |
| 2026-06-22 00:00 |
06:16:27.29 |
+25:11:42.9 |
HIP 29810 |
2.87 |