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) |
| 2026-09-20 00:00 |
08:01:46.01 |
+22:48:49.0 |
HIP 39223 |
27.85 |
| 2026-09-20 12:00 |
08:02:15.27 |
+22:47:42.1 |
HIP 39223 |
28.90 |
| 2026-09-21 00:00 |
08:02:44.41 |
+22:46:35.4 |
HIP 39223 |
31.43 |
| 2026-09-21 12:00 |
08:03:13.44 |
+22:45:28.8 |
HIP 39223 |
35.10 |
| 2026-09-22 00:00 |
08:03:42.34 |
+22:44:22.3 |
HIP 39659 |
36.53 |
| 2026-09-22 12:00 |
08:04:11.13 |
+22:43:16.0 |
HIP 39659 |
29.80 |
| 2026-09-23 00:00 |
08:04:39.80 |
+22:42:09.8 |
HIP 39659 |
23.10 |
| 2026-09-23 12:00 |
08:05:08.35 |
+22:41:03.7 |
HIP 39659 |
16.42 |
| 2026-09-24 00:00 |
08:05:36.78 |
+22:39:57.8 |
HIP 39659 |
9.78 |
| 2026-09-24 12:00 |
08:06:05.09 |
+22:38:52.0 |
HIP 39659 |
3.16 |
| 2026-09-25 00:00 |
08:06:33.27 |
+22:37:46.4 |
HIP 39659 |
3.45 |
| 2026-09-25 12:00 |
08:07:01.33 |
+22:36:40.9 |
HIP 39705 |
9.91 |
| 2026-09-26 00:00 |
08:07:29.27 |
+22:35:35.7 |
HIP 39788 |
12.40 |
| 2026-09-26 12:00 |
08:07:57.08 |
+22:34:30.6 |
HIP 39788 |
12.54 |
| 2026-09-27 00:00 |
08:08:24.76 |
+22:33:25.7 |
HIP 39788 |
15.64 |
| 2026-09-27 12:00 |
08:08:52.31 |
+22:32:21.0 |
HIP 39788 |
20.37 |
| 2026-09-28 00:00 |
08:09:19.74 |
+22:31:16.5 |
HIP 39788 |
25.83 |
| 2026-09-28 12:00 |
08:09:47.04 |
+22:30:12.3 |
HIP 39788 |
31.63 |
| 2026-09-29 00:00 |
08:10:14.20 |
+22:29:08.2 |
HIP 39950 |
36.24 |
| 2026-09-29 12:00 |
08:10:41.23 |
+22:28:04.4 |
HIP 40216 |
30.05 |
| 2026-09-30 00:00 |
08:11:08.13 |
+22:27:00.8 |
HIP 40216 |
23.75 |
| 2026-09-30 12:00 |
08:11:34.90 |
+22:25:57.5 |
HIP 40216 |
17.47 |
| 2026-10-01 00:00 |
08:12:01.53 |
+22:24:54.4 |
HIP 40216 |
11.23 |
| 2026-10-01 12:00 |
08:12:28.02 |
+22:23:51.6 |
HIP 40216 |
5.02 |
| 2026-10-02 00:00 |
08:12:54.38 |
+22:22:49.0 |
HIP 40216 |
1.19 |
| 2026-10-02 12:00 |
08:13:20.60 |
+22:21:46.8 |
HIP 40216 |
7.32 |
| 2026-10-03 00:00 |
08:13:46.67 |
+22:20:44.8 |
HIP 40306 |
4.07 |
| 2026-10-03 12:00 |
08:14:12.61 |
+22:19:43.1 |
HIP 40306 |
5.87 |
| 2026-10-04 00:00 |
08:14:38.40 |
+22:18:41.7 |
HIP 40306 |
11.22 |
| 2026-10-04 12:00 |
08:15:04.04 |
+22:17:40.6 |
HIP 40306 |
17.01 |
| 2026-10-05 00:00 |
08:15:29.54 |
+22:16:39.9 |
HIP 40306 |
22.89 |
| 2026-10-05 12:00 |
08:15:54.89 |
+22:15:39.5 |
HIP 40565 |
24.97 |
| 2026-10-06 00:00 |
08:16:20.10 |
+22:14:39.4 |
HIP 40565 |
21.23 |
| 2026-10-06 12:00 |
08:16:45.15 |
+22:13:39.7 |
HIP 40565 |
18.66 |
| 2026-10-07 00:00 |
08:17:10.05 |
+22:12:40.3 |
HIP 40696 |
17.63 |
| 2026-10-07 12:00 |
08:17:34.80 |
+22:11:41.4 |
HIP 40696 |
12.00 |
| 2026-10-08 00:00 |
08:17:59.39 |
+22:10:42.8 |
HIP 40696 |
6.70 |
| 2026-10-08 12:00 |
08:18:23.83 |
+22:09:44.5 |
HIP 40696 |
3.53 |
| 2026-10-09 00:00 |
08:18:48.11 |
+22:08:46.7 |
HIP 40696 |
6.75 |
| 2026-10-09 12:00 |
08:19:12.23 |
+22:07:49.3 |
HIP 40696 |
11.95 |
| 2026-10-10 00:00 |
08:19:36.19 |
+22:06:52.3 |
HIP 40696 |
17.41 |
| 2026-10-10 12:00 |
08:20:00.00 |
+22:05:55.8 |
HIP 40920 |
15.57 |
| 2026-10-11 00:00 |
08:20:23.63 |
+22:04:59.6 |
HIP 40920 |
10.05 |