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) |
| 2026-07-29 00:00 |
07:02:13.13 |
+24:36:17.8 |
HIP 33782 |
19.71 |
| 2026-07-29 12:00 |
07:02:49.71 |
+24:35:31.9 |
HIP 33927 |
23.31 |
| 2026-07-30 00:00 |
07:03:26.26 |
+24:34:45.6 |
HIP 34073 |
22.28 |
| 2026-07-30 12:00 |
07:04:02.79 |
+24:33:58.9 |
HIP 34073 |
20.13 |
| 2026-07-31 00:00 |
07:04:39.28 |
+24:33:11.8 |
HIP 34073 |
21.28 |
| 2026-07-31 12:00 |
07:05:15.74 |
+24:32:24.3 |
HIP 34266 |
23.02 |
| 2026-08-01 00:00 |
07:05:52.16 |
+24:31:36.4 |
HIP 34266 |
20.49 |
| 2026-08-01 12:00 |
07:06:28.56 |
+24:30:48.0 |
HIP 34266 |
21.16 |
| 2026-08-02 00:00 |
07:07:04.92 |
+24:29:59.3 |
HIP 34351 |
20.07 |
| 2026-08-02 12:00 |
07:07:41.25 |
+24:29:10.2 |
HIP 34351 |
19.85 |
| 2026-08-03 00:00 |
07:08:17.54 |
+24:28:20.7 |
HIP 34351 |
22.87 |
| 2026-08-03 12:00 |
07:08:53.80 |
+24:27:30.8 |
HIP 34630 |
21.59 |
| 2026-08-04 00:00 |
07:09:30.02 |
+24:26:40.5 |
HIP 34630 |
13.62 |
| 2026-08-04 12:00 |
07:10:06.21 |
+24:25:49.8 |
HIP 34630 |
6.50 |
| 2026-08-05 00:00 |
07:10:42.36 |
+24:24:58.8 |
HIP 34630 |
6.01 |
| 2026-08-05 12:00 |
07:11:18.47 |
+24:24:07.3 |
HIP 34630 |
12.91 |
| 2026-08-06 00:00 |
07:11:54.55 |
+24:23:15.5 |
HIP 34819 |
17.15 |
| 2026-08-06 12:00 |
07:12:30.58 |
+24:22:23.3 |
HIP 34819 |
14.70 |
| 2026-08-07 00:00 |
07:13:06.57 |
+24:21:30.8 |
HIP 34819 |
16.56 |
| 2026-08-07 12:00 |
07:13:42.53 |
+24:20:37.9 |
HIP 34819 |
21.63 |
| 2026-08-08 00:00 |
07:14:18.44 |
+24:19:44.6 |
HIP 34995 |
23.00 |
| 2026-08-08 12:00 |
07:14:54.31 |
+24:18:50.9 |
HIP 34995 |
24.64 |
| 2026-08-09 00:00 |
07:15:30.14 |
+24:17:56.9 |
HIP 35224 |
22.82 |
| 2026-08-09 12:00 |
07:16:05.92 |
+24:17:02.6 |
HIP 35224 |
17.98 |
| 2026-08-10 00:00 |
07:16:41.66 |
+24:16:07.9 |
HIP 35224 |
16.12 |
| 2026-08-10 12:00 |
07:17:17.36 |
+24:15:12.9 |
HIP 35344 |
14.99 |
| 2026-08-11 00:00 |
07:17:53.00 |
+24:14:17.5 |
HIP 35344 |
9.96 |
| 2026-08-11 12:00 |
07:18:28.60 |
+24:13:21.8 |
HIP 35429 |
8.15 |
| 2026-08-12 00:00 |
07:19:04.16 |
+24:12:25.7 |
HIP 35429 |
6.06 |
| 2026-08-12 12:00 |
07:19:39.66 |
+24:11:29.3 |
HIP 35429 |
11.83 |
| 2026-08-13 00:00 |
07:20:15.11 |
+24:10:32.6 |
HIP 35429 |
19.38 |
| 2026-08-13 12:00 |
07:20:50.51 |
+24:09:35.6 |
HIP 35774 |
26.81 |
| 2026-08-14 00:00 |
07:21:25.86 |
+24:08:38.3 |
HIP 35774 |
18.73 |
| 2026-08-14 12:00 |
07:22:01.16 |
+24:07:40.7 |
HIP 35774 |
10.75 |
| 2026-08-15 00:00 |
07:22:36.41 |
+24:06:42.7 |
HIP 35774 |
3.40 |
| 2026-08-15 12:00 |
07:23:11.60 |
+24:05:44.5 |
HIP 35774 |
6.22 |
| 2026-08-16 00:00 |
07:23:46.73 |
+24:04:45.9 |
HIP 35774 |
14.02 |
| 2026-08-16 12:00 |
07:24:21.81 |
+24:03:47.1 |
HIP 35774 |
22.01 |
| 2026-08-17 00:00 |
07:24:56.84 |
+24:02:47.9 |
HIP 36161 |
28.65 |
| 2026-08-17 12:00 |
07:25:31.80 |
+24:01:48.5 |
HIP 36161 |
20.69 |
| 2026-08-18 00:00 |
07:26:06.71 |
+24:00:48.8 |
HIP 36161 |
12.86 |
| 2026-08-18 12:00 |
07:26:41.56 |
+23:59:48.9 |
HIP 36161 |
5.65 |
| 2026-08-19 00:00 |
07:27:16.35 |
+23:58:48.6 |
HIP 36161 |
5.19 |