メタデータ
| 項目 |
値 |
| Designation |
P/2015 X3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-08-08T01:02:13.706880Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:43:53Z |
| Obs used |
35 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
10.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-11-30.0000000 |
| e |
0.43811818 |
| q (au) |
2.822784 |
| a (au) |
5.023804 |
| i (deg) |
24.376797 |
| Ω (om, deg) |
77.328495 |
| ω (w, deg) |
306.951390 |
| M (ma, deg) |
9.974595 |
等級
散乱 + 全体線形
$$
M_a = (11.148 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.148 |
| n |
6.000 |
| gf |
0.999 |
| 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) |
| 2026-09-20 00:00 |
02:35:46.92 |
-17:13:21.9 |
HIP 12023 |
10.96 |
| 2026-09-20 12:00 |
02:35:38.64 |
-17:14:58.0 |
HIP 12023 |
8.57 |
| 2026-09-21 00:00 |
02:35:30.00 |
-17:16:32.9 |
HIP 12023 |
6.22 |
| 2026-09-21 12:00 |
02:35:21.01 |
-17:18:06.6 |
HIP 12023 |
4.08 |
| 2026-09-22 00:00 |
02:35:11.65 |
-17:19:39.0 |
HIP 12023 |
2.89 |
| 2026-09-22 12:00 |
02:35:01.94 |
-17:21:10.0 |
HIP 12023 |
3.83 |
| 2026-09-23 00:00 |
02:34:51.87 |
-17:22:39.6 |
HIP 12023 |
6.05 |
| 2026-09-23 12:00 |
02:34:41.44 |
-17:24:07.8 |
HIP 12023 |
8.67 |
| 2026-09-24 00:00 |
02:34:30.67 |
-17:25:34.6 |
HIP 12023 |
11.46 |
| 2026-09-24 12:00 |
02:34:19.55 |
-17:26:59.7 |
HIP 12023 |
14.35 |
| 2026-09-25 00:00 |
02:34:08.08 |
-17:28:23.3 |
HIP 12023 |
17.34 |
| 2026-09-25 12:00 |
02:33:56.26 |
-17:29:45.3 |
HIP 12023 |
20.39 |
| 2026-09-26 00:00 |
02:33:44.11 |
-17:31:05.6 |
HIP 12023 |
23.52 |
| 2026-09-26 12:00 |
02:33:31.61 |
-17:32:24.1 |
HIP 12023 |
26.71 |
| 2026-09-27 00:00 |
02:33:18.78 |
-17:33:40.9 |
HIP 12023 |
29.97 |
| 2026-09-27 12:00 |
02:33:05.61 |
-17:34:55.8 |
HIP 11825 |
28.56 |
| 2026-09-28 00:00 |
02:32:52.11 |
-17:36:08.9 |
HIP 11825 |
26.74 |
| 2026-09-28 12:00 |
02:32:38.28 |
-17:37:20.0 |
HIP 11825 |
25.29 |
| 2026-09-29 00:00 |
02:32:24.12 |
-17:38:29.2 |
HIP 11825 |
24.30 |
| 2026-09-29 12:00 |
02:32:09.65 |
-17:39:36.3 |
HIP 11825 |
23.86 |
| 2026-09-30 00:00 |
02:31:54.85 |
-17:40:41.4 |
HIP 11825 |
24.03 |
| 2026-09-30 12:00 |
02:31:39.73 |
-17:41:44.4 |
HIP 11825 |
24.83 |
| 2026-10-01 00:00 |
02:31:24.30 |
-17:42:45.1 |
HIP 11825 |
26.22 |
| 2026-10-01 12:00 |
02:31:08.55 |
-17:43:43.7 |
HIP 11825 |
28.13 |
| 2026-10-02 00:00 |
02:30:52.51 |
-17:44:39.9 |
HIP 11825 |
30.51 |
| 2026-10-02 12:00 |
02:30:36.15 |
-17:45:33.9 |
HIP 11825 |
33.26 |
| 2026-10-03 00:00 |
02:30:19.50 |
-17:46:25.4 |
HIP 11825 |
36.33 |
| 2026-10-03 12:00 |
02:30:02.55 |
-17:47:14.6 |
HIP 11825 |
39.65 |
| 2026-10-04 00:00 |
02:29:45.31 |
-17:48:01.2 |
HIP 11825 |
43.19 |
| 2026-10-04 12:00 |
02:29:27.78 |
-17:48:45.4 |
HIP 11640 |
43.47 |
| 2026-10-05 00:00 |
02:29:09.97 |
-17:49:26.9 |
HIP 11571 |
42.53 |
| 2026-10-05 12:00 |
02:28:51.87 |
-17:50:05.8 |
HIP 11571 |
42.03 |
| 2026-10-06 00:00 |
02:28:33.51 |
-17:50:42.0 |
HIP 11571 |
42.04 |
| 2026-10-06 12:00 |
02:28:14.87 |
-17:51:15.5 |
HIP 11571 |
42.56 |
| 2026-10-07 00:00 |
02:27:55.97 |
-17:51:46.2 |
HIP 11571 |
43.61 |
| 2026-10-07 12:00 |
02:27:36.81 |
-17:52:14.0 |
HIP 11398 |
43.90 |
| 2026-10-08 00:00 |
02:27:17.40 |
-17:52:39.0 |
HIP 11398 |
43.40 |
| 2026-10-08 12:00 |
02:26:57.74 |
-17:53:01.0 |
HIP 11219 |
40.25 |
| 2026-10-09 00:00 |
02:26:37.83 |
-17:53:20.0 |
HIP 11219 |
35.85 |
| 2026-10-09 12:00 |
02:26:17.69 |
-17:53:36.0 |
HIP 11219 |
31.53 |
| 2026-10-10 00:00 |
02:25:57.31 |
-17:53:48.9 |
HIP 11219 |
27.36 |
| 2026-10-10 12:00 |
02:25:36.71 |
-17:53:58.6 |
HIP 11219 |
23.44 |
| 2026-10-11 00:00 |
02:25:15.89 |
-17:54:05.2 |
HIP 11219 |
19.97 |