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) |
| 2026-07-29 00:00 |
02:17:04.27 |
-14:43:23.9 |
HIP 10571 |
14.35 |
| 2026-07-29 12:00 |
02:17:30.68 |
-14:43:50.2 |
HIP 10571 |
20.75 |
| 2026-07-30 00:00 |
02:17:56.86 |
-14:44:18.2 |
HIP 10571 |
27.09 |
| 2026-07-30 12:00 |
02:18:22.81 |
-14:44:47.7 |
HIP 10900 |
28.58 |
| 2026-07-31 00:00 |
02:18:48.52 |
-14:45:18.8 |
HIP 10900 |
22.79 |
| 2026-07-31 12:00 |
02:19:13.99 |
-14:45:51.4 |
HIP 10900 |
17.39 |
| 2026-08-01 00:00 |
02:19:39.21 |
-14:46:25.7 |
HIP 10900 |
12.79 |
| 2026-08-01 12:00 |
02:20:04.20 |
-14:47:01.5 |
HIP 10900 |
10.03 |
| 2026-08-02 00:00 |
02:20:28.94 |
-14:47:38.8 |
HIP 10900 |
10.56 |
| 2026-08-02 12:00 |
02:20:53.43 |
-14:48:17.7 |
HIP 10900 |
13.93 |
| 2026-08-03 00:00 |
02:21:17.68 |
-14:48:58.2 |
HIP 11025 |
11.89 |
| 2026-08-03 12:00 |
02:21:41.67 |
-14:49:40.2 |
HIP 11025 |
7.10 |
| 2026-08-04 00:00 |
02:22:05.41 |
-14:50:23.7 |
HIP 11025 |
5.21 |
| 2026-08-04 12:00 |
02:22:28.89 |
-14:51:08.8 |
HIP 11088 |
4.97 |
| 2026-08-05 00:00 |
02:22:52.12 |
-14:51:55.4 |
HIP 11088 |
2.67 |
| 2026-08-05 12:00 |
02:23:15.08 |
-14:52:43.6 |
HIP 11088 |
7.26 |
| 2026-08-06 00:00 |
02:23:37.78 |
-14:53:33.2 |
HIP 11088 |
12.63 |
| 2026-08-06 12:00 |
02:24:00.22 |
-14:54:24.4 |
HIP 11088 |
18.05 |
| 2026-08-07 00:00 |
02:24:22.39 |
-14:55:17.1 |
HIP 11088 |
23.43 |
| 2026-08-07 12:00 |
02:24:44.28 |
-14:56:11.3 |
HIP 11088 |
28.76 |
| 2026-08-08 00:00 |
02:25:05.91 |
-14:57:06.9 |
HIP 11386 |
23.81 |
| 2026-08-08 12:00 |
02:25:27.26 |
-14:58:04.1 |
HIP 11386 |
18.63 |
| 2026-08-09 00:00 |
02:25:48.34 |
-14:59:02.7 |
HIP 11386 |
13.57 |
| 2026-08-09 12:00 |
02:26:09.13 |
-15:00:02.7 |
HIP 11386 |
8.72 |
| 2026-08-10 00:00 |
02:26:29.65 |
-15:01:04.3 |
HIP 11386 |
4.60 |
| 2026-08-10 12:00 |
02:26:49.88 |
-15:02:07.2 |
HIP 11386 |
4.18 |
| 2026-08-11 00:00 |
02:27:09.82 |
-15:03:11.6 |
HIP 11386 |
7.94 |
| 2026-08-11 12:00 |
02:27:29.48 |
-15:04:17.3 |
HIP 11386 |
12.49 |
| 2026-08-12 00:00 |
02:27:48.85 |
-15:05:24.5 |
HIP 11386 |
17.17 |
| 2026-08-12 12:00 |
02:28:07.92 |
-15:06:33.0 |
HIP 11546 |
14.85 |
| 2026-08-13 00:00 |
02:28:26.70 |
-15:07:42.9 |
HIP 11546 |
11.39 |
| 2026-08-13 12:00 |
02:28:45.18 |
-15:08:54.2 |
HIP 11546 |
9.08 |
| 2026-08-14 00:00 |
02:29:03.37 |
-15:10:06.7 |
HIP 11546 |
8.76 |
| 2026-08-14 12:00 |
02:29:21.25 |
-15:11:20.6 |
HIP 11546 |
10.53 |
| 2026-08-15 00:00 |
02:29:38.83 |
-15:12:35.7 |
HIP 11546 |
13.53 |
| 2026-08-15 12:00 |
02:29:56.11 |
-15:13:52.2 |
HIP 11546 |
17.09 |
| 2026-08-16 00:00 |
02:30:13.08 |
-15:15:09.8 |
HIP 11681 |
18.85 |
| 2026-08-16 12:00 |
02:30:29.75 |
-15:16:28.8 |
HIP 11759 |
17.55 |
| 2026-08-17 00:00 |
02:30:46.10 |
-15:17:48.9 |
HIP 11759 |
13.68 |
| 2026-08-17 12:00 |
02:31:02.14 |
-15:19:10.2 |
HIP 11759 |
10.13 |
| 2026-08-18 00:00 |
02:31:17.87 |
-15:20:32.7 |
HIP 11759 |
7.25 |
| 2026-08-18 12:00 |
02:31:33.29 |
-15:21:56.3 |
HIP 11759 |
5.98 |
| 2026-08-19 00:00 |
02:31:48.39 |
-15:23:21.1 |
HIP 11759 |
7.10 |