P/2015 X3 (PANSTARRS)
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 |
1.000 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
21:58:07.57 |
-30:57:57.1 |
HIP 108504 |
11.97 |
| 2026-02-03 12:00 |
21:58:57.07 |
-30:54:16.3 |
HIP 108504 |
10.68 |
| 2026-02-04 00:00 |
21:59:46.59 |
-30:50:35.0 |
HIP 108504 |
18.36 |
| 2026-02-04 12:00 |
22:00:36.12 |
-30:46:53.4 |
HIP 108818 |
27.40 |
| 2026-02-05 00:00 |
22:01:25.67 |
-30:43:11.3 |
HIP 108818 |
16.45 |
| 2026-02-05 12:00 |
22:02:15.24 |
-30:39:28.8 |
HIP 108818 |
6.65 |
| 2026-02-06 00:00 |
22:03:04.82 |
-30:35:45.9 |
HIP 108818 |
8.51 |
| 2026-02-06 12:00 |
22:03:54.41 |
-30:32:02.6 |
HIP 108818 |
18.87 |
| 2026-02-07 00:00 |
22:04:44.02 |
-30:28:18.9 |
HIP 109059 |
17.97 |
| 2026-02-07 12:00 |
22:05:33.65 |
-30:24:34.9 |
HIP 109059 |
17.89 |
| 2026-02-08 00:00 |
22:06:23.29 |
-30:20:50.4 |
HIP 109207 |
14.63 |
| 2026-02-08 12:00 |
22:07:12.94 |
-30:17:05.5 |
HIP 109207 |
9.19 |
| 2026-02-09 00:00 |
22:08:02.60 |
-30:13:20.3 |
HIP 109207 |
14.59 |
| 2026-02-09 12:00 |
22:08:52.28 |
-30:09:34.7 |
HIP 109401 |
12.81 |
| 2026-02-10 00:00 |
22:09:41.97 |
-30:05:48.8 |
HIP 109401 |
3.09 |
| 2026-02-10 12:00 |
22:10:31.66 |
-30:02:02.5 |
HIP 109401 |
10.70 |
| 2026-02-11 00:00 |
22:11:21.38 |
-29:58:15.8 |
HIP 109573 |
6.16 |
| 2026-02-11 12:00 |
22:12:11.10 |
-29:54:28.8 |
HIP 109573 |
5.86 |
| 2026-02-12 00:00 |
22:13:00.83 |
-29:50:41.4 |
HIP 109573 |
17.08 |
| 2026-02-12 12:00 |
22:13:50.57 |
-29:46:53.7 |
HIP 109684 |
17.44 |
| 2026-02-13 00:00 |
22:14:40.32 |
-29:43:05.6 |
HIP 109684 |
23.03 |
| 2026-02-13 12:00 |
22:15:30.07 |
-29:39:17.2 |
HIP 109975 |
13.45 |
| 2026-02-14 00:00 |
22:16:19.84 |
-29:35:28.5 |
HIP 109975 |
1.98 |
| 2026-02-14 12:00 |
22:17:09.61 |
-29:31:39.5 |
HIP 109975 |
9.50 |
| 2026-02-15 00:00 |
22:17:59.39 |
-29:27:50.2 |
HIP 110151 |
13.88 |
| 2026-02-15 12:00 |
22:18:49.17 |
-29:24:00.6 |
HIP 110151 |
6.02 |
| 2026-02-16 00:00 |
22:19:38.96 |
-29:20:10.6 |
HIP 110151 |
12.03 |
| 2026-02-16 12:00 |
22:20:28.76 |
-29:16:20.4 |
HIP 110151 |
22.77 |
| 2026-02-17 00:00 |
22:21:18.56 |
-29:12:29.9 |
HIP 110393 |
26.48 |
| 2026-02-17 12:00 |
22:22:08.37 |
-29:08:39.1 |
HIP 110393 |
23.27 |
| 2026-02-18 00:00 |
22:22:58.17 |
-29:04:48.0 |
HIP 110393 |
25.46 |
| 2026-02-18 12:00 |
22:23:47.98 |
-29:00:56.7 |
HIP 110586 |
21.20 |
| 2026-02-19 00:00 |
22:24:37.80 |
-28:57:05.1 |
HIP 110586 |
17.49 |
| 2026-02-19 12:00 |
22:25:27.61 |
-28:53:13.2 |
HIP 110743 |
14.89 |
| 2026-02-20 00:00 |
22:26:17.43 |
-28:49:21.1 |
HIP 110743 |
15.67 |
| 2026-02-20 12:00 |
22:27:07.24 |
-28:45:28.7 |
HIP 110944 |
20.82 |
| 2026-02-21 00:00 |
22:27:57.06 |
-28:41:36.1 |
HIP 110944 |
10.25 |
| 2026-02-21 12:00 |
22:28:46.87 |
-28:37:43.3 |
HIP 110944 |
6.73 |
| 2026-02-22 00:00 |
22:29:36.69 |
-28:33:50.3 |
HIP 111015 |
6.21 |
| 2026-02-22 12:00 |
22:30:26.50 |
-28:29:57.0 |
HIP 111015 |
16.43 |
| 2026-02-23 00:00 |
22:31:16.31 |
-28:26:03.5 |
HIP 111218 |
20.34 |
| 2026-02-23 12:00 |
22:32:06.12 |
-28:22:09.8 |
HIP 111218 |
14.36 |
| 2026-02-24 00:00 |
22:32:55.93 |
-28:18:15.9 |
HIP 111341 |
11.41 |