メタデータ
| 項目 |
値 |
| Designation |
P/2015 X6 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-03-18T15:23:43.068480Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:20Z |
| Obs used |
46 |
| NEO |
- |
| M1 |
16.100 |
| 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) |
2015-12-22.0000000 |
| e |
0.16962315 |
| q (au) |
2.287338 |
| a (au) |
2.754579 |
| i (deg) |
4.558135 |
| Ω (om, deg) |
107.111954 |
| ω (w, deg) |
329.021808 |
| M (ma, deg) |
341.105692 |
等級
散乱 + 全体線形
$$
M_a = (13.451 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.451 |
| 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
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 |
13:01:15.44 |
-02:47:02.7 |
HIP 63467 |
15.24 |
| 2026-09-20 12:00 |
13:01:57.53 |
-02:51:33.0 |
HIP 63661 |
17.47 |
| 2026-09-21 00:00 |
13:02:39.63 |
-02:56:03.0 |
HIP 63703 |
9.53 |
| 2026-09-21 12:00 |
13:03:21.76 |
-03:00:32.8 |
HIP 63703 |
2.94 |
| 2026-09-22 00:00 |
13:04:03.91 |
-03:05:02.4 |
HIP 63746 |
8.47 |
| 2026-09-22 12:00 |
13:04:46.08 |
-03:09:31.7 |
HIP 63746 |
13.70 |
| 2026-09-23 00:00 |
13:05:28.27 |
-03:14:00.7 |
HIP 63746 |
23.78 |
| 2026-09-23 12:00 |
13:06:10.48 |
-03:18:29.5 |
HIP 63746 |
34.73 |
| 2026-09-24 00:00 |
13:06:52.71 |
-03:22:58.0 |
HIP 64221 |
42.44 |
| 2026-09-24 12:00 |
13:07:34.96 |
-03:27:26.2 |
HIP 64221 |
32.15 |
| 2026-09-25 00:00 |
13:08:17.23 |
-03:31:54.2 |
HIP 64221 |
22.99 |
| 2026-09-25 12:00 |
13:08:59.52 |
-03:36:21.9 |
HIP 64221 |
16.89 |
| 2026-09-26 00:00 |
13:09:41.83 |
-03:40:49.3 |
HIP 64221 |
17.46 |
| 2026-09-26 12:00 |
13:10:24.16 |
-03:45:16.4 |
HIP 64221 |
24.23 |
| 2026-09-27 00:00 |
13:11:06.51 |
-03:49:43.2 |
HIP 64467 |
25.82 |
| 2026-09-27 12:00 |
13:11:48.88 |
-03:54:09.7 |
HIP 64467 |
14.95 |
| 2026-09-28 00:00 |
13:12:31.26 |
-03:58:35.9 |
HIP 64467 |
6.58 |
| 2026-09-28 12:00 |
13:13:13.67 |
-04:03:01.9 |
HIP 64467 |
11.23 |
| 2026-09-29 00:00 |
13:13:56.09 |
-04:07:27.5 |
HIP 64535 |
15.66 |
| 2026-09-29 12:00 |
13:14:38.54 |
-04:11:52.8 |
HIP 64535 |
18.05 |
| 2026-09-30 00:00 |
13:15:21.00 |
-04:16:17.8 |
HIP 64731 |
24.30 |
| 2026-09-30 12:00 |
13:16:03.48 |
-04:20:42.4 |
HIP 64731 |
26.34 |
| 2026-10-01 00:00 |
13:16:45.98 |
-04:25:06.8 |
HIP 64811 |
18.77 |
| 2026-10-01 12:00 |
13:17:28.50 |
-04:29:30.8 |
HIP 64811 |
15.67 |
| 2026-10-02 00:00 |
13:18:11.03 |
-04:33:54.5 |
HIP 64811 |
20.06 |
| 2026-10-02 12:00 |
13:18:53.59 |
-04:38:17.8 |
HIP 64811 |
28.68 |
| 2026-10-03 00:00 |
13:19:36.16 |
-04:42:40.8 |
HIP 65243 |
38.80 |
| 2026-10-03 12:00 |
13:20:18.75 |
-04:47:03.5 |
HIP 65243 |
29.01 |
| 2026-10-04 00:00 |
13:21:01.36 |
-04:51:25.8 |
HIP 65243 |
21.00 |
| 2026-10-04 12:00 |
13:21:43.98 |
-04:55:47.8 |
HIP 65243 |
17.43 |
| 2026-10-05 00:00 |
13:22:26.62 |
-05:00:09.4 |
HIP 65323 |
13.84 |
| 2026-10-05 12:00 |
13:23:09.28 |
-05:04:30.6 |
HIP 65323 |
9.36 |
| 2026-10-06 00:00 |
13:23:51.95 |
-05:08:51.4 |
HIP 65379 |
1.10 |
| 2026-10-06 12:00 |
13:24:34.65 |
-05:13:11.9 |
HIP 65420 |
3.38 |
| 2026-10-07 00:00 |
13:25:17.35 |
-05:17:32.0 |
HIP 65420 |
13.43 |
| 2026-10-07 12:00 |
13:26:00.07 |
-05:21:51.7 |
HIP 65420 |
24.76 |
| 2026-10-08 00:00 |
13:26:42.81 |
-05:26:11.0 |
HIP 65653 |
23.57 |
| 2026-10-08 12:00 |
13:27:25.56 |
-05:30:30.0 |
HIP 65653 |
23.48 |
| 2026-10-09 00:00 |
13:28:08.33 |
-05:34:48.5 |
HIP 65772 |
26.28 |
| 2026-10-09 12:00 |
13:28:51.11 |
-05:39:06.6 |
HIP 65772 |
18.45 |
| 2026-10-10 00:00 |
13:29:33.90 |
-05:43:24.2 |
HIP 65772 |
15.93 |
| 2026-10-10 12:00 |
13:30:16.71 |
-05:47:41.5 |
HIP 65772 |
20.76 |
| 2026-10-11 00:00 |
13:30:59.53 |
-05:51:58.3 |
HIP 66000 |
15.84 |