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 |
0.994 |
| 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) |
| 2026-03-26 00:00 |
10:31:35.07 |
+15:35:09.0 |
HIP 51479 |
21.59 |
| 2026-03-26 12:00 |
10:31:19.00 |
+15:36:22.5 |
HIP 51479 |
18.96 |
| 2026-03-27 00:00 |
10:31:03.28 |
+15:37:33.3 |
HIP 51479 |
16.97 |
| 2026-03-27 12:00 |
10:30:47.89 |
+15:38:41.3 |
HIP 51479 |
15.77 |
| 2026-03-28 00:00 |
10:30:32.84 |
+15:39:46.7 |
HIP 51479 |
15.49 |
| 2026-03-28 12:00 |
10:30:18.14 |
+15:40:49.3 |
HIP 51479 |
16.11 |
| 2026-03-29 00:00 |
10:30:03.79 |
+15:41:49.3 |
HIP 51479 |
17.48 |
| 2026-03-29 12:00 |
10:29:49.79 |
+15:42:46.5 |
HIP 51479 |
19.38 |
| 2026-03-30 00:00 |
10:29:36.14 |
+15:43:41.1 |
HIP 51279 |
16.85 |
| 2026-03-30 12:00 |
10:29:22.84 |
+15:44:33.0 |
HIP 51279 |
13.60 |
| 2026-03-31 00:00 |
10:29:09.90 |
+15:45:22.2 |
HIP 51279 |
10.46 |
| 2026-03-31 12:00 |
10:28:57.32 |
+15:46:08.8 |
HIP 51279 |
7.47 |
| 2026-04-01 00:00 |
10:28:45.10 |
+15:46:52.6 |
HIP 51279 |
4.74 |
| 2026-04-01 12:00 |
10:28:33.24 |
+15:47:33.8 |
HIP 51279 |
2.75 |
| 2026-04-02 00:00 |
10:28:21.74 |
+15:48:12.4 |
HIP 51279 |
3.07 |
| 2026-04-02 12:00 |
10:28:10.60 |
+15:48:48.3 |
HIP 51279 |
5.14 |
| 2026-04-03 00:00 |
10:27:59.84 |
+15:49:21.6 |
HIP 51279 |
7.55 |
| 2026-04-03 12:00 |
10:27:49.44 |
+15:49:52.3 |
HIP 51201 |
5.97 |
| 2026-04-04 00:00 |
10:27:39.40 |
+15:50:20.3 |
HIP 51201 |
4.56 |
| 2026-04-04 12:00 |
10:27:29.74 |
+15:50:45.8 |
HIP 51201 |
4.19 |
| 2026-04-05 00:00 |
10:27:20.44 |
+15:51:08.6 |
HIP 51201 |
4.98 |
| 2026-04-05 12:00 |
10:27:11.52 |
+15:51:28.9 |
HIP 51201 |
6.42 |
| 2026-04-06 00:00 |
10:27:02.97 |
+15:51:46.5 |
HIP 51201 |
8.09 |
| 2026-04-06 12:00 |
10:26:54.79 |
+15:52:01.6 |
HIP 51201 |
9.81 |
| 2026-04-07 00:00 |
10:26:46.99 |
+15:52:14.2 |
HIP 51201 |
11.52 |
| 2026-04-07 12:00 |
10:26:39.55 |
+15:52:24.2 |
HIP 51201 |
13.18 |
| 2026-04-08 00:00 |
10:26:32.50 |
+15:52:31.6 |
HIP 51201 |
14.77 |
| 2026-04-08 12:00 |
10:26:25.81 |
+15:52:36.5 |
HIP 51201 |
16.29 |
| 2026-04-09 00:00 |
10:26:19.51 |
+15:52:38.9 |
HIP 51201 |
17.72 |
| 2026-04-09 12:00 |
10:26:13.58 |
+15:52:38.8 |
HIP 51201 |
19.07 |
| 2026-04-10 00:00 |
10:26:08.02 |
+15:52:36.2 |
HIP 51201 |
20.33 |
| 2026-04-10 12:00 |
10:26:02.84 |
+15:52:31.1 |
HIP 51201 |
21.49 |
| 2026-04-11 00:00 |
10:25:58.03 |
+15:52:23.6 |
HIP 51201 |
22.58 |
| 2026-04-11 12:00 |
10:25:53.60 |
+15:52:13.6 |
HIP 51201 |
23.57 |
| 2026-04-12 00:00 |
10:25:49.55 |
+15:52:01.1 |
HIP 51201 |
24.47 |
| 2026-04-12 12:00 |
10:25:45.87 |
+15:51:46.2 |
HIP 51201 |
25.28 |
| 2026-04-13 00:00 |
10:25:42.57 |
+15:51:28.9 |
HIP 51201 |
26.00 |
| 2026-04-13 12:00 |
10:25:39.64 |
+15:51:09.1 |
HIP 51201 |
26.63 |
| 2026-04-14 00:00 |
10:25:37.09 |
+15:50:47.0 |
HIP 51201 |
27.18 |
| 2026-04-14 12:00 |
10:25:34.91 |
+15:50:22.4 |
HIP 51201 |
27.64 |
| 2026-04-15 00:00 |
10:25:33.11 |
+15:49:55.5 |
HIP 51201 |
28.01 |
| 2026-04-15 12:00 |
10:25:31.68 |
+15:49:26.2 |
HIP 51201 |
28.30 |
| 2026-04-16 00:00 |
10:25:30.62 |
+15:48:54.6 |
HIP 51201 |
28.51 |