メタデータ
| 項目 |
値 |
| Designation |
P/2015 K5 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2015-06-06T08:58:18.402240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:33:11Z |
| Obs used |
56 |
| NEO |
- |
| M1 |
13.700 |
| 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) |
2015-06-12.0000000 |
| e |
0.55395709 |
| q (au) |
2.986133 |
| a (au) |
6.694721 |
| i (deg) |
39.987279 |
| Ω (om, deg) |
134.269042 |
| ω (w, deg) |
105.994786 |
| M (ma, deg) |
0.320124 |
等級
散乱 + 全体線形
$$
M_a = (15.097 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.097 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-09-20 00:00 |
06:14:30.18 |
-07:51:42.3 |
HIP 29663 |
11.42 |
| 2026-09-20 12:00 |
06:14:33.81 |
-07:52:57.0 |
HIP 29663 |
12.03 |
| 2026-09-21 00:00 |
06:14:37.35 |
-07:54:11.8 |
HIP 29663 |
12.80 |
| 2026-09-21 12:00 |
06:14:40.79 |
-07:55:26.7 |
HIP 29663 |
13.72 |
| 2026-09-22 00:00 |
06:14:44.13 |
-07:56:41.8 |
HIP 29663 |
14.74 |
| 2026-09-22 12:00 |
06:14:47.38 |
-07:57:57.1 |
HIP 29663 |
15.84 |
| 2026-09-23 00:00 |
06:14:50.52 |
-07:59:12.5 |
HIP 29663 |
17.00 |
| 2026-09-23 12:00 |
06:14:53.57 |
-08:00:28.0 |
HIP 29663 |
18.22 |
| 2026-09-24 00:00 |
06:14:56.52 |
-08:01:43.7 |
HIP 29663 |
19.47 |
| 2026-09-24 12:00 |
06:14:59.37 |
-08:02:59.5 |
HIP 29663 |
20.75 |
| 2026-09-25 00:00 |
06:15:02.12 |
-08:04:15.4 |
HIP 29663 |
22.05 |
| 2026-09-25 12:00 |
06:15:04.78 |
-08:05:31.4 |
HIP 29663 |
23.36 |
| 2026-09-26 00:00 |
06:15:07.33 |
-08:06:47.5 |
HIP 29663 |
24.69 |
| 2026-09-26 12:00 |
06:15:09.78 |
-08:08:03.7 |
HIP 29663 |
26.02 |
| 2026-09-27 00:00 |
06:15:12.13 |
-08:09:20.0 |
HIP 29663 |
27.36 |
| 2026-09-27 12:00 |
06:15:14.38 |
-08:10:36.5 |
HIP 29672 |
27.15 |
| 2026-09-28 00:00 |
06:15:16.53 |
-08:11:52.9 |
HIP 29672 |
25.94 |
| 2026-09-28 12:00 |
06:15:18.58 |
-08:13:09.5 |
HIP 29672 |
24.74 |
| 2026-09-29 00:00 |
06:15:20.53 |
-08:14:26.1 |
HIP 29672 |
23.55 |
| 2026-09-29 12:00 |
06:15:22.38 |
-08:15:42.8 |
HIP 29672 |
22.39 |
| 2026-09-30 00:00 |
06:15:24.12 |
-08:16:59.6 |
HIP 29672 |
21.23 |
| 2026-09-30 12:00 |
06:15:25.76 |
-08:18:16.4 |
HIP 29672 |
20.09 |
| 2026-10-01 00:00 |
06:15:27.30 |
-08:19:33.3 |
HIP 29672 |
18.98 |
| 2026-10-01 12:00 |
06:15:28.73 |
-08:20:50.1 |
HIP 29672 |
17.88 |
| 2026-10-02 00:00 |
06:15:30.06 |
-08:22:07.1 |
HIP 29672 |
16.80 |
| 2026-10-02 12:00 |
06:15:31.29 |
-08:23:24.0 |
HIP 29672 |
15.75 |
| 2026-10-03 00:00 |
06:15:32.41 |
-08:24:41.0 |
HIP 29672 |
14.74 |
| 2026-10-03 12:00 |
06:15:33.43 |
-08:25:57.9 |
HIP 29672 |
13.76 |
| 2026-10-04 00:00 |
06:15:34.35 |
-08:27:14.9 |
HIP 29672 |
12.82 |
| 2026-10-04 12:00 |
06:15:35.16 |
-08:28:31.9 |
HIP 29672 |
11.93 |
| 2026-10-05 00:00 |
06:15:35.86 |
-08:29:48.8 |
HIP 29672 |
11.11 |
| 2026-10-05 12:00 |
06:15:36.46 |
-08:31:05.8 |
HIP 29672 |
10.36 |
| 2026-10-06 00:00 |
06:15:36.95 |
-08:32:22.7 |
HIP 29672 |
9.70 |
| 2026-10-06 12:00 |
06:15:37.34 |
-08:33:39.5 |
HIP 29672 |
9.16 |
| 2026-10-07 00:00 |
06:15:37.62 |
-08:34:56.4 |
HIP 29672 |
8.75 |
| 2026-10-07 12:00 |
06:15:37.80 |
-08:36:13.1 |
HIP 29672 |
8.49 |
| 2026-10-08 00:00 |
06:15:37.87 |
-08:37:29.8 |
HIP 29672 |
8.39 |
| 2026-10-08 12:00 |
06:15:37.83 |
-08:38:46.5 |
HIP 29672 |
8.45 |
| 2026-10-09 00:00 |
06:15:37.69 |
-08:40:03.1 |
HIP 29672 |
8.68 |
| 2026-10-09 12:00 |
06:15:37.43 |
-08:41:19.5 |
HIP 29672 |
9.07 |
| 2026-10-10 00:00 |
06:15:37.08 |
-08:42:35.9 |
HIP 29672 |
9.58 |
| 2026-10-10 12:00 |
06:15:36.61 |
-08:43:52.2 |
HIP 29672 |
10.20 |
| 2026-10-11 00:00 |
06:15:36.04 |
-08:45:08.4 |
HIP 29657 |
10.68 |