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 |
-0.936 |
| 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) |
| 2026-05-12 00:00 |
05:27:57.21 |
-07:00:30.2 |
HIP 25522 |
8.45 |
| 2026-05-12 12:00 |
05:28:08.69 |
-06:59:22.8 |
HIP 25536 |
10.33 |
| 2026-05-13 00:00 |
05:28:20.21 |
-06:58:15.9 |
HIP 25536 |
12.06 |
| 2026-05-13 12:00 |
05:28:31.78 |
-06:57:09.6 |
HIP 25536 |
14.26 |
| 2026-05-14 00:00 |
05:28:43.38 |
-06:56:03.9 |
HIP 25536 |
16.76 |
| 2026-05-14 12:00 |
05:28:55.03 |
-06:54:58.8 |
HIP 25681 |
17.10 |
| 2026-05-15 00:00 |
05:29:06.71 |
-06:53:54.3 |
HIP 25681 |
15.81 |
| 2026-05-15 12:00 |
05:29:18.44 |
-06:52:50.4 |
HIP 25681 |
15.08 |
| 2026-05-16 00:00 |
05:29:30.20 |
-06:51:47.1 |
HIP 25681 |
14.97 |
| 2026-05-16 12:00 |
05:29:42.00 |
-06:50:44.4 |
HIP 25681 |
15.51 |
| 2026-05-17 00:00 |
05:29:53.84 |
-06:49:42.3 |
HIP 25681 |
16.64 |
| 2026-05-17 12:00 |
05:30:05.71 |
-06:48:40.9 |
HIP 25681 |
18.25 |
| 2026-05-18 00:00 |
05:30:17.62 |
-06:47:40.0 |
HIP 25869 |
16.53 |
| 2026-05-18 12:00 |
05:30:29.57 |
-06:46:39.8 |
HIP 25869 |
13.40 |
| 2026-05-19 00:00 |
05:30:41.55 |
-06:45:40.1 |
HIP 25869 |
10.27 |
| 2026-05-19 12:00 |
05:30:53.56 |
-06:44:41.1 |
HIP 25869 |
7.13 |
| 2026-05-20 00:00 |
05:31:05.61 |
-06:43:42.7 |
HIP 25869 |
3.98 |
| 2026-05-20 12:00 |
05:31:17.69 |
-06:42:44.9 |
HIP 25869 |
0.83 |
| 2026-05-21 00:00 |
05:31:29.81 |
-06:41:47.7 |
HIP 25869 |
2.32 |
| 2026-05-21 12:00 |
05:31:41.95 |
-06:40:51.2 |
HIP 25869 |
5.48 |
| 2026-05-22 00:00 |
05:31:54.13 |
-06:39:55.2 |
HIP 25937 |
4.11 |
| 2026-05-22 12:00 |
05:32:06.33 |
-06:39:00.0 |
HIP 25937 |
3.50 |
| 2026-05-23 00:00 |
05:32:18.57 |
-06:38:05.2 |
HIP 25937 |
5.26 |
| 2026-05-23 12:00 |
05:32:30.83 |
-06:37:11.2 |
HIP 25937 |
7.95 |
| 2026-05-24 00:00 |
05:32:43.13 |
-06:36:17.7 |
HIP 25937 |
10.90 |
| 2026-05-24 12:00 |
05:32:55.45 |
-06:35:24.9 |
HIP 25937 |
13.95 |
| 2026-05-25 00:00 |
05:33:07.80 |
-06:34:32.7 |
HIP 25962 |
16.38 |
| 2026-05-25 12:00 |
05:33:20.17 |
-06:33:41.2 |
HIP 25962 |
18.28 |
| 2026-05-26 00:00 |
05:33:32.57 |
-06:32:50.2 |
HIP 26112 |
19.27 |
| 2026-05-26 12:00 |
05:33:45.00 |
-06:32:00.0 |
HIP 26112 |
18.98 |
| 2026-05-27 00:00 |
05:33:57.46 |
-06:31:10.3 |
HIP 26112 |
19.22 |
| 2026-05-27 12:00 |
05:34:09.94 |
-06:30:21.2 |
HIP 26112 |
19.96 |
| 2026-05-28 00:00 |
05:34:22.44 |
-06:29:32.8 |
HIP 26112 |
21.16 |
| 2026-05-28 12:00 |
05:34:34.97 |
-06:28:45.0 |
HIP 26112 |
22.75 |
| 2026-05-29 00:00 |
05:34:47.52 |
-06:27:57.8 |
HIP 26112 |
24.64 |
| 2026-05-29 12:00 |
05:35:00.09 |
-06:27:11.3 |
HIP 26327 |
26.42 |
| 2026-05-30 00:00 |
05:35:12.68 |
-06:26:25.4 |
HIP 26327 |
24.49 |
| 2026-05-30 12:00 |
05:35:25.30 |
-06:25:40.1 |
HIP 26327 |
22.85 |
| 2026-05-31 00:00 |
05:35:37.94 |
-06:24:55.5 |
HIP 26327 |
21.55 |
| 2026-05-31 12:00 |
05:35:50.60 |
-06:24:11.5 |
HIP 26327 |
20.67 |
| 2026-06-01 00:00 |
05:36:03.27 |
-06:23:28.1 |
HIP 26327 |
20.25 |
| 2026-06-01 12:00 |
05:36:15.97 |
-06:22:45.4 |
HIP 26403 |
18.78 |
| 2026-06-02 00:00 |
05:36:28.69 |
-06:22:03.3 |
HIP 26403 |
17.04 |