メタデータ
| 項目 |
値 |
| Designation |
45P/Honda-Mrkos-Pajdusakova |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-12-31T06:49:10.395840Z |
| Orbit solution date (soln_date, UTC) |
2022-07-19T02:06:34Z |
| Obs used |
1823 |
| NEO |
Yes |
| M1 |
13.700 |
| K1 |
22.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-08-14.0000000 |
| e |
0.82399608 |
| q (au) |
0.532650 |
| a (au) |
3.026354 |
| i (deg) |
4.248171 |
| Ω (om, deg) |
88.934602 |
| ω (w, deg) |
326.344198 |
| M (ma, deg) |
42.255824 |
等級
散乱 + 全体線形
$$
M_a = (9.001 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.001 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.852 |
| 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) |
| 2026-06-01 00:00 |
17:02:05.30 |
-21:32:43.8 |
HIP 83224 |
22.79 |
| 2026-06-01 12:00 |
17:01:37.63 |
-21:32:12.0 |
HIP 83224 |
16.43 |
| 2026-06-02 00:00 |
17:01:09.88 |
-21:31:39.8 |
HIP 83224 |
10.15 |
| 2026-06-02 12:00 |
17:00:42.05 |
-21:31:07.3 |
HIP 83224 |
4.47 |
| 2026-06-03 00:00 |
17:00:14.15 |
-21:30:34.5 |
HIP 83224 |
4.63 |
| 2026-06-03 12:00 |
16:59:46.19 |
-21:30:01.5 |
HIP 83224 |
10.39 |
| 2026-06-04 00:00 |
16:59:18.16 |
-21:29:28.1 |
HIP 83224 |
16.74 |
| 2026-06-04 12:00 |
16:58:50.07 |
-21:28:54.5 |
HIP 83224 |
23.22 |
| 2026-06-05 00:00 |
16:58:21.92 |
-21:28:20.6 |
HIP 83005 |
20.41 |
| 2026-06-05 12:00 |
16:57:53.73 |
-21:27:46.4 |
HIP 83005 |
18.94 |
| 2026-06-06 00:00 |
16:57:25.48 |
-21:27:11.9 |
HIP 83005 |
19.69 |
| 2026-06-06 12:00 |
16:56:57.20 |
-21:26:37.2 |
HIP 82822 |
21.09 |
| 2026-06-07 00:00 |
16:56:28.87 |
-21:26:02.2 |
HIP 82822 |
15.42 |
| 2026-06-07 12:00 |
16:56:00.51 |
-21:25:27.0 |
HIP 82822 |
10.88 |
| 2026-06-08 00:00 |
16:55:32.13 |
-21:24:51.5 |
HIP 82822 |
9.31 |
| 2026-06-08 12:00 |
16:55:03.71 |
-21:24:15.7 |
HIP 82822 |
11.96 |
| 2026-06-09 00:00 |
16:54:35.28 |
-21:23:39.8 |
HIP 82822 |
16.97 |
| 2026-06-09 12:00 |
16:54:06.83 |
-21:23:03.6 |
HIP 82822 |
22.83 |
| 2026-06-10 00:00 |
16:53:38.37 |
-21:22:27.1 |
HIP 82519 |
23.88 |
| 2026-06-10 12:00 |
16:53:09.90 |
-21:21:50.5 |
HIP 82519 |
17.23 |
| 2026-06-11 00:00 |
16:52:41.43 |
-21:21:13.7 |
HIP 82519 |
10.58 |
| 2026-06-11 12:00 |
16:52:12.96 |
-21:20:36.6 |
HIP 82519 |
3.93 |
| 2026-06-12 00:00 |
16:51:44.50 |
-21:19:59.4 |
HIP 82519 |
2.78 |
| 2026-06-12 12:00 |
16:51:16.05 |
-21:19:21.9 |
HIP 82519 |
9.41 |
| 2026-06-13 00:00 |
16:50:47.61 |
-21:18:44.3 |
HIP 82519 |
16.06 |
| 2026-06-13 12:00 |
16:50:19.20 |
-21:18:06.5 |
HIP 82519 |
22.71 |
| 2026-06-14 00:00 |
16:49:50.81 |
-21:17:28.6 |
HIP 82519 |
29.35 |
| 2026-06-14 12:00 |
16:49:22.46 |
-21:16:50.5 |
HIP 82244 |
25.79 |
| 2026-06-15 00:00 |
16:48:54.13 |
-21:16:12.3 |
HIP 82244 |
21.64 |
| 2026-06-15 12:00 |
16:48:25.85 |
-21:15:33.9 |
HIP 82244 |
18.97 |
| 2026-06-16 00:00 |
16:47:57.62 |
-21:14:55.4 |
HIP 82244 |
18.41 |
| 2026-06-16 12:00 |
16:47:29.43 |
-21:14:16.7 |
HIP 82244 |
20.14 |
| 2026-06-17 00:00 |
16:47:01.30 |
-21:13:38.0 |
HIP 82244 |
23.64 |
| 2026-06-17 12:00 |
16:46:33.22 |
-21:12:59.1 |
HIP 82244 |
28.25 |
| 2026-06-18 00:00 |
16:46:05.21 |
-21:12:20.2 |
HIP 82244 |
33.52 |
| 2026-06-18 12:00 |
16:45:37.27 |
-21:11:41.2 |
HIP 81844 |
37.39 |
| 2026-06-19 00:00 |
16:45:09.40 |
-21:11:02.1 |
HIP 81844 |
31.32 |
| 2026-06-19 12:00 |
16:44:41.61 |
-21:10:22.9 |
HIP 81844 |
25.49 |
| 2026-06-20 00:00 |
16:44:13.90 |
-21:09:43.7 |
HIP 81844 |
20.10 |
| 2026-06-20 12:00 |
16:43:46.28 |
-21:09:04.4 |
HIP 81844 |
15.59 |
| 2026-06-21 00:00 |
16:43:18.74 |
-21:08:25.1 |
HIP 81844 |
12.87 |
| 2026-06-21 12:00 |
16:42:51.30 |
-21:07:45.8 |
HIP 81844 |
13.10 |
| 2026-06-22 00:00 |
16:42:23.96 |
-21:07:06.4 |
HIP 81844 |
16.11 |