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) |
| 2026-07-29 00:00 |
16:17:06.45 |
-20:29:23.8 |
HIP 79788 |
23.21 |
| 2026-07-29 12:00 |
16:16:55.07 |
-20:29:10.6 |
HIP 79788 |
22.95 |
| 2026-07-30 00:00 |
16:16:43.96 |
-20:28:58.0 |
HIP 79788 |
23.00 |
| 2026-07-30 12:00 |
16:16:33.12 |
-20:28:46.0 |
HIP 79788 |
23.34 |
| 2026-07-31 00:00 |
16:16:22.57 |
-20:28:34.7 |
HIP 79788 |
23.93 |
| 2026-07-31 12:00 |
16:16:12.29 |
-20:28:24.0 |
HIP 79690 |
24.36 |
| 2026-08-01 00:00 |
16:16:02.29 |
-20:28:14.0 |
HIP 79690 |
23.81 |
| 2026-08-01 12:00 |
16:15:52.57 |
-20:28:04.6 |
HIP 79606 |
22.02 |
| 2026-08-02 00:00 |
16:15:43.13 |
-20:27:55.9 |
HIP 79606 |
20.26 |
| 2026-08-02 12:00 |
16:15:33.96 |
-20:27:47.8 |
HIP 79606 |
18.66 |
| 2026-08-03 00:00 |
16:15:25.08 |
-20:27:40.4 |
HIP 79606 |
17.22 |
| 2026-08-03 12:00 |
16:15:16.48 |
-20:27:33.6 |
HIP 79606 |
15.97 |
| 2026-08-04 00:00 |
16:15:08.15 |
-20:27:27.5 |
HIP 79606 |
14.93 |
| 2026-08-04 12:00 |
16:15:00.11 |
-20:27:22.1 |
HIP 79606 |
14.12 |
| 2026-08-05 00:00 |
16:14:52.34 |
-20:27:17.3 |
HIP 79606 |
13.55 |
| 2026-08-05 12:00 |
16:14:44.86 |
-20:27:13.2 |
HIP 79606 |
13.22 |
| 2026-08-06 00:00 |
16:14:37.66 |
-20:27:09.8 |
HIP 79606 |
13.13 |
| 2026-08-06 12:00 |
16:14:30.73 |
-20:27:07.0 |
HIP 79606 |
13.26 |
| 2026-08-07 00:00 |
16:14:24.09 |
-20:27:04.9 |
HIP 79606 |
13.57 |
| 2026-08-07 12:00 |
16:14:17.73 |
-20:27:03.5 |
HIP 79606 |
14.04 |
| 2026-08-08 00:00 |
16:14:11.65 |
-20:27:02.8 |
HIP 79606 |
14.62 |
| 2026-08-08 12:00 |
16:14:05.85 |
-20:27:02.7 |
HIP 79606 |
15.29 |
| 2026-08-09 00:00 |
16:14:00.33 |
-20:27:03.4 |
HIP 79606 |
16.01 |
| 2026-08-09 12:00 |
16:13:55.10 |
-20:27:04.7 |
HIP 79606 |
16.78 |
| 2026-08-10 00:00 |
16:13:50.14 |
-20:27:06.7 |
HIP 79606 |
17.56 |
| 2026-08-10 12:00 |
16:13:45.47 |
-20:27:09.4 |
HIP 79606 |
18.34 |
| 2026-08-11 00:00 |
16:13:41.07 |
-20:27:12.8 |
HIP 79606 |
19.11 |
| 2026-08-11 12:00 |
16:13:36.96 |
-20:27:16.8 |
HIP 79606 |
19.87 |
| 2026-08-12 00:00 |
16:13:33.13 |
-20:27:21.6 |
HIP 79606 |
20.60 |
| 2026-08-12 12:00 |
16:13:29.57 |
-20:27:27.0 |
HIP 79606 |
21.30 |
| 2026-08-13 00:00 |
16:13:26.30 |
-20:27:33.1 |
HIP 79606 |
21.96 |
| 2026-08-13 12:00 |
16:13:23.31 |
-20:27:39.9 |
HIP 79606 |
22.59 |
| 2026-08-14 00:00 |
16:13:20.59 |
-20:27:47.4 |
HIP 79606 |
23.17 |
| 2026-08-14 12:00 |
16:13:18.15 |
-20:27:55.5 |
HIP 79606 |
23.71 |
| 2026-08-15 00:00 |
16:13:16.00 |
-20:28:04.3 |
HIP 79606 |
24.21 |
| 2026-08-15 12:00 |
16:13:14.11 |
-20:28:13.9 |
HIP 79606 |
24.66 |
| 2026-08-16 00:00 |
16:13:12.51 |
-20:28:24.0 |
HIP 79606 |
25.06 |
| 2026-08-16 12:00 |
16:13:11.18 |
-20:28:34.9 |
HIP 79606 |
25.42 |
| 2026-08-17 00:00 |
16:13:10.13 |
-20:28:46.4 |
HIP 79606 |
25.74 |
| 2026-08-17 12:00 |
16:13:09.35 |
-20:28:58.6 |
HIP 79606 |
26.00 |
| 2026-08-18 00:00 |
16:13:08.85 |
-20:29:11.5 |
HIP 79606 |
26.22 |
| 2026-08-18 12:00 |
16:13:08.61 |
-20:29:25.0 |
HIP 79606 |
26.40 |
| 2026-08-19 00:00 |
16:13:08.66 |
-20:29:39.2 |
HIP 79606 |
26.53 |