メタデータ
| 項目 |
値 |
| Designation |
96P/Machholz 1 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-10-27T23:03:31.547520Z |
| Orbit solution date (soln_date, UTC) |
2025-02-20T21:30:21Z |
| Obs used |
669 |
| NEO |
Yes |
| M1 |
13.700 |
| K1 |
8.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2017-07-27.0000000 |
| e |
0.95916084 |
| q (au) |
0.123950 |
| a (au) |
3.035069 |
| i (deg) |
58.137900 |
| Ω (om, deg) |
94.254723 |
| ω (w, deg) |
14.792845 |
| M (ma, deg) |
342.671895 |
等級
散乱 + 全体線形
$$
M_a = (13.089 + 4.780\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.089 |
| n |
4.780 |
| gf |
0.800 |
| gb |
-0.781 |
| k |
0.948 |
| δ90 |
1.000 |
| 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
残差 (区間線形)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| 開始日 (UTC) |
終了日 (UTC) |
a |
b |
| 2022-05-06 |
2023-01-31 |
-13.7766 |
-12.187 |
| 2023-01-31 |
2023-02-15 |
+1.6478 |
+0.513 |
| 2023-02-15 |
2024-07-14 |
-0.2364 |
-0.358 |
log10 r = log10(太陽距離/AU)、Δ = 地球距離(AU)
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-03-26 00:00 |
19:51:09.93 |
-35:11:04.9 |
HIP 97685 |
0.23 |
| 2026-03-26 12:00 |
19:51:20.38 |
-35:12:08.2 |
HIP 97685 |
2.21 |
| 2026-03-27 00:00 |
19:51:30.67 |
-35:13:12.4 |
HIP 97702 |
2.23 |
| 2026-03-27 12:00 |
19:51:40.81 |
-35:14:17.3 |
HIP 97702 |
3.98 |
| 2026-03-28 00:00 |
19:51:50.78 |
-35:15:23.0 |
HIP 97702 |
6.10 |
| 2026-03-28 12:00 |
19:52:00.60 |
-35:16:29.4 |
HIP 97702 |
8.30 |
| 2026-03-29 00:00 |
19:52:10.25 |
-35:17:36.6 |
HIP 97702 |
10.50 |
| 2026-03-29 12:00 |
19:52:19.75 |
-35:18:44.7 |
HIP 97698 |
12.65 |
| 2026-03-30 00:00 |
19:52:29.08 |
-35:19:53.5 |
HIP 97698 |
14.61 |
| 2026-03-30 12:00 |
19:52:38.24 |
-35:21:03.0 |
HIP 97698 |
16.60 |
| 2026-03-31 00:00 |
19:52:47.25 |
-35:22:13.4 |
HIP 97698 |
18.61 |
| 2026-03-31 12:00 |
19:52:56.08 |
-35:23:24.6 |
HIP 97698 |
20.62 |
| 2026-04-01 00:00 |
19:53:04.75 |
-35:24:36.5 |
HIP 97698 |
22.63 |
| 2026-04-01 12:00 |
19:53:13.26 |
-35:25:49.3 |
HIP 97698 |
24.63 |
| 2026-04-02 00:00 |
19:53:21.59 |
-35:27:02.8 |
HIP 97698 |
26.62 |
| 2026-04-02 12:00 |
19:53:29.75 |
-35:28:17.2 |
HIP 97698 |
28.59 |
| 2026-04-03 00:00 |
19:53:37.74 |
-35:29:32.3 |
HIP 97929 |
30.30 |
| 2026-04-03 12:00 |
19:53:45.56 |
-35:30:48.3 |
HIP 97929 |
28.76 |
| 2026-04-04 00:00 |
19:53:53.20 |
-35:32:05.0 |
HIP 97929 |
27.27 |
| 2026-04-04 12:00 |
19:54:00.67 |
-35:33:22.6 |
HIP 97929 |
25.85 |
| 2026-04-05 00:00 |
19:54:07.97 |
-35:34:41.0 |
HIP 97929 |
24.49 |
| 2026-04-05 12:00 |
19:54:15.08 |
-35:36:00.2 |
HIP 97929 |
23.21 |
| 2026-04-06 00:00 |
19:54:22.02 |
-35:37:20.2 |
HIP 97929 |
22.00 |
| 2026-04-06 12:00 |
19:54:28.77 |
-35:38:41.0 |
HIP 97929 |
20.89 |
| 2026-04-07 00:00 |
19:54:35.35 |
-35:40:02.6 |
HIP 97929 |
19.87 |
| 2026-04-07 12:00 |
19:54:41.74 |
-35:41:25.0 |
HIP 97929 |
18.97 |
| 2026-04-08 00:00 |
19:54:47.95 |
-35:42:48.3 |
HIP 97929 |
18.19 |
| 2026-04-08 12:00 |
19:54:53.98 |
-35:44:12.4 |
HIP 97929 |
17.55 |
| 2026-04-09 00:00 |
19:54:59.82 |
-35:45:37.3 |
HIP 97929 |
17.05 |
| 2026-04-09 12:00 |
19:55:05.47 |
-35:47:03.0 |
HIP 97929 |
16.70 |
| 2026-04-10 00:00 |
19:55:10.93 |
-35:48:29.6 |
HIP 97929 |
16.51 |
| 2026-04-10 12:00 |
19:55:16.21 |
-35:49:56.9 |
HIP 97929 |
16.48 |
| 2026-04-11 00:00 |
19:55:21.29 |
-35:51:25.1 |
HIP 97929 |
16.60 |
| 2026-04-11 12:00 |
19:55:26.18 |
-35:52:54.2 |
HIP 97929 |
16.87 |
| 2026-04-12 00:00 |
19:55:30.87 |
-35:54:24.0 |
HIP 97929 |
17.28 |
| 2026-04-12 12:00 |
19:55:35.37 |
-35:55:54.7 |
HIP 98008 |
17.51 |
| 2026-04-13 00:00 |
19:55:39.67 |
-35:57:26.2 |
HIP 98008 |
16.48 |
| 2026-04-13 12:00 |
19:55:43.78 |
-35:58:58.5 |
HIP 98008 |
15.56 |
| 2026-04-14 00:00 |
19:55:47.69 |
-36:00:31.7 |
HIP 98008 |
14.75 |
| 2026-04-14 12:00 |
19:55:51.39 |
-36:02:05.6 |
HIP 98008 |
14.07 |
| 2026-04-15 00:00 |
19:55:54.90 |
-36:03:40.4 |
HIP 98008 |
13.53 |
| 2026-04-15 12:00 |
19:55:58.20 |
-36:05:16.1 |
HIP 98008 |
13.17 |
| 2026-04-16 00:00 |
19:56:01.30 |
-36:06:52.5 |
HIP 98008 |
12.98 |