メタデータ
| 項目 |
値 |
| Designation |
C/1985 K1 (Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1985-06-28T17:43:33.605760Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:31Z |
| Obs used |
30 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1985-06-19.0000000 |
| e |
1.00000000 |
| q (au) |
0.106250 |
| a (au) |
- |
| i (deg) |
16.276479 |
| Ω (om, deg) |
195.434274 |
| ω (w, deg) |
274.501133 |
| M (ma, deg) |
- |
等級
散乱 + 全体線形
$$
M_a = (9.225 + 3.309\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.225 |
| n |
3.309 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
18:55:53.65 |
-06:26:52.3 |
HIP 92868 |
31.95 |
| 2026-09-20 12:00 |
18:55:53.21 |
-06:27:00.2 |
HIP 92868 |
31.80 |
| 2026-09-21 00:00 |
18:55:52.78 |
-06:27:08.0 |
HIP 92868 |
31.65 |
| 2026-09-21 12:00 |
18:55:52.37 |
-06:27:15.8 |
HIP 92868 |
31.50 |
| 2026-09-22 00:00 |
18:55:51.97 |
-06:27:23.7 |
HIP 92868 |
31.36 |
| 2026-09-22 12:00 |
18:55:51.59 |
-06:27:31.5 |
HIP 92868 |
31.21 |
| 2026-09-23 00:00 |
18:55:51.22 |
-06:27:39.3 |
HIP 92868 |
31.06 |
| 2026-09-23 12:00 |
18:55:50.86 |
-06:27:47.1 |
HIP 92868 |
30.92 |
| 2026-09-24 00:00 |
18:55:50.53 |
-06:27:54.9 |
HIP 92868 |
30.77 |
| 2026-09-24 12:00 |
18:55:50.20 |
-06:28:02.6 |
HIP 92868 |
30.63 |
| 2026-09-25 00:00 |
18:55:49.89 |
-06:28:10.4 |
HIP 92868 |
30.49 |
| 2026-09-25 12:00 |
18:55:49.60 |
-06:28:18.2 |
HIP 92868 |
30.35 |
| 2026-09-26 00:00 |
18:55:49.32 |
-06:28:25.9 |
HIP 92868 |
30.20 |
| 2026-09-26 12:00 |
18:55:49.06 |
-06:28:33.7 |
HIP 92868 |
30.07 |
| 2026-09-27 00:00 |
18:55:48.81 |
-06:28:41.4 |
HIP 92868 |
29.93 |
| 2026-09-27 12:00 |
18:55:48.57 |
-06:28:49.1 |
HIP 92868 |
29.79 |
| 2026-09-28 00:00 |
18:55:48.36 |
-06:28:56.8 |
HIP 92868 |
29.65 |
| 2026-09-28 12:00 |
18:55:48.15 |
-06:29:04.5 |
HIP 92868 |
29.52 |
| 2026-09-29 00:00 |
18:55:47.96 |
-06:29:12.2 |
HIP 92868 |
29.38 |
| 2026-09-29 12:00 |
18:55:47.79 |
-06:29:19.8 |
HIP 92868 |
29.25 |
| 2026-09-30 00:00 |
18:55:47.63 |
-06:29:27.5 |
HIP 92868 |
29.12 |
| 2026-09-30 12:00 |
18:55:47.49 |
-06:29:35.1 |
HIP 92868 |
28.99 |
| 2026-10-01 00:00 |
18:55:47.36 |
-06:29:42.7 |
HIP 92868 |
28.86 |
| 2026-10-01 12:00 |
18:55:47.24 |
-06:29:50.3 |
HIP 92868 |
28.73 |
| 2026-10-02 00:00 |
18:55:47.15 |
-06:29:57.9 |
HIP 92868 |
28.60 |
| 2026-10-02 12:00 |
18:55:47.06 |
-06:30:05.4 |
HIP 92868 |
28.47 |
| 2026-10-03 00:00 |
18:55:46.99 |
-06:30:13.0 |
HIP 92868 |
28.34 |
| 2026-10-03 12:00 |
18:55:46.94 |
-06:30:20.5 |
HIP 92868 |
28.22 |
| 2026-10-04 00:00 |
18:55:46.90 |
-06:30:28.0 |
HIP 92868 |
28.09 |
| 2026-10-04 12:00 |
18:55:46.88 |
-06:30:35.5 |
HIP 92868 |
27.97 |
| 2026-10-05 00:00 |
18:55:46.88 |
-06:30:42.9 |
HIP 92868 |
27.85 |
| 2026-10-05 12:00 |
18:55:46.88 |
-06:30:50.4 |
HIP 92868 |
27.73 |
| 2026-10-06 00:00 |
18:55:46.91 |
-06:30:57.8 |
HIP 92868 |
27.61 |
| 2026-10-06 12:00 |
18:55:46.95 |
-06:31:05.2 |
HIP 92868 |
27.49 |
| 2026-10-07 00:00 |
18:55:47.00 |
-06:31:12.6 |
HIP 92868 |
27.37 |
| 2026-10-07 12:00 |
18:55:47.07 |
-06:31:19.9 |
HIP 92868 |
27.25 |
| 2026-10-08 00:00 |
18:55:47.15 |
-06:31:27.2 |
HIP 92868 |
27.14 |
| 2026-10-08 12:00 |
18:55:47.25 |
-06:31:34.5 |
HIP 92868 |
27.02 |
| 2026-10-09 00:00 |
18:55:47.37 |
-06:31:41.8 |
HIP 92868 |
26.91 |
| 2026-10-09 12:00 |
18:55:47.50 |
-06:31:49.1 |
HIP 92868 |
26.80 |
| 2026-10-10 00:00 |
18:55:47.65 |
-06:31:56.3 |
HIP 92868 |
26.69 |
| 2026-10-10 12:00 |
18:55:47.81 |
-06:32:03.5 |
HIP 92868 |
26.58 |
| 2026-10-11 00:00 |
18:55:47.98 |
-06:32:10.7 |
HIP 92868 |
26.47 |