メタデータ
| 項目 |
値 |
| Designation |
C/1992 N1 (Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1992-07-10T15:35:32.516160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:44Z |
| Obs used |
9 |
| NEO |
- |
| M1 |
9.700 |
| 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) |
1992-07-09.0000000 |
| e |
1.00462488 |
| q (au) |
0.819362 |
| a (au) |
-177.163937 |
| i (deg) |
57.567972 |
| Ω (om, deg) |
235.163990 |
| ω (w, deg) |
162.307854 |
| M (ma, deg) |
-0.000690 |
等級
散乱 + 全体線形
$$
M_a = (9.642 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.642 |
| n |
2.000 |
| gf |
0.997 |
| 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) |
| 2026-07-29 00:00 |
13:28:41.68 |
-38:07:30.0 |
HIP 65829 |
25.96 |
| 2026-07-29 12:00 |
13:28:42.22 |
-38:07:18.0 |
HIP 65829 |
26.09 |
| 2026-07-30 00:00 |
13:28:42.78 |
-38:07:06.1 |
HIP 65829 |
26.22 |
| 2026-07-30 12:00 |
13:28:43.36 |
-38:06:54.3 |
HIP 65829 |
26.35 |
| 2026-07-31 00:00 |
13:28:43.95 |
-38:06:42.6 |
HIP 65829 |
26.47 |
| 2026-07-31 12:00 |
13:28:44.57 |
-38:06:31.0 |
HIP 65829 |
26.60 |
| 2026-08-01 00:00 |
13:28:45.20 |
-38:06:19.6 |
HIP 65829 |
26.72 |
| 2026-08-01 12:00 |
13:28:45.85 |
-38:06:08.2 |
HIP 65829 |
26.84 |
| 2026-08-02 00:00 |
13:28:46.52 |
-38:05:57.0 |
HIP 65829 |
26.96 |
| 2026-08-02 12:00 |
13:28:47.21 |
-38:05:45.9 |
HIP 65829 |
27.08 |
| 2026-08-03 00:00 |
13:28:47.92 |
-38:05:34.8 |
HIP 65829 |
27.19 |
| 2026-08-03 12:00 |
13:28:48.64 |
-38:05:23.9 |
HIP 65829 |
27.31 |
| 2026-08-04 00:00 |
13:28:49.38 |
-38:05:13.1 |
HIP 65829 |
27.42 |
| 2026-08-04 12:00 |
13:28:50.14 |
-38:05:02.5 |
HIP 65829 |
27.53 |
| 2026-08-05 00:00 |
13:28:50.92 |
-38:04:51.9 |
HIP 65829 |
27.64 |
| 2026-08-05 12:00 |
13:28:51.72 |
-38:04:41.4 |
HIP 65829 |
27.75 |
| 2026-08-06 00:00 |
13:28:52.54 |
-38:04:31.1 |
HIP 65829 |
27.85 |
| 2026-08-06 12:00 |
13:28:53.37 |
-38:04:20.9 |
HIP 65829 |
27.96 |
| 2026-08-07 00:00 |
13:28:54.22 |
-38:04:10.8 |
HIP 65829 |
28.06 |
| 2026-08-07 12:00 |
13:28:55.09 |
-38:04:00.8 |
HIP 65829 |
28.16 |
| 2026-08-08 00:00 |
13:28:55.98 |
-38:03:50.9 |
HIP 65829 |
28.26 |
| 2026-08-08 12:00 |
13:28:56.89 |
-38:03:41.2 |
HIP 65829 |
28.36 |
| 2026-08-09 00:00 |
13:28:57.81 |
-38:03:31.6 |
HIP 65829 |
28.46 |
| 2026-08-09 12:00 |
13:28:58.75 |
-38:03:22.1 |
HIP 65829 |
28.56 |
| 2026-08-10 00:00 |
13:28:59.71 |
-38:03:12.7 |
HIP 65829 |
28.65 |
| 2026-08-10 12:00 |
13:29:00.68 |
-38:03:03.4 |
HIP 65829 |
28.75 |
| 2026-08-11 00:00 |
13:29:01.68 |
-38:02:54.3 |
HIP 65829 |
28.84 |
| 2026-08-11 12:00 |
13:29:02.69 |
-38:02:45.3 |
HIP 65829 |
28.93 |
| 2026-08-12 00:00 |
13:29:03.72 |
-38:02:36.4 |
HIP 65829 |
29.02 |
| 2026-08-12 12:00 |
13:29:04.76 |
-38:02:27.6 |
HIP 65829 |
29.11 |
| 2026-08-13 00:00 |
13:29:05.83 |
-38:02:19.0 |
HIP 65829 |
29.20 |
| 2026-08-13 12:00 |
13:29:06.91 |
-38:02:10.5 |
HIP 65819 |
29.14 |
| 2026-08-14 00:00 |
13:29:08.01 |
-38:02:02.1 |
HIP 65819 |
28.96 |
| 2026-08-14 12:00 |
13:29:09.12 |
-38:01:53.8 |
HIP 65819 |
28.78 |
| 2026-08-15 00:00 |
13:29:10.25 |
-38:01:45.7 |
HIP 65819 |
28.61 |
| 2026-08-15 12:00 |
13:29:11.40 |
-38:01:37.7 |
HIP 65819 |
28.44 |
| 2026-08-16 00:00 |
13:29:12.57 |
-38:01:29.8 |
HIP 65819 |
28.27 |
| 2026-08-16 12:00 |
13:29:13.75 |
-38:01:22.1 |
HIP 65819 |
28.11 |
| 2026-08-17 00:00 |
13:29:14.95 |
-38:01:14.4 |
HIP 65819 |
27.95 |
| 2026-08-17 12:00 |
13:29:16.16 |
-38:01:07.0 |
HIP 65819 |
27.79 |
| 2026-08-18 00:00 |
13:29:17.39 |
-38:00:59.6 |
HIP 65819 |
27.64 |
| 2026-08-18 12:00 |
13:29:18.64 |
-38:00:52.4 |
HIP 65819 |
27.48 |
| 2026-08-19 00:00 |
13:29:19.90 |
-38:00:45.3 |
HIP 65819 |
27.34 |