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 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
13:34:36.80 |
-39:05:16.8 |
HIP 66238 |
10.94 |
| 2026-03-26 12:00 |
13:34:34.59 |
-39:05:12.7 |
HIP 66238 |
10.85 |
| 2026-03-27 00:00 |
13:34:32.38 |
-39:05:08.6 |
HIP 66238 |
10.77 |
| 2026-03-27 12:00 |
13:34:30.16 |
-39:05:04.3 |
HIP 66238 |
10.70 |
| 2026-03-28 00:00 |
13:34:27.93 |
-39:04:59.8 |
HIP 66238 |
10.66 |
| 2026-03-28 12:00 |
13:34:25.69 |
-39:04:55.2 |
HIP 66238 |
10.62 |
| 2026-03-29 00:00 |
13:34:23.45 |
-39:04:50.5 |
HIP 66238 |
10.61 |
| 2026-03-29 12:00 |
13:34:21.20 |
-39:04:45.6 |
HIP 66238 |
10.61 |
| 2026-03-30 00:00 |
13:34:18.94 |
-39:04:40.5 |
HIP 66238 |
10.62 |
| 2026-03-30 12:00 |
13:34:16.68 |
-39:04:35.3 |
HIP 66238 |
10.66 |
| 2026-03-31 00:00 |
13:34:14.42 |
-39:04:30.0 |
HIP 66238 |
10.71 |
| 2026-03-31 12:00 |
13:34:12.15 |
-39:04:24.5 |
HIP 66238 |
10.77 |
| 2026-04-01 00:00 |
13:34:09.87 |
-39:04:18.9 |
HIP 66238 |
10.85 |
| 2026-04-01 12:00 |
13:34:07.59 |
-39:04:13.1 |
HIP 66238 |
10.95 |
| 2026-04-02 00:00 |
13:34:05.30 |
-39:04:07.2 |
HIP 66238 |
11.07 |
| 2026-04-02 12:00 |
13:34:03.01 |
-39:04:01.1 |
HIP 66238 |
11.20 |
| 2026-04-03 00:00 |
13:34:00.71 |
-39:03:54.9 |
HIP 66238 |
11.35 |
| 2026-04-03 12:00 |
13:33:58.41 |
-39:03:48.5 |
HIP 66238 |
11.51 |
| 2026-04-04 00:00 |
13:33:56.10 |
-39:03:42.0 |
HIP 66238 |
11.68 |
| 2026-04-04 12:00 |
13:33:53.79 |
-39:03:35.4 |
HIP 66238 |
11.87 |
| 2026-04-05 00:00 |
13:33:51.48 |
-39:03:28.6 |
HIP 66238 |
12.07 |
| 2026-04-05 12:00 |
13:33:49.16 |
-39:03:21.6 |
HIP 66129 |
12.07 |
| 2026-04-06 00:00 |
13:33:46.84 |
-39:03:14.6 |
HIP 66129 |
11.79 |
| 2026-04-06 12:00 |
13:33:44.52 |
-39:03:07.4 |
HIP 66129 |
11.51 |
| 2026-04-07 00:00 |
13:33:42.19 |
-39:03:00.0 |
HIP 66129 |
11.25 |
| 2026-04-07 12:00 |
13:33:39.86 |
-39:02:52.5 |
HIP 66129 |
11.00 |
| 2026-04-08 00:00 |
13:33:37.53 |
-39:02:44.9 |
HIP 66129 |
10.76 |
| 2026-04-08 12:00 |
13:33:35.19 |
-39:02:37.1 |
HIP 66129 |
10.53 |
| 2026-04-09 00:00 |
13:33:32.85 |
-39:02:29.2 |
HIP 66129 |
10.32 |
| 2026-04-09 12:00 |
13:33:30.51 |
-39:02:21.1 |
HIP 66129 |
10.12 |
| 2026-04-10 00:00 |
13:33:28.17 |
-39:02:12.9 |
HIP 66129 |
9.94 |
| 2026-04-10 12:00 |
13:33:25.82 |
-39:02:04.6 |
HIP 66129 |
9.78 |
| 2026-04-11 00:00 |
13:33:23.47 |
-39:01:56.1 |
HIP 66129 |
9.63 |
| 2026-04-11 12:00 |
13:33:21.12 |
-39:01:47.5 |
HIP 66129 |
9.51 |
| 2026-04-12 00:00 |
13:33:18.77 |
-39:01:38.8 |
HIP 66129 |
9.40 |
| 2026-04-12 12:00 |
13:33:16.42 |
-39:01:29.9 |
HIP 66129 |
9.32 |
| 2026-04-13 00:00 |
13:33:14.07 |
-39:01:20.9 |
HIP 66129 |
9.26 |
| 2026-04-13 12:00 |
13:33:11.72 |
-39:01:11.7 |
HIP 66129 |
9.22 |
| 2026-04-14 00:00 |
13:33:09.36 |
-39:01:02.5 |
HIP 66129 |
9.21 |
| 2026-04-14 12:00 |
13:33:07.01 |
-39:00:53.1 |
HIP 66129 |
9.21 |
| 2026-04-15 00:00 |
13:33:04.66 |
-39:00:43.5 |
HIP 66129 |
9.24 |
| 2026-04-15 12:00 |
13:33:02.30 |
-39:00:33.9 |
HIP 66129 |
9.30 |
| 2026-04-16 00:00 |
13:32:59.95 |
-39:00:24.1 |
HIP 66129 |
9.38 |