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) |
| 2026-05-12 00:00 |
13:31:02.38 |
-38:49:19.1 |
HIP 65910 |
5.91 |
| 2026-05-12 12:00 |
13:31:00.30 |
-38:49:03.8 |
HIP 65910 |
5.77 |
| 2026-05-13 00:00 |
13:30:58.22 |
-38:48:48.4 |
HIP 65910 |
5.66 |
| 2026-05-13 12:00 |
13:30:56.15 |
-38:48:33.0 |
HIP 65910 |
5.59 |
| 2026-05-14 00:00 |
13:30:54.10 |
-38:48:17.5 |
HIP 65910 |
5.56 |
| 2026-05-14 12:00 |
13:30:52.05 |
-38:48:01.9 |
HIP 65910 |
5.58 |
| 2026-05-15 00:00 |
13:30:50.02 |
-38:47:46.2 |
HIP 65910 |
5.64 |
| 2026-05-15 12:00 |
13:30:47.99 |
-38:47:30.5 |
HIP 65910 |
5.74 |
| 2026-05-16 00:00 |
13:30:45.98 |
-38:47:14.7 |
HIP 65910 |
5.88 |
| 2026-05-16 12:00 |
13:30:43.97 |
-38:46:58.8 |
HIP 65910 |
6.05 |
| 2026-05-17 00:00 |
13:30:41.98 |
-38:46:42.9 |
HIP 65910 |
6.26 |
| 2026-05-17 12:00 |
13:30:39.99 |
-38:46:26.9 |
HIP 65910 |
6.49 |
| 2026-05-18 00:00 |
13:30:38.02 |
-38:46:10.8 |
HIP 65910 |
6.75 |
| 2026-05-18 12:00 |
13:30:36.06 |
-38:45:54.7 |
HIP 65910 |
7.03 |
| 2026-05-19 00:00 |
13:30:34.12 |
-38:45:38.5 |
HIP 65910 |
7.33 |
| 2026-05-19 12:00 |
13:30:32.18 |
-38:45:22.3 |
HIP 65910 |
7.65 |
| 2026-05-20 00:00 |
13:30:30.25 |
-38:45:06.0 |
HIP 65910 |
7.99 |
| 2026-05-20 12:00 |
13:30:28.34 |
-38:44:49.6 |
HIP 65910 |
8.33 |
| 2026-05-21 00:00 |
13:30:26.44 |
-38:44:33.2 |
HIP 65910 |
8.69 |
| 2026-05-21 12:00 |
13:30:24.55 |
-38:44:16.8 |
HIP 65910 |
9.06 |
| 2026-05-22 00:00 |
13:30:22.68 |
-38:44:00.3 |
HIP 65910 |
9.43 |
| 2026-05-22 12:00 |
13:30:20.81 |
-38:43:43.7 |
HIP 65910 |
9.81 |
| 2026-05-23 00:00 |
13:30:18.96 |
-38:43:27.1 |
HIP 65910 |
10.20 |
| 2026-05-23 12:00 |
13:30:17.12 |
-38:43:10.4 |
HIP 65910 |
10.60 |
| 2026-05-24 00:00 |
13:30:15.30 |
-38:42:53.7 |
HIP 65910 |
10.99 |
| 2026-05-24 12:00 |
13:30:13.49 |
-38:42:37.0 |
HIP 65910 |
11.39 |
| 2026-05-25 00:00 |
13:30:11.69 |
-38:42:20.2 |
HIP 65910 |
11.80 |
| 2026-05-25 12:00 |
13:30:09.90 |
-38:42:03.3 |
HIP 65910 |
12.20 |
| 2026-05-26 00:00 |
13:30:08.13 |
-38:41:46.5 |
HIP 65829 |
12.28 |
| 2026-05-26 12:00 |
13:30:06.37 |
-38:41:29.6 |
HIP 65829 |
11.88 |
| 2026-05-27 00:00 |
13:30:04.62 |
-38:41:12.6 |
HIP 65829 |
11.48 |
| 2026-05-27 12:00 |
13:30:02.89 |
-38:40:55.6 |
HIP 65829 |
11.09 |
| 2026-05-28 00:00 |
13:30:01.17 |
-38:40:38.6 |
HIP 65829 |
10.70 |
| 2026-05-28 12:00 |
13:29:59.47 |
-38:40:21.5 |
HIP 65829 |
10.31 |
| 2026-05-29 00:00 |
13:29:57.78 |
-38:40:04.4 |
HIP 65829 |
9.93 |
| 2026-05-29 12:00 |
13:29:56.10 |
-38:39:47.3 |
HIP 65829 |
9.56 |
| 2026-05-30 00:00 |
13:29:54.44 |
-38:39:30.1 |
HIP 65829 |
9.19 |
| 2026-05-30 12:00 |
13:29:52.79 |
-38:39:12.9 |
HIP 65829 |
8.83 |
| 2026-05-31 00:00 |
13:29:51.16 |
-38:38:55.7 |
HIP 65829 |
8.47 |
| 2026-05-31 12:00 |
13:29:49.54 |
-38:38:38.4 |
HIP 65829 |
8.12 |
| 2026-06-01 00:00 |
13:29:47.94 |
-38:38:21.2 |
HIP 65829 |
7.78 |
| 2026-06-01 12:00 |
13:29:46.35 |
-38:38:03.9 |
HIP 65829 |
7.45 |
| 2026-06-02 00:00 |
13:29:44.78 |
-38:37:46.5 |
HIP 65829 |
7.13 |