メタデータ
| 項目 |
値 |
| Designation |
C/1994 N1 (Nakamura-Nishimura-Machholz) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-07-12T22:33:27.740160Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
305 |
| NEO |
- |
| M1 |
11.300 |
| K1 |
12.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1994-08-10.0000000 |
| e |
1.00000419 |
| q (au) |
1.140140 |
| a (au) |
-272260.819970 |
| i (deg) |
94.378024 |
| Ω (om, deg) |
158.912250 |
| ω (w, deg) |
123.071914 |
| M (ma, deg) |
0.000000 |
等級
散乱 + 全体線形
$$
M_a = (7.704 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
7.704 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.733 |
| k |
0.998 |
| 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) |
| 2026-06-01 00:00 |
08:15:48.18 |
-58:56:53.4 |
HIP 40621 |
20.36 |
| 2026-06-01 12:00 |
08:15:50.73 |
-58:56:29.2 |
HIP 40621 |
19.84 |
| 2026-06-02 00:00 |
08:15:53.30 |
-58:56:05.2 |
HIP 40621 |
19.32 |
| 2026-06-02 12:00 |
08:15:55.90 |
-58:55:41.4 |
HIP 40621 |
18.80 |
| 2026-06-03 00:00 |
08:15:58.52 |
-58:55:17.7 |
HIP 40621 |
18.28 |
| 2026-06-03 12:00 |
08:16:01.17 |
-58:54:54.3 |
HIP 40621 |
17.76 |
| 2026-06-04 00:00 |
08:16:03.84 |
-58:54:31.0 |
HIP 40621 |
17.24 |
| 2026-06-04 12:00 |
08:16:06.53 |
-58:54:07.8 |
HIP 40621 |
16.72 |
| 2026-06-05 00:00 |
08:16:09.25 |
-58:53:44.9 |
HIP 40621 |
16.21 |
| 2026-06-05 12:00 |
08:16:11.99 |
-58:53:22.2 |
HIP 40621 |
15.69 |
| 2026-06-06 00:00 |
08:16:14.76 |
-58:52:59.6 |
HIP 40621 |
15.17 |
| 2026-06-06 12:00 |
08:16:17.54 |
-58:52:37.2 |
HIP 40621 |
14.65 |
| 2026-06-07 00:00 |
08:16:20.35 |
-58:52:15.0 |
HIP 40621 |
14.13 |
| 2026-06-07 12:00 |
08:16:23.19 |
-58:51:53.0 |
HIP 40621 |
13.61 |
| 2026-06-08 00:00 |
08:16:26.04 |
-58:51:31.2 |
HIP 40621 |
13.10 |
| 2026-06-08 12:00 |
08:16:28.92 |
-58:51:09.6 |
HIP 40621 |
12.58 |
| 2026-06-09 00:00 |
08:16:31.83 |
-58:50:48.2 |
HIP 40621 |
12.06 |
| 2026-06-09 12:00 |
08:16:34.75 |
-58:50:27.0 |
HIP 40621 |
11.55 |
| 2026-06-10 00:00 |
08:16:37.69 |
-58:50:05.9 |
HIP 40621 |
11.03 |
| 2026-06-10 12:00 |
08:16:40.66 |
-58:49:45.1 |
HIP 40621 |
10.52 |
| 2026-06-11 00:00 |
08:16:43.65 |
-58:49:24.5 |
HIP 40621 |
10.00 |
| 2026-06-11 12:00 |
08:16:46.66 |
-58:49:04.0 |
HIP 40621 |
9.49 |
| 2026-06-12 00:00 |
08:16:49.69 |
-58:48:43.8 |
HIP 40621 |
8.98 |
| 2026-06-12 12:00 |
08:16:52.74 |
-58:48:23.8 |
HIP 40621 |
8.47 |
| 2026-06-13 00:00 |
08:16:55.82 |
-58:48:04.0 |
HIP 40621 |
7.96 |
| 2026-06-13 12:00 |
08:16:58.91 |
-58:47:44.4 |
HIP 40621 |
7.46 |
| 2026-06-14 00:00 |
08:17:02.02 |
-58:47:25.0 |
HIP 40621 |
6.96 |
| 2026-06-14 12:00 |
08:17:05.16 |
-58:47:05.8 |
HIP 40621 |
6.46 |
| 2026-06-15 00:00 |
08:17:08.31 |
-58:46:46.8 |
HIP 40621 |
5.96 |
| 2026-06-15 12:00 |
08:17:11.48 |
-58:46:28.0 |
HIP 40621 |
5.48 |
| 2026-06-16 00:00 |
08:17:14.67 |
-58:46:09.4 |
HIP 40621 |
5.00 |
| 2026-06-16 12:00 |
08:17:17.89 |
-58:45:51.1 |
HIP 40621 |
4.53 |
| 2026-06-17 00:00 |
08:17:21.12 |
-58:45:33.0 |
HIP 40621 |
4.07 |
| 2026-06-17 12:00 |
08:17:24.36 |
-58:45:15.0 |
HIP 40621 |
3.63 |
| 2026-06-18 00:00 |
08:17:27.63 |
-58:44:57.3 |
HIP 40621 |
3.22 |
| 2026-06-18 12:00 |
08:17:30.92 |
-58:44:39.9 |
HIP 40621 |
2.85 |
| 2026-06-19 00:00 |
08:17:34.22 |
-58:44:22.6 |
HIP 40621 |
2.53 |
| 2026-06-19 12:00 |
08:17:37.54 |
-58:44:05.6 |
HIP 40621 |
2.28 |
| 2026-06-20 00:00 |
08:17:40.88 |
-58:43:48.7 |
HIP 40621 |
2.14 |
| 2026-06-20 12:00 |
08:17:44.23 |
-58:43:32.2 |
HIP 40621 |
2.13 |
| 2026-06-21 00:00 |
08:17:47.60 |
-58:43:15.8 |
HIP 40621 |
2.24 |
| 2026-06-21 12:00 |
08:17:50.99 |
-58:42:59.6 |
HIP 40621 |
2.46 |
| 2026-06-22 00:00 |
08:17:54.40 |
-58:42:43.7 |
HIP 40621 |
2.76 |