C/1994 N1 (Nakamura-Nishimura-Machholz)
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 |
-0.734 |
| 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) |
| 2026-02-03 00:00 |
08:20:21.37 |
-60:38:58.6 |
HIP 40998 |
12.27 |
| 2026-02-03 12:00 |
08:20:17.17 |
-60:38:50.4 |
HIP 40998 |
12.76 |
| 2026-02-04 00:00 |
08:20:12.98 |
-60:38:42.0 |
HIP 40998 |
13.25 |
| 2026-02-04 12:00 |
08:20:08.79 |
-60:38:33.3 |
HIP 40998 |
13.75 |
| 2026-02-05 00:00 |
08:20:04.62 |
-60:38:24.3 |
HIP 40998 |
14.24 |
| 2026-02-05 12:00 |
08:20:00.45 |
-60:38:15.1 |
HIP 40998 |
14.74 |
| 2026-02-06 00:00 |
08:19:56.29 |
-60:38:05.6 |
HIP 40998 |
15.24 |
| 2026-02-06 12:00 |
08:19:52.15 |
-60:37:55.7 |
HIP 40998 |
15.74 |
| 2026-02-07 00:00 |
08:19:48.01 |
-60:37:45.6 |
HIP 40998 |
16.24 |
| 2026-02-07 12:00 |
08:19:43.88 |
-60:37:35.3 |
HIP 40998 |
16.74 |
| 2026-02-08 00:00 |
08:19:39.77 |
-60:37:24.6 |
HIP 40998 |
17.25 |
| 2026-02-08 12:00 |
08:19:35.66 |
-60:37:13.7 |
HIP 40998 |
17.75 |
| 2026-02-09 00:00 |
08:19:31.57 |
-60:37:02.5 |
HIP 40998 |
18.25 |
| 2026-02-09 12:00 |
08:19:27.49 |
-60:36:51.0 |
HIP 40998 |
18.76 |
| 2026-02-10 00:00 |
08:19:23.42 |
-60:36:39.3 |
HIP 40998 |
19.26 |
| 2026-02-10 12:00 |
08:19:19.36 |
-60:36:27.3 |
HIP 40690 |
19.09 |
| 2026-02-11 00:00 |
08:19:15.32 |
-60:36:15.0 |
HIP 40690 |
18.72 |
| 2026-02-11 12:00 |
08:19:11.29 |
-60:36:02.4 |
HIP 40690 |
18.36 |
| 2026-02-12 00:00 |
08:19:07.27 |
-60:35:49.6 |
HIP 40690 |
18.00 |
| 2026-02-12 12:00 |
08:19:03.27 |
-60:35:36.5 |
HIP 40690 |
17.65 |
| 2026-02-13 00:00 |
08:18:59.28 |
-60:35:23.1 |
HIP 40690 |
17.30 |
| 2026-02-13 12:00 |
08:18:55.31 |
-60:35:09.5 |
HIP 40690 |
16.96 |
| 2026-02-14 00:00 |
08:18:51.35 |
-60:34:55.6 |
HIP 40690 |
16.63 |
| 2026-02-14 12:00 |
08:18:47.41 |
-60:34:41.4 |
HIP 40690 |
16.30 |
| 2026-02-15 00:00 |
08:18:43.48 |
-60:34:27.0 |
HIP 40690 |
15.98 |
| 2026-02-15 12:00 |
08:18:39.57 |
-60:34:12.3 |
HIP 40690 |
15.67 |
| 2026-02-16 00:00 |
08:18:35.68 |
-60:33:57.3 |
HIP 40690 |
15.36 |
| 2026-02-16 12:00 |
08:18:31.80 |
-60:33:42.1 |
HIP 40690 |
15.07 |
| 2026-02-17 00:00 |
08:18:27.94 |
-60:33:26.7 |
HIP 40690 |
14.78 |
| 2026-02-17 12:00 |
08:18:24.10 |
-60:33:10.9 |
HIP 40690 |
14.51 |
| 2026-02-18 00:00 |
08:18:20.27 |
-60:32:54.9 |
HIP 40666 |
14.21 |
| 2026-02-18 12:00 |
08:18:16.47 |
-60:32:38.7 |
HIP 40666 |
13.88 |
| 2026-02-19 00:00 |
08:18:12.68 |
-60:32:22.2 |
HIP 40666 |
13.57 |
| 2026-02-19 12:00 |
08:18:08.91 |
-60:32:05.5 |
HIP 40666 |
13.26 |
| 2026-02-20 00:00 |
08:18:05.16 |
-60:31:48.5 |
HIP 40666 |
12.97 |
| 2026-02-20 12:00 |
08:18:01.43 |
-60:31:31.2 |
HIP 40666 |
12.69 |
| 2026-02-21 00:00 |
08:17:57.71 |
-60:31:13.7 |
HIP 40666 |
12.43 |
| 2026-02-21 12:00 |
08:17:54.02 |
-60:30:56.0 |
HIP 40666 |
12.17 |
| 2026-02-22 00:00 |
08:17:50.35 |
-60:30:38.0 |
HIP 40666 |
11.94 |
| 2026-02-22 12:00 |
08:17:46.70 |
-60:30:19.8 |
HIP 40666 |
11.72 |
| 2026-02-23 00:00 |
08:17:43.07 |
-60:30:01.4 |
HIP 40666 |
11.51 |
| 2026-02-23 12:00 |
08:17:39.47 |
-60:29:42.7 |
HIP 40666 |
11.32 |
| 2026-02-24 00:00 |
08:17:35.88 |
-60:29:23.7 |
HIP 40666 |
11.16 |