メタデータ
| 項目 |
値 |
| Designation |
C/1994 J2 (Takamizawa) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1994-06-29T14:44:36.781440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:29:47Z |
| Obs used |
399 |
| NEO |
- |
| M1 |
9.500 |
| K1 |
4.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1994-12-15.0000000 |
| e |
0.99623127 |
| q (au) |
1.947740 |
| a (au) |
516.815888 |
| i (deg) |
135.961791 |
| Ω (om, deg) |
51.129192 |
| ω (w, deg) |
192.116161 |
| M (ma, deg) |
0.014126 |
等級
散乱 + 全体線形
$$
M_a = (8.389 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
8.389 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-0.500 |
| k |
0.972 |
| δ90 |
1.000 |
| 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 |
03:47:27.37 |
+13:32:21.1 |
HIP 17617 |
14.97 |
| 2026-05-12 12:00 |
03:47:29.41 |
+13:32:29.1 |
HIP 17617 |
15.48 |
| 2026-05-13 00:00 |
03:47:31.47 |
+13:32:37.0 |
HIP 17617 |
15.99 |
| 2026-05-13 12:00 |
03:47:33.52 |
+13:32:45.0 |
HIP 17617 |
16.50 |
| 2026-05-14 00:00 |
03:47:35.57 |
+13:32:52.9 |
HIP 17617 |
17.01 |
| 2026-05-14 12:00 |
03:47:37.63 |
+13:33:00.7 |
HIP 17617 |
17.53 |
| 2026-05-15 00:00 |
03:47:39.69 |
+13:33:08.6 |
HIP 17617 |
18.04 |
| 2026-05-15 12:00 |
03:47:41.75 |
+13:33:16.4 |
HIP 17617 |
18.55 |
| 2026-05-16 00:00 |
03:47:43.81 |
+13:33:24.2 |
HIP 17617 |
19.07 |
| 2026-05-16 12:00 |
03:47:45.88 |
+13:33:32.0 |
HIP 17617 |
19.58 |
| 2026-05-17 00:00 |
03:47:47.94 |
+13:33:39.7 |
HIP 17617 |
20.10 |
| 2026-05-17 12:00 |
03:47:50.00 |
+13:33:47.4 |
HIP 17617 |
20.62 |
| 2026-05-18 00:00 |
03:47:52.07 |
+13:33:55.1 |
HIP 17617 |
21.13 |
| 2026-05-18 12:00 |
03:47:54.14 |
+13:34:02.7 |
HIP 17617 |
21.65 |
| 2026-05-19 00:00 |
03:47:56.20 |
+13:34:10.4 |
HIP 17617 |
22.16 |
| 2026-05-19 12:00 |
03:47:58.27 |
+13:34:17.9 |
HIP 17617 |
22.68 |
| 2026-05-20 00:00 |
03:48:00.34 |
+13:34:25.5 |
HIP 17617 |
23.20 |
| 2026-05-20 12:00 |
03:48:02.41 |
+13:34:33.0 |
HIP 17617 |
23.71 |
| 2026-05-21 00:00 |
03:48:04.48 |
+13:34:40.5 |
HIP 17617 |
24.23 |
| 2026-05-21 12:00 |
03:48:06.54 |
+13:34:48.0 |
HIP 17617 |
24.75 |
| 2026-05-22 00:00 |
03:48:08.61 |
+13:34:55.4 |
HIP 17617 |
25.26 |
| 2026-05-22 12:00 |
03:48:10.68 |
+13:35:02.8 |
HIP 17617 |
25.78 |
| 2026-05-23 00:00 |
03:48:12.74 |
+13:35:10.2 |
HIP 17617 |
26.29 |
| 2026-05-23 12:00 |
03:48:14.81 |
+13:35:17.5 |
HIP 17617 |
26.81 |
| 2026-05-24 00:00 |
03:48:16.87 |
+13:35:24.8 |
HIP 17617 |
27.32 |
| 2026-05-24 12:00 |
03:48:18.93 |
+13:35:32.0 |
HIP 17617 |
27.84 |
| 2026-05-25 00:00 |
03:48:20.99 |
+13:35:39.3 |
HIP 17617 |
28.35 |
| 2026-05-25 12:00 |
03:48:23.05 |
+13:35:46.4 |
HIP 17617 |
28.87 |
| 2026-05-26 00:00 |
03:48:25.11 |
+13:35:53.6 |
HIP 17617 |
29.38 |
| 2026-05-26 12:00 |
03:48:27.17 |
+13:36:00.7 |
HIP 17617 |
29.89 |
| 2026-05-27 00:00 |
03:48:29.22 |
+13:36:07.8 |
HIP 17617 |
30.41 |
| 2026-05-27 12:00 |
03:48:31.28 |
+13:36:14.8 |
HIP 17617 |
30.92 |
| 2026-05-28 00:00 |
03:48:33.33 |
+13:36:21.8 |
HIP 17617 |
31.43 |
| 2026-05-28 12:00 |
03:48:35.38 |
+13:36:28.8 |
HIP 17714 |
31.90 |
| 2026-05-29 00:00 |
03:48:37.42 |
+13:36:35.7 |
HIP 17714 |
32.02 |
| 2026-05-29 12:00 |
03:48:39.46 |
+13:36:42.6 |
HIP 17714 |
32.14 |
| 2026-05-30 00:00 |
03:48:41.51 |
+13:36:49.4 |
HIP 17714 |
32.27 |
| 2026-05-30 12:00 |
03:48:43.54 |
+13:36:56.3 |
HIP 17714 |
32.41 |
| 2026-05-31 00:00 |
03:48:45.58 |
+13:37:03.0 |
HIP 17714 |
32.56 |
| 2026-05-31 12:00 |
03:48:47.61 |
+13:37:09.7 |
HIP 17714 |
32.71 |
| 2026-06-01 00:00 |
03:48:49.64 |
+13:37:16.4 |
HIP 17714 |
32.87 |
| 2026-06-01 12:00 |
03:48:51.66 |
+13:37:23.1 |
HIP 17714 |
33.04 |
| 2026-06-02 00:00 |
03:48:53.69 |
+13:37:29.7 |
HIP 17714 |
33.22 |