75D/Kohoutek
メタデータ
| 項目 |
値 |
| Designation |
75D/Kohoutek |
| Type |
D |
| Perihelion (tp_cal, UTC) |
1994-06-29T21:33:48.680640Z |
| Orbit solution date (soln_date, UTC) |
2000-09-07T10:28:10Z |
| Obs used |
81 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
10.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1994-06-17.0000000 |
| e |
0.49630740 |
| q (au) |
1.784657 |
| a (au) |
3.543147 |
| i (deg) |
5.907209 |
| Ω (om, deg) |
269.686095 |
| ω (w, deg) |
175.801725 |
| M (ma, deg) |
358.093842 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
20:24:27.16 |
-16:35:17.9 |
HIP 100730 |
18.23 |
| 2026-02-03 12:00 |
20:24:57.71 |
-16:33:19.1 |
HIP 100730 |
12.42 |
| 2026-02-04 00:00 |
20:25:28.26 |
-16:31:20.0 |
HIP 100730 |
9.55 |
| 2026-02-04 12:00 |
20:25:58.79 |
-16:29:20.4 |
HIP 100730 |
11.96 |
| 2026-02-05 00:00 |
20:26:29.31 |
-16:27:20.3 |
HIP 100730 |
17.61 |
| 2026-02-05 12:00 |
20:26:59.81 |
-16:25:19.9 |
HIP 100730 |
24.33 |
| 2026-02-06 00:00 |
20:27:30.30 |
-16:23:19.1 |
HIP 100855 |
29.88 |
| 2026-02-06 12:00 |
20:28:00.77 |
-16:21:17.8 |
HIP 100855 |
30.79 |
| 2026-02-07 00:00 |
20:28:31.23 |
-16:19:16.1 |
HIP 100855 |
33.45 |
| 2026-02-07 12:00 |
20:29:01.67 |
-16:17:14.1 |
HIP 101190 |
28.32 |
| 2026-02-08 00:00 |
20:29:32.09 |
-16:15:11.6 |
HIP 101190 |
24.11 |
| 2026-02-08 12:00 |
20:30:02.50 |
-16:13:08.8 |
HIP 101190 |
21.80 |
| 2026-02-09 00:00 |
20:30:32.88 |
-16:11:05.5 |
HIP 101190 |
22.01 |
| 2026-02-09 12:00 |
20:31:03.25 |
-16:09:01.9 |
HIP 101199 |
23.11 |
| 2026-02-10 00:00 |
20:31:33.60 |
-16:06:57.8 |
HIP 101409 |
22.56 |
| 2026-02-10 12:00 |
20:32:03.92 |
-16:04:53.4 |
HIP 101409 |
15.00 |
| 2026-02-11 00:00 |
20:32:34.23 |
-16:02:48.6 |
HIP 101409 |
7.45 |
| 2026-02-11 12:00 |
20:33:04.51 |
-16:00:43.4 |
HIP 101409 |
0.84 |
| 2026-02-12 00:00 |
20:33:34.76 |
-15:58:37.8 |
HIP 101409 |
7.78 |
| 2026-02-12 12:00 |
20:34:05.00 |
-15:56:31.9 |
HIP 101555 |
13.88 |
| 2026-02-13 00:00 |
20:34:35.21 |
-15:54:25.6 |
HIP 101555 |
7.48 |
| 2026-02-13 12:00 |
20:35:05.39 |
-15:52:18.9 |
HIP 101555 |
5.81 |
| 2026-02-14 00:00 |
20:35:35.55 |
-15:50:11.9 |
HIP 101555 |
11.21 |
| 2026-02-14 12:00 |
20:36:05.68 |
-15:48:04.5 |
HIP 101555 |
18.21 |
| 2026-02-15 00:00 |
20:36:35.78 |
-15:45:56.8 |
HIP 101555 |
25.52 |
| 2026-02-15 12:00 |
20:37:05.86 |
-15:43:48.7 |
HIP 101649 |
27.61 |
| 2026-02-16 00:00 |
20:37:35.90 |
-15:41:40.2 |
HIP 101649 |
29.62 |
| 2026-02-16 12:00 |
20:38:05.92 |
-15:39:31.4 |
HIP 101751 |
32.53 |
| 2026-02-17 00:00 |
20:38:35.90 |
-15:37:22.3 |
HIP 101999 |
27.62 |
| 2026-02-17 12:00 |
20:39:05.85 |
-15:35:12.8 |
HIP 101999 |
20.49 |
| 2026-02-18 00:00 |
20:39:35.77 |
-15:33:03.0 |
HIP 101999 |
13.78 |
| 2026-02-18 12:00 |
20:40:05.66 |
-15:30:52.9 |
HIP 101999 |
8.55 |
| 2026-02-19 00:00 |
20:40:35.51 |
-15:28:42.4 |
HIP 101999 |
8.32 |
| 2026-02-19 12:00 |
20:41:05.33 |
-15:26:31.6 |
HIP 101999 |
13.35 |
| 2026-02-20 00:00 |
20:41:35.11 |
-15:24:20.6 |
HIP 101999 |
19.99 |
| 2026-02-20 12:00 |
20:42:04.86 |
-15:22:09.2 |
HIP 102213 |
19.88 |
| 2026-02-21 00:00 |
20:42:34.57 |
-15:19:57.4 |
HIP 102289 |
16.79 |
| 2026-02-21 12:00 |
20:43:04.24 |
-15:17:45.4 |
HIP 102289 |
9.71 |
| 2026-02-22 00:00 |
20:43:33.87 |
-15:15:33.1 |
HIP 102289 |
4.31 |
| 2026-02-22 12:00 |
20:44:03.46 |
-15:13:20.5 |
HIP 102289 |
7.40 |
| 2026-02-23 00:00 |
20:44:33.02 |
-15:11:07.6 |
HIP 102289 |
14.23 |
| 2026-02-23 12:00 |
20:45:02.53 |
-15:08:54.4 |
HIP 102433 |
8.43 |
| 2026-02-24 00:00 |
20:45:32.00 |
-15:06:40.9 |
HIP 102433 |
5.08 |