72P/Denning-Fujikawa
メタデータ
| 項目 |
値 |
| Designation |
72P/Denning-Fujikawa |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-07-12T06:43:54.975360Z |
| Orbit solution date (soln_date, UTC) |
2023-11-14T12:33:10Z |
| Obs used |
66 |
| NEO |
Yes |
| M1 |
17.500 |
| K1 |
19.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-09-21.0000000 |
| e |
0.82045974 |
| q (au) |
0.780529 |
| a (au) |
4.347375 |
| i (deg) |
9.232915 |
| Ω (om, deg) |
35.435635 |
| ω (w, deg) |
338.472965 |
| M (ma, deg) |
47.377307 |
等級
散乱 + 全体線形
$$
M_a = (17.746 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
17.746 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-1.000 |
| k |
0.871 |
| 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 |
12:32:32.25 |
+02:27:28.9 |
HIP 61096 |
20.90 |
| 2026-02-03 12:00 |
12:32:24.59 |
+02:28:32.2 |
HIP 61096 |
19.74 |
| 2026-02-04 00:00 |
12:32:16.80 |
+02:29:36.2 |
HIP 61096 |
18.74 |
| 2026-02-04 12:00 |
12:32:08.86 |
+02:30:40.9 |
HIP 61096 |
17.95 |
| 2026-02-05 00:00 |
12:32:00.79 |
+02:31:46.4 |
HIP 61096 |
17.41 |
| 2026-02-05 12:00 |
12:31:52.59 |
+02:32:52.6 |
HIP 61096 |
17.15 |
| 2026-02-06 00:00 |
12:31:44.24 |
+02:33:59.5 |
HIP 61096 |
17.20 |
| 2026-02-06 12:00 |
12:31:35.77 |
+02:35:07.1 |
HIP 61096 |
17.58 |
| 2026-02-07 00:00 |
12:31:27.16 |
+02:36:15.5 |
HIP 61096 |
18.27 |
| 2026-02-07 12:00 |
12:31:18.41 |
+02:37:24.5 |
HIP 61096 |
19.26 |
| 2026-02-08 00:00 |
12:31:09.54 |
+02:38:34.3 |
HIP 61096 |
20.51 |
| 2026-02-08 12:00 |
12:31:00.53 |
+02:39:44.7 |
HIP 61096 |
22.00 |
| 2026-02-09 00:00 |
12:30:51.39 |
+02:40:55.8 |
HIP 61096 |
23.69 |
| 2026-02-09 12:00 |
12:30:42.12 |
+02:42:07.6 |
HIP 61096 |
25.54 |
| 2026-02-10 00:00 |
12:30:32.72 |
+02:43:20.1 |
HIP 61096 |
27.54 |
| 2026-02-10 12:00 |
12:30:23.19 |
+02:44:33.2 |
HIP 61096 |
29.67 |
| 2026-02-11 00:00 |
12:30:13.54 |
+02:45:47.0 |
HIP 61096 |
31.90 |
| 2026-02-11 12:00 |
12:30:03.75 |
+02:47:01.4 |
HIP 61096 |
34.23 |
| 2026-02-12 00:00 |
12:29:53.85 |
+02:48:16.5 |
HIP 61096 |
36.64 |
| 2026-02-12 12:00 |
12:29:43.81 |
+02:49:32.1 |
HIP 60847 |
34.38 |
| 2026-02-13 00:00 |
12:29:33.65 |
+02:50:48.4 |
HIP 60847 |
31.81 |
| 2026-02-13 12:00 |
12:29:23.37 |
+02:52:05.3 |
HIP 60847 |
29.28 |
| 2026-02-14 00:00 |
12:29:12.97 |
+02:53:22.8 |
HIP 60847 |
26.78 |
| 2026-02-14 12:00 |
12:29:02.44 |
+02:54:40.9 |
HIP 60847 |
24.35 |
| 2026-02-15 00:00 |
12:28:51.79 |
+02:55:59.6 |
HIP 60847 |
22.03 |
| 2026-02-15 12:00 |
12:28:41.03 |
+02:57:18.8 |
HIP 60847 |
19.85 |
| 2026-02-16 00:00 |
12:28:30.15 |
+02:58:38.6 |
HIP 60847 |
17.90 |
| 2026-02-16 12:00 |
12:28:19.15 |
+02:59:58.9 |
HIP 60847 |
16.28 |
| 2026-02-17 00:00 |
12:28:08.03 |
+03:01:19.8 |
HIP 60847 |
15.09 |
| 2026-02-17 12:00 |
12:27:56.80 |
+03:02:41.2 |
HIP 60847 |
14.48 |
| 2026-02-18 00:00 |
12:27:45.46 |
+03:04:03.1 |
HIP 60847 |
14.54 |
| 2026-02-18 12:00 |
12:27:34.01 |
+03:05:25.5 |
HIP 60847 |
15.27 |
| 2026-02-19 00:00 |
12:27:22.44 |
+03:06:48.4 |
HIP 60847 |
16.60 |
| 2026-02-19 12:00 |
12:27:10.77 |
+03:08:11.8 |
HIP 60847 |
18.42 |
| 2026-02-20 00:00 |
12:26:58.99 |
+03:09:35.7 |
HIP 60847 |
20.61 |
| 2026-02-20 12:00 |
12:26:47.10 |
+03:11:00.0 |
HIP 60612 |
22.61 |
| 2026-02-21 00:00 |
12:26:35.11 |
+03:12:24.8 |
HIP 60612 |
20.46 |
| 2026-02-21 12:00 |
12:26:23.01 |
+03:13:50.0 |
HIP 60612 |
18.63 |
| 2026-02-22 00:00 |
12:26:10.82 |
+03:15:15.6 |
HIP 60612 |
17.26 |
| 2026-02-22 12:00 |
12:25:58.52 |
+03:16:41.7 |
HIP 60612 |
16.45 |
| 2026-02-23 00:00 |
12:25:46.12 |
+03:18:08.1 |
HIP 60612 |
16.32 |
| 2026-02-23 12:00 |
12:25:33.63 |
+03:19:34.9 |
HIP 60612 |
16.90 |
| 2026-02-24 00:00 |
12:25:21.03 |
+03:21:02.2 |
HIP 60612 |
18.13 |