メタデータ
| 項目 |
値 |
| Designation |
C/2004 DZ61 (Catalina-LINEAR) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-05-26T20:35:08.787840Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:38Z |
| Obs used |
344 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
4.500 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2004-03-21.0000000 |
| e |
0.95602635 |
| q (au) |
2.013330 |
| a (au) |
45.784923 |
| i (deg) |
66.809283 |
| Ω (om, deg) |
172.791834 |
| ω (w, deg) |
44.462016 |
| M (ma, deg) |
359.787298 |
等級
散乱 + 全体線形
$$
M_a = (13.877 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.877 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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) |
| 2026-09-20 00:00 |
00:48:43.20 |
-19:32:10.3 |
HIP 3646 |
38.14 |
| 2026-09-20 12:00 |
00:48:40.34 |
-19:32:33.4 |
HIP 3646 |
37.38 |
| 2026-09-21 00:00 |
00:48:37.47 |
-19:32:56.3 |
HIP 3646 |
36.62 |
| 2026-09-21 12:00 |
00:48:34.59 |
-19:33:19.0 |
HIP 3646 |
35.87 |
| 2026-09-22 00:00 |
00:48:31.71 |
-19:33:41.7 |
HIP 3646 |
35.11 |
| 2026-09-22 12:00 |
00:48:28.82 |
-19:34:04.2 |
HIP 3646 |
34.35 |
| 2026-09-23 00:00 |
00:48:25.93 |
-19:34:26.5 |
HIP 3646 |
33.60 |
| 2026-09-23 12:00 |
00:48:23.03 |
-19:34:48.8 |
HIP 3646 |
32.85 |
| 2026-09-24 00:00 |
00:48:20.12 |
-19:35:10.8 |
HIP 3646 |
32.10 |
| 2026-09-24 12:00 |
00:48:17.21 |
-19:35:32.8 |
HIP 3646 |
31.35 |
| 2026-09-25 00:00 |
00:48:14.29 |
-19:35:54.6 |
HIP 3646 |
30.61 |
| 2026-09-25 12:00 |
00:48:11.37 |
-19:36:16.3 |
HIP 3646 |
29.86 |
| 2026-09-26 00:00 |
00:48:08.44 |
-19:36:37.8 |
HIP 3646 |
29.12 |
| 2026-09-26 12:00 |
00:48:05.51 |
-19:36:59.1 |
HIP 3646 |
28.39 |
| 2026-09-27 00:00 |
00:48:02.57 |
-19:37:20.4 |
HIP 3646 |
27.65 |
| 2026-09-27 12:00 |
00:47:59.63 |
-19:37:41.5 |
HIP 3646 |
26.92 |
| 2026-09-28 00:00 |
00:47:56.68 |
-19:38:02.4 |
HIP 3646 |
26.19 |
| 2026-09-28 12:00 |
00:47:53.73 |
-19:38:23.2 |
HIP 3646 |
25.47 |
| 2026-09-29 00:00 |
00:47:50.78 |
-19:38:43.8 |
HIP 3646 |
24.75 |
| 2026-09-29 12:00 |
00:47:47.82 |
-19:39:04.2 |
HIP 3646 |
24.04 |
| 2026-09-30 00:00 |
00:47:44.86 |
-19:39:24.5 |
HIP 3646 |
23.33 |
| 2026-09-30 12:00 |
00:47:41.90 |
-19:39:44.7 |
HIP 3646 |
22.63 |
| 2026-10-01 00:00 |
00:47:38.93 |
-19:40:04.7 |
HIP 3646 |
21.93 |
| 2026-10-01 12:00 |
00:47:35.96 |
-19:40:24.5 |
HIP 3646 |
21.25 |
| 2026-10-02 00:00 |
00:47:32.99 |
-19:40:44.2 |
HIP 3646 |
20.57 |
| 2026-10-02 12:00 |
00:47:30.02 |
-19:41:03.7 |
HIP 3646 |
19.89 |
| 2026-10-03 00:00 |
00:47:27.05 |
-19:41:23.0 |
HIP 3646 |
19.23 |
| 2026-10-03 12:00 |
00:47:24.07 |
-19:41:42.2 |
HIP 3646 |
18.58 |
| 2026-10-04 00:00 |
00:47:21.09 |
-19:42:01.2 |
HIP 3646 |
17.94 |
| 2026-10-04 12:00 |
00:47:18.11 |
-19:42:20.0 |
HIP 3646 |
17.32 |
| 2026-10-05 00:00 |
00:47:15.13 |
-19:42:38.7 |
HIP 3646 |
16.70 |
| 2026-10-05 12:00 |
00:47:12.15 |
-19:42:57.2 |
HIP 3646 |
16.11 |
| 2026-10-06 00:00 |
00:47:09.17 |
-19:43:15.5 |
HIP 3646 |
15.53 |
| 2026-10-06 12:00 |
00:47:06.19 |
-19:43:33.6 |
HIP 3646 |
14.97 |
| 2026-10-07 00:00 |
00:47:03.21 |
-19:43:51.6 |
HIP 3646 |
14.43 |
| 2026-10-07 12:00 |
00:47:00.23 |
-19:44:09.3 |
HIP 3646 |
13.91 |
| 2026-10-08 00:00 |
00:46:57.25 |
-19:44:26.9 |
HIP 3646 |
13.42 |
| 2026-10-08 12:00 |
00:46:54.28 |
-19:44:44.4 |
HIP 3646 |
12.96 |
| 2026-10-09 00:00 |
00:46:51.30 |
-19:45:01.6 |
HIP 3646 |
12.54 |
| 2026-10-09 12:00 |
00:46:48.32 |
-19:45:18.6 |
HIP 3646 |
12.15 |
| 2026-10-10 00:00 |
00:46:45.35 |
-19:45:35.5 |
HIP 3646 |
11.79 |
| 2026-10-10 12:00 |
00:46:42.38 |
-19:45:52.1 |
HIP 3646 |
11.48 |
| 2026-10-11 00:00 |
00:46:39.41 |
-19:46:08.6 |
HIP 3646 |
11.21 |