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) |
| 2026-03-26 00:00 |
00:45:29.20 |
-18:23:44.8 |
HIP 3663 |
20.51 |
| 2026-03-26 12:00 |
00:45:32.30 |
-18:23:27.5 |
HIP 3663 |
19.72 |
| 2026-03-27 00:00 |
00:45:35.39 |
-18:23:10.3 |
HIP 3663 |
18.94 |
| 2026-03-27 12:00 |
00:45:38.50 |
-18:22:53.2 |
HIP 3663 |
18.15 |
| 2026-03-28 00:00 |
00:45:41.60 |
-18:22:36.3 |
HIP 3663 |
17.37 |
| 2026-03-28 12:00 |
00:45:44.71 |
-18:22:19.6 |
HIP 3663 |
16.58 |
| 2026-03-29 00:00 |
00:45:47.81 |
-18:22:02.9 |
HIP 3663 |
15.80 |
| 2026-03-29 12:00 |
00:45:50.92 |
-18:21:46.5 |
HIP 3663 |
15.01 |
| 2026-03-30 00:00 |
00:45:54.03 |
-18:21:30.1 |
HIP 3663 |
14.23 |
| 2026-03-30 12:00 |
00:45:57.14 |
-18:21:13.9 |
HIP 3663 |
13.45 |
| 2026-03-31 00:00 |
00:46:00.26 |
-18:20:57.9 |
HIP 3663 |
12.67 |
| 2026-03-31 12:00 |
00:46:03.37 |
-18:20:42.0 |
HIP 3663 |
11.89 |
| 2026-04-01 00:00 |
00:46:06.48 |
-18:20:26.3 |
HIP 3663 |
11.11 |
| 2026-04-01 12:00 |
00:46:09.60 |
-18:20:10.7 |
HIP 3663 |
10.33 |
| 2026-04-02 00:00 |
00:46:12.71 |
-18:19:55.2 |
HIP 3663 |
9.55 |
| 2026-04-02 12:00 |
00:46:15.83 |
-18:19:40.0 |
HIP 3663 |
8.78 |
| 2026-04-03 00:00 |
00:46:18.94 |
-18:19:24.8 |
HIP 3663 |
8.00 |
| 2026-04-03 12:00 |
00:46:22.06 |
-18:19:09.8 |
HIP 3663 |
7.23 |
| 2026-04-04 00:00 |
00:46:25.17 |
-18:18:55.0 |
HIP 3663 |
6.46 |
| 2026-04-04 12:00 |
00:46:28.29 |
-18:18:40.3 |
HIP 3663 |
5.69 |
| 2026-04-05 00:00 |
00:46:31.40 |
-18:18:25.8 |
HIP 3663 |
4.93 |
| 2026-04-05 12:00 |
00:46:34.51 |
-18:18:11.4 |
HIP 3663 |
4.18 |
| 2026-04-06 00:00 |
00:46:37.62 |
-18:17:57.2 |
HIP 3663 |
3.43 |
| 2026-04-06 12:00 |
00:46:40.73 |
-18:17:43.2 |
HIP 3663 |
2.70 |
| 2026-04-07 00:00 |
00:46:43.84 |
-18:17:29.3 |
HIP 3663 |
2.00 |
| 2026-04-07 12:00 |
00:46:46.94 |
-18:17:15.6 |
HIP 3663 |
1.38 |
| 2026-04-08 00:00 |
00:46:50.05 |
-18:17:02.1 |
HIP 3663 |
1.01 |
| 2026-04-08 12:00 |
00:46:53.15 |
-18:16:48.7 |
HIP 3663 |
1.14 |
| 2026-04-09 00:00 |
00:46:56.25 |
-18:16:35.4 |
HIP 3663 |
1.66 |
| 2026-04-09 12:00 |
00:46:59.34 |
-18:16:22.4 |
HIP 3663 |
2.32 |
| 2026-04-10 00:00 |
00:47:02.44 |
-18:16:09.5 |
HIP 3663 |
3.03 |
| 2026-04-10 12:00 |
00:47:05.53 |
-18:15:56.8 |
HIP 3663 |
3.76 |
| 2026-04-11 00:00 |
00:47:08.61 |
-18:15:44.2 |
HIP 3663 |
4.49 |
| 2026-04-11 12:00 |
00:47:11.70 |
-18:15:31.8 |
HIP 3663 |
5.24 |
| 2026-04-12 00:00 |
00:47:14.78 |
-18:15:19.6 |
HIP 3663 |
5.98 |
| 2026-04-12 12:00 |
00:47:17.85 |
-18:15:07.6 |
HIP 3663 |
6.73 |
| 2026-04-13 00:00 |
00:47:20.93 |
-18:14:55.7 |
HIP 3663 |
7.48 |
| 2026-04-13 12:00 |
00:47:23.99 |
-18:14:44.0 |
HIP 3663 |
8.22 |
| 2026-04-14 00:00 |
00:47:27.06 |
-18:14:32.5 |
HIP 3663 |
8.97 |
| 2026-04-14 12:00 |
00:47:30.12 |
-18:14:21.2 |
HIP 3663 |
9.71 |
| 2026-04-15 00:00 |
00:47:33.17 |
-18:14:10.0 |
HIP 3663 |
10.45 |
| 2026-04-15 12:00 |
00:47:36.22 |
-18:13:59.0 |
HIP 3717 |
10.43 |
| 2026-04-16 00:00 |
00:47:39.26 |
-18:13:48.2 |
HIP 3717 |
10.16 |