メタデータ
| 項目 |
値 |
| Designation |
C/2006 V1 (Catalina) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-11-26T12:34:51.493440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:01Z |
| Obs used |
684 |
| NEO |
- |
| M1 |
9.300 |
| K1 |
9.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2007-04-27.0000000 |
| e |
0.98961648 |
| q (au) |
2.674903 |
| a (au) |
257.610414 |
| i (deg) |
31.119474 |
| Ω (om, deg) |
335.724230 |
| ω (w, deg) |
253.403550 |
| M (ma, deg) |
359.949101 |
等級
散乱 + 全体線形
$$
M_a = (9.399 + 2.907\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
9.399 |
| n |
2.907 |
| gf |
1.000 |
| gb |
-0.949 |
| 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 |
00:19:17.36 |
+25:41:17.3 |
HIP 1695 |
27.09 |
| 2026-09-20 12:00 |
00:19:14.15 |
+25:41:04.2 |
HIP 1695 |
27.81 |
| 2026-09-21 00:00 |
00:19:10.93 |
+25:40:50.8 |
HIP 1695 |
28.54 |
| 2026-09-21 12:00 |
00:19:07.71 |
+25:40:37.3 |
HIP 1488 |
29.03 |
| 2026-09-22 00:00 |
00:19:04.49 |
+25:40:23.5 |
HIP 1488 |
29.05 |
| 2026-09-22 12:00 |
00:19:01.26 |
+25:40:09.6 |
HIP 1488 |
29.09 |
| 2026-09-23 00:00 |
00:18:58.03 |
+25:39:55.5 |
HIP 1488 |
29.16 |
| 2026-09-23 12:00 |
00:18:54.80 |
+25:39:41.2 |
HIP 1488 |
29.25 |
| 2026-09-24 00:00 |
00:18:51.57 |
+25:39:26.7 |
HIP 1488 |
29.36 |
| 2026-09-24 12:00 |
00:18:48.33 |
+25:39:12.0 |
HIP 1488 |
29.49 |
| 2026-09-25 00:00 |
00:18:45.09 |
+25:38:57.1 |
HIP 1488 |
29.65 |
| 2026-09-25 12:00 |
00:18:41.85 |
+25:38:42.1 |
HIP 1488 |
29.83 |
| 2026-09-26 00:00 |
00:18:38.61 |
+25:38:26.9 |
HIP 1488 |
30.03 |
| 2026-09-26 12:00 |
00:18:35.37 |
+25:38:11.5 |
HIP 1488 |
30.25 |
| 2026-09-27 00:00 |
00:18:32.13 |
+25:37:55.9 |
HIP 1488 |
30.49 |
| 2026-09-27 12:00 |
00:18:28.89 |
+25:37:40.1 |
HIP 1488 |
30.76 |
| 2026-09-28 00:00 |
00:18:25.65 |
+25:37:24.1 |
HIP 1488 |
31.04 |
| 2026-09-28 12:00 |
00:18:22.40 |
+25:37:08.0 |
HIP 1488 |
31.34 |
| 2026-09-29 00:00 |
00:18:19.16 |
+25:36:51.7 |
HIP 1488 |
31.66 |
| 2026-09-29 12:00 |
00:18:15.92 |
+25:36:35.2 |
HIP 1488 |
32.01 |
| 2026-09-30 00:00 |
00:18:12.68 |
+25:36:18.6 |
HIP 1488 |
32.36 |
| 2026-09-30 12:00 |
00:18:09.44 |
+25:36:01.7 |
HIP 1488 |
32.74 |
| 2026-10-01 00:00 |
00:18:06.20 |
+25:35:44.7 |
HIP 1488 |
33.13 |
| 2026-10-01 12:00 |
00:18:02.96 |
+25:35:27.6 |
HIP 1488 |
33.54 |
| 2026-10-02 00:00 |
00:17:59.73 |
+25:35:10.2 |
HIP 1488 |
33.97 |
| 2026-10-02 12:00 |
00:17:56.49 |
+25:34:52.7 |
HIP 1488 |
34.41 |
| 2026-10-03 00:00 |
00:17:53.26 |
+25:34:35.1 |
HIP 1488 |
34.86 |
| 2026-10-03 12:00 |
00:17:50.04 |
+25:34:17.2 |
HIP 1488 |
35.33 |
| 2026-10-04 00:00 |
00:17:46.81 |
+25:33:59.3 |
HIP 1488 |
35.82 |
| 2026-10-04 12:00 |
00:17:43.59 |
+25:33:41.1 |
HIP 1488 |
36.31 |
| 2026-10-05 00:00 |
00:17:40.37 |
+25:33:22.8 |
HIP 1488 |
36.82 |
| 2026-10-05 12:00 |
00:17:37.16 |
+25:33:04.3 |
HIP 1488 |
37.34 |
| 2026-10-06 00:00 |
00:17:33.94 |
+25:32:45.7 |
HIP 1488 |
37.87 |
| 2026-10-06 12:00 |
00:17:30.74 |
+25:32:26.9 |
HIP 1488 |
38.41 |
| 2026-10-07 00:00 |
00:17:27.54 |
+25:32:08.0 |
HIP 1488 |
38.96 |
| 2026-10-07 12:00 |
00:17:24.34 |
+25:31:48.9 |
HIP 1488 |
39.53 |
| 2026-10-08 00:00 |
00:17:21.15 |
+25:31:29.6 |
HIP 1488 |
40.10 |
| 2026-10-08 12:00 |
00:17:17.96 |
+25:31:10.3 |
HIP 1488 |
40.68 |
| 2026-10-09 00:00 |
00:17:14.78 |
+25:30:50.7 |
HIP 1488 |
41.27 |
| 2026-10-09 12:00 |
00:17:11.61 |
+25:30:31.1 |
HIP 1488 |
41.87 |
| 2026-10-10 00:00 |
00:17:08.44 |
+25:30:11.2 |
HIP 1488 |
42.47 |
| 2026-10-10 12:00 |
00:17:05.28 |
+25:29:51.3 |
HIP 1488 |
43.08 |
| 2026-10-11 00:00 |
00:17:02.12 |
+25:29:31.2 |
HIP 1110 |
43.59 |