メタデータ
| 項目 |
値 |
| Designation |
403P/CATALINA |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-09-15T08:40:13.650240Z |
| Orbit solution date (soln_date, UTC) |
2021-05-02T23:43:05Z |
| Obs used |
215 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
23.500 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2020-10-15T10:46:13.209600Z |
| Discovery magnitude (MPC) |
19.79 G |
| Discovery observatory (MPC) |
G96 · Mt. Lemmon Survey |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2015-02-13.0000000 |
| e |
0.50365776 |
| q (au) |
2.684426 |
| a (au) |
5.408417 |
| i (deg) |
12.323320 |
| Ω (om, deg) |
163.851340 |
| ω (w, deg) |
277.851227 |
| M (ma, deg) |
200.037302 |
等級
散乱 + 全体線形
$$
M_a = (12.145 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.145 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-0.540 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
17:10:05.59 |
-09:01:21.3 |
HIP 84098 |
25.08 |
| 2026-05-12 12:00 |
17:09:55.20 |
-09:00:42.2 |
HIP 84098 |
27.05 |
| 2026-05-13 00:00 |
17:09:44.74 |
-09:00:03.4 |
HIP 83977 |
28.85 |
| 2026-05-13 12:00 |
17:09:34.20 |
-08:59:24.9 |
HIP 83977 |
28.68 |
| 2026-05-14 00:00 |
17:09:23.60 |
-08:58:46.8 |
HIP 83977 |
28.77 |
| 2026-05-14 12:00 |
17:09:12.93 |
-08:58:08.9 |
HIP 83977 |
29.12 |
| 2026-05-15 00:00 |
17:09:02.18 |
-08:57:31.4 |
HIP 83977 |
29.73 |
| 2026-05-15 12:00 |
17:08:51.38 |
-08:56:54.3 |
HIP 83977 |
30.59 |
| 2026-05-16 00:00 |
17:08:40.50 |
-08:56:17.4 |
HIP 83977 |
31.67 |
| 2026-05-16 12:00 |
17:08:29.57 |
-08:55:40.9 |
HIP 83977 |
32.97 |
| 2026-05-17 00:00 |
17:08:18.57 |
-08:55:04.8 |
HIP 83977 |
34.45 |
| 2026-05-17 12:00 |
17:08:07.50 |
-08:54:29.0 |
HIP 83977 |
36.11 |
| 2026-05-18 00:00 |
17:07:56.38 |
-08:53:53.6 |
HIP 83977 |
37.91 |
| 2026-05-18 12:00 |
17:07:45.20 |
-08:53:18.5 |
HIP 83977 |
39.85 |
| 2026-05-19 00:00 |
17:07:33.97 |
-08:52:43.8 |
HIP 83977 |
41.90 |
| 2026-05-19 12:00 |
17:07:22.68 |
-08:52:09.4 |
HIP 83977 |
44.06 |
| 2026-05-20 00:00 |
17:07:11.34 |
-08:51:35.5 |
HIP 83977 |
46.30 |
| 2026-05-20 12:00 |
17:06:59.94 |
-08:51:01.9 |
HIP 83977 |
48.63 |
| 2026-05-21 00:00 |
17:06:48.49 |
-08:50:28.7 |
HIP 83977 |
51.02 |
| 2026-05-21 12:00 |
17:06:37.00 |
-08:49:55.9 |
HIP 83440 |
51.46 |
| 2026-05-22 00:00 |
17:06:25.45 |
-08:49:23.4 |
HIP 83440 |
48.81 |
| 2026-05-22 12:00 |
17:06:13.86 |
-08:48:51.4 |
HIP 83440 |
46.17 |
| 2026-05-23 00:00 |
17:06:02.23 |
-08:48:19.7 |
HIP 83440 |
43.56 |
| 2026-05-23 12:00 |
17:05:50.55 |
-08:47:48.5 |
HIP 83440 |
40.98 |
| 2026-05-24 00:00 |
17:05:38.83 |
-08:47:17.6 |
HIP 83440 |
38.43 |
| 2026-05-24 12:00 |
17:05:27.07 |
-08:46:47.1 |
HIP 83440 |
35.93 |
| 2026-05-25 00:00 |
17:05:15.27 |
-08:46:17.1 |
HIP 83440 |
33.50 |
| 2026-05-25 12:00 |
17:05:03.43 |
-08:45:47.4 |
HIP 83440 |
31.14 |
| 2026-05-26 00:00 |
17:04:51.56 |
-08:45:18.2 |
HIP 83440 |
28.88 |
| 2026-05-26 12:00 |
17:04:39.65 |
-08:44:49.4 |
HIP 83440 |
26.76 |
| 2026-05-27 00:00 |
17:04:27.71 |
-08:44:21.0 |
HIP 83440 |
24.79 |
| 2026-05-27 12:00 |
17:04:15.74 |
-08:43:53.0 |
HIP 83440 |
23.04 |
| 2026-05-28 00:00 |
17:04:03.74 |
-08:43:25.5 |
HIP 83440 |
21.55 |
| 2026-05-28 12:00 |
17:03:51.71 |
-08:42:58.4 |
HIP 83440 |
20.39 |
| 2026-05-29 00:00 |
17:03:39.65 |
-08:42:31.7 |
HIP 83440 |
19.62 |
| 2026-05-29 12:00 |
17:03:27.56 |
-08:42:05.4 |
HIP 83440 |
19.28 |
| 2026-05-30 00:00 |
17:03:15.45 |
-08:41:39.6 |
HIP 83440 |
19.40 |
| 2026-05-30 12:00 |
17:03:03.32 |
-08:41:14.2 |
HIP 83440 |
19.98 |
| 2026-05-31 00:00 |
17:02:51.17 |
-08:40:49.3 |
HIP 83440 |
20.98 |
| 2026-05-31 12:00 |
17:02:38.99 |
-08:40:24.7 |
HIP 83440 |
22.34 |
| 2026-06-01 00:00 |
17:02:26.80 |
-08:40:00.7 |
HIP 83440 |
24.01 |
| 2026-06-01 12:00 |
17:02:14.59 |
-08:39:37.1 |
HIP 83440 |
25.92 |
| 2026-06-02 00:00 |
17:02:02.36 |
-08:39:13.9 |
HIP 83440 |
28.03 |