メタデータ
| 項目 |
値 |
| Designation |
459P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-28T11:56:49.721280Z |
| Orbit solution date (soln_date, UTC) |
2026-09-04T08:42:17Z |
| Obs used |
1065 |
| NEO |
- |
| M1 |
17.200 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2010-10-08T10:01:56.064000Z |
| Discovery magnitude (MPC) |
20.10 V |
| Discovery observatory (MPC) |
691 · Steward Observatory, Kitt Peak-Spacewatch |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2018-12-31.0000000 |
| e |
0.52265290 |
| q (au) |
1.599854 |
| a (au) |
3.351553 |
| i (deg) |
13.717695 |
| Ω (om, deg) |
272.031261 |
| ω (w, deg) |
189.887894 |
| M (ma, deg) |
112.684469 |
等級
散乱 + 全体線形
$$
M_a = (15.932 + 2.395\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.932 |
| n |
2.395 |
| gf |
1.000 |
| gb |
-0.887 |
| k |
0.999 |
| 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
ファインディングチャート
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-25 00:00 |
19:00:38.80 |
-17:50:08.6 |
HIP 93319 |
21.31 |
| 2026-09-25 12:00 |
19:00:40.82 |
-17:50:24.1 |
HIP 93319 |
21.65 |
| 2026-09-26 00:00 |
19:00:43.06 |
-17:50:39.4 |
HIP 93319 |
21.99 |
| 2026-09-26 12:00 |
19:00:45.51 |
-17:50:54.3 |
HIP 93319 |
22.35 |
| 2026-09-27 00:00 |
19:00:48.17 |
-17:51:08.9 |
HIP 93319 |
22.73 |
| 2026-09-27 12:00 |
19:00:51.05 |
-17:51:23.2 |
HIP 93319 |
23.13 |
| 2026-09-28 00:00 |
19:00:54.14 |
-17:51:37.1 |
HIP 93319 |
23.56 |
| 2026-09-28 12:00 |
19:00:57.44 |
-17:51:50.7 |
HIP 93319 |
24.01 |
| 2026-09-29 00:00 |
19:01:00.96 |
-17:52:04.0 |
HIP 93319 |
24.49 |
| 2026-09-29 12:00 |
19:01:04.68 |
-17:52:17.0 |
HIP 93319 |
25.01 |
| 2026-09-30 00:00 |
19:01:08.62 |
-17:52:29.6 |
HIP 93319 |
25.57 |
| 2026-09-30 12:00 |
19:01:12.76 |
-17:52:41.8 |
HIP 93319 |
26.17 |
| 2026-10-01 00:00 |
19:01:17.12 |
-17:52:53.8 |
HIP 93319 |
26.80 |
| 2026-10-01 12:00 |
19:01:21.68 |
-17:53:05.4 |
HIP 93319 |
27.49 |
| 2026-10-02 00:00 |
19:01:26.45 |
-17:53:16.6 |
HIP 93319 |
28.22 |
| 2026-10-02 12:00 |
19:01:31.43 |
-17:53:27.5 |
HIP 93319 |
29.00 |
| 2026-10-03 00:00 |
19:01:36.62 |
-17:53:38.1 |
HIP 93319 |
29.83 |
| 2026-10-03 12:00 |
19:01:42.01 |
-17:53:48.3 |
HIP 93319 |
30.71 |
| 2026-10-04 00:00 |
19:01:47.61 |
-17:53:58.1 |
HIP 93319 |
31.65 |
| 2026-10-04 12:00 |
19:01:53.42 |
-17:54:07.6 |
HIP 93319 |
32.64 |
| 2026-10-05 00:00 |
19:01:59.43 |
-17:54:16.7 |
HIP 93644 |
31.96 |
| 2026-10-05 12:00 |
19:02:05.64 |
-17:54:25.5 |
HIP 93644 |
30.58 |
| 2026-10-06 00:00 |
19:02:12.06 |
-17:54:33.9 |
HIP 93644 |
29.16 |
| 2026-10-06 12:00 |
19:02:18.68 |
-17:54:41.9 |
HIP 93644 |
27.71 |
| 2026-10-07 00:00 |
19:02:25.50 |
-17:54:49.6 |
HIP 93644 |
26.22 |
| 2026-10-07 12:00 |
19:02:32.52 |
-17:54:56.9 |
HIP 93644 |
24.71 |
| 2026-10-08 00:00 |
19:02:39.74 |
-17:55:03.8 |
HIP 93644 |
23.17 |
| 2026-10-08 12:00 |
19:02:47.17 |
-17:55:10.3 |
HIP 93644 |
21.62 |
| 2026-10-09 00:00 |
19:02:54.79 |
-17:55:16.5 |
HIP 93644 |
20.06 |
| 2026-10-09 12:00 |
19:03:02.61 |
-17:55:22.3 |
HIP 93644 |
18.50 |
| 2026-10-10 00:00 |
19:03:10.63 |
-17:55:27.7 |
HIP 93644 |
16.95 |
| 2026-10-10 12:00 |
19:03:18.85 |
-17:55:32.7 |
HIP 93644 |
15.46 |
| 2026-10-11 00:00 |
19:03:27.26 |
-17:55:37.3 |
HIP 93644 |
14.03 |
| 2026-10-11 12:00 |
19:03:35.86 |
-17:55:41.5 |
HIP 93644 |
12.73 |
| 2026-10-12 00:00 |
19:03:44.66 |
-17:55:45.3 |
HIP 93644 |
11.62 |
| 2026-10-12 12:00 |
19:03:53.66 |
-17:55:48.8 |
HIP 93644 |
10.78 |
| 2026-10-13 00:00 |
19:04:02.84 |
-17:55:51.8 |
HIP 93644 |
10.32 |
| 2026-10-13 12:00 |
19:04:12.22 |
-17:55:54.4 |
HIP 93644 |
10.30 |
| 2026-10-14 00:00 |
19:04:21.78 |
-17:55:56.7 |
HIP 93693 |
9.82 |
| 2026-10-14 12:00 |
19:04:31.54 |
-17:55:58.5 |
HIP 93693 |
8.65 |
| 2026-10-15 00:00 |
19:04:41.48 |
-17:56:00.0 |
HIP 93693 |
7.99 |
| 2026-10-15 12:00 |
19:04:51.61 |
-17:56:00.9 |
HIP 93693 |
8.01 |
| 2026-10-16 00:00 |
19:05:01.93 |
-17:56:01.5 |
HIP 93693 |
8.73 |