メタデータ
| 項目 |
値 |
| Designation |
459P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-28T07:40:35.670720Z |
| Orbit solution date (soln_date, UTC) |
2024-07-07T00:42:23Z |
| Obs used |
1061 |
| 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) |
2018-12-21.0000000 |
| e |
0.52243972 |
| q (au) |
1.600719 |
| a (au) |
3.351867 |
| i (deg) |
13.708393 |
| Ω (om, deg) |
272.043349 |
| ω (w, deg) |
189.881941 |
| M (ma, deg) |
111.091091 |
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) |
| 2026-03-26 00:00 |
19:49:38.08 |
-17:43:45.4 |
HIP 97596 |
15.95 |
| 2026-03-26 12:00 |
19:49:52.70 |
-17:42:39.0 |
HIP 97596 |
15.43 |
| 2026-03-27 00:00 |
19:50:07.17 |
-17:41:32.7 |
HIP 97596 |
15.77 |
| 2026-03-27 12:00 |
19:50:21.50 |
-17:40:26.7 |
HIP 97596 |
16.88 |
| 2026-03-28 00:00 |
19:50:35.68 |
-17:39:20.8 |
HIP 97596 |
18.62 |
| 2026-03-28 12:00 |
19:50:49.71 |
-17:38:15.1 |
HIP 97596 |
20.81 |
| 2026-03-29 00:00 |
19:51:03.59 |
-17:37:09.7 |
HIP 97596 |
23.30 |
| 2026-03-29 12:00 |
19:51:17.33 |
-17:36:04.4 |
HIP 97740 |
21.09 |
| 2026-03-30 00:00 |
19:51:30.92 |
-17:34:59.3 |
HIP 97740 |
19.24 |
| 2026-03-30 12:00 |
19:51:44.36 |
-17:33:54.4 |
HIP 97740 |
17.86 |
| 2026-03-31 00:00 |
19:51:57.65 |
-17:32:49.7 |
HIP 97740 |
17.05 |
| 2026-03-31 12:00 |
19:52:10.78 |
-17:31:45.3 |
HIP 97740 |
16.86 |
| 2026-04-01 00:00 |
19:52:23.77 |
-17:30:41.1 |
HIP 97740 |
17.31 |
| 2026-04-01 12:00 |
19:52:36.60 |
-17:29:37.1 |
HIP 97740 |
18.31 |
| 2026-04-02 00:00 |
19:52:49.28 |
-17:28:33.3 |
HIP 97740 |
19.78 |
| 2026-04-02 12:00 |
19:53:01.80 |
-17:27:29.8 |
HIP 97740 |
21.59 |
| 2026-04-03 00:00 |
19:53:14.17 |
-17:26:26.5 |
HIP 97740 |
23.66 |
| 2026-04-03 12:00 |
19:53:26.38 |
-17:25:23.4 |
HIP 97740 |
25.92 |
| 2026-04-04 00:00 |
19:53:38.43 |
-17:24:20.6 |
HIP 97740 |
28.30 |
| 2026-04-04 12:00 |
19:53:50.33 |
-17:23:18.0 |
HIP 98054 |
27.55 |
| 2026-04-05 00:00 |
19:54:02.06 |
-17:22:15.7 |
HIP 98054 |
25.43 |
| 2026-04-05 12:00 |
19:54:13.64 |
-17:21:13.7 |
HIP 98054 |
23.53 |
| 2026-04-06 00:00 |
19:54:25.05 |
-17:20:11.9 |
HIP 98054 |
21.88 |
| 2026-04-06 12:00 |
19:54:36.31 |
-17:19:10.5 |
HIP 98054 |
20.54 |
| 2026-04-07 00:00 |
19:54:47.40 |
-17:18:09.2 |
HIP 98054 |
19.56 |
| 2026-04-07 12:00 |
19:54:58.32 |
-17:17:08.3 |
HIP 98054 |
18.96 |
| 2026-04-08 00:00 |
19:55:09.09 |
-17:16:07.7 |
HIP 98054 |
18.78 |
| 2026-04-08 12:00 |
19:55:19.68 |
-17:15:07.3 |
HIP 98054 |
19.00 |
| 2026-04-09 00:00 |
19:55:30.11 |
-17:14:07.3 |
HIP 98054 |
19.60 |
| 2026-04-09 12:00 |
19:55:40.38 |
-17:13:07.5 |
HIP 98054 |
20.53 |
| 2026-04-10 00:00 |
19:55:50.47 |
-17:12:08.1 |
HIP 98054 |
21.74 |
| 2026-04-10 12:00 |
19:56:00.40 |
-17:11:09.0 |
HIP 98054 |
23.16 |
| 2026-04-11 00:00 |
19:56:10.15 |
-17:10:10.2 |
HIP 98054 |
24.74 |
| 2026-04-11 12:00 |
19:56:19.73 |
-17:09:11.7 |
HIP 98054 |
26.45 |
| 2026-04-12 00:00 |
19:56:29.15 |
-17:08:13.6 |
HIP 98054 |
28.26 |
| 2026-04-12 12:00 |
19:56:38.38 |
-17:07:15.8 |
HIP 98054 |
30.13 |
| 2026-04-13 00:00 |
19:56:47.45 |
-17:06:18.3 |
HIP 98150 |
29.39 |
| 2026-04-13 12:00 |
19:56:56.34 |
-17:05:21.2 |
HIP 98150 |
28.50 |
| 2026-04-14 00:00 |
19:57:05.05 |
-17:04:24.4 |
HIP 98150 |
27.77 |
| 2026-04-14 12:00 |
19:57:13.59 |
-17:03:28.0 |
HIP 98150 |
27.22 |
| 2026-04-15 00:00 |
19:57:21.95 |
-17:02:31.9 |
HIP 98150 |
26.84 |
| 2026-04-15 12:00 |
19:57:30.13 |
-17:01:36.2 |
HIP 98150 |
26.63 |
| 2026-04-16 00:00 |
19:57:38.13 |
-17:00:40.9 |
HIP 98150 |
26.57 |