499P/Catalina
メタデータ
| 項目 |
値 |
| Designation |
499P/Catalina |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-04T09:55:03.910080Z |
| Orbit solution date (soln_date, UTC) |
2025-09-09T12:43:01Z |
| Obs used |
468 |
| NEO |
Yes |
| M1 |
19.600 |
| K1 |
4.500 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2024-02-28.0000000 |
| e |
0.69137458 |
| q (au) |
0.930634 |
| a (au) |
3.015417 |
| i (deg) |
24.586385 |
| Ω (om, deg) |
139.328525 |
| ω (w, deg) |
2.563338 |
| M (ma, deg) |
290.278038 |
等級
散乱 + 全体線形
$$
M_a = (19.673 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
19.673 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
19:29:12.70 |
-10:34:17.0 |
HIP 95763 |
15.88 |
| 2026-02-03 12:00 |
19:29:47.14 |
-10:33:16.6 |
HIP 95763 |
20.99 |
| 2026-02-04 00:00 |
19:30:21.49 |
-10:32:15.6 |
HIP 95763 |
27.80 |
| 2026-02-04 12:00 |
19:30:55.73 |
-10:31:13.9 |
HIP 95862 |
34.72 |
| 2026-02-05 00:00 |
19:31:29.88 |
-10:30:11.6 |
HIP 95862 |
40.20 |
| 2026-02-05 12:00 |
19:32:03.92 |
-10:29:08.6 |
HIP 96327 |
45.29 |
| 2026-02-06 00:00 |
19:32:37.85 |
-10:28:05.0 |
HIP 96327 |
37.14 |
| 2026-02-06 12:00 |
19:33:11.69 |
-10:27:00.8 |
HIP 96327 |
29.17 |
| 2026-02-07 00:00 |
19:33:45.42 |
-10:25:56.0 |
HIP 96327 |
21.54 |
| 2026-02-07 12:00 |
19:34:19.04 |
-10:24:50.6 |
HIP 96327 |
14.75 |
| 2026-02-08 00:00 |
19:34:52.56 |
-10:23:44.5 |
HIP 96327 |
10.52 |
| 2026-02-08 12:00 |
19:35:25.98 |
-10:22:37.9 |
HIP 96388 |
5.74 |
| 2026-02-09 00:00 |
19:35:59.29 |
-10:21:30.7 |
HIP 96388 |
2.53 |
| 2026-02-09 12:00 |
19:36:32.49 |
-10:20:22.9 |
HIP 96471 |
7.00 |
| 2026-02-10 00:00 |
19:37:05.58 |
-10:19:14.5 |
HIP 96471 |
8.79 |
| 2026-02-10 12:00 |
19:37:38.56 |
-10:18:05.6 |
HIP 96479 |
14.60 |
| 2026-02-11 00:00 |
19:38:11.44 |
-10:16:56.1 |
HIP 96622 |
10.89 |
| 2026-02-11 12:00 |
19:38:44.20 |
-10:15:46.1 |
HIP 96643 |
5.14 |
| 2026-02-12 00:00 |
19:39:16.86 |
-10:14:35.5 |
HIP 96643 |
7.52 |
| 2026-02-12 12:00 |
19:39:49.40 |
-10:13:24.3 |
HIP 96646 |
14.75 |
| 2026-02-13 00:00 |
19:40:21.83 |
-10:12:12.7 |
HIP 96646 |
22.51 |
| 2026-02-13 12:00 |
19:40:54.15 |
-10:11:00.5 |
HIP 96916 |
17.58 |
| 2026-02-14 00:00 |
19:41:26.35 |
-10:09:47.8 |
HIP 96916 |
9.76 |
| 2026-02-14 12:00 |
19:41:58.44 |
-10:08:34.5 |
HIP 96916 |
3.17 |
| 2026-02-15 00:00 |
19:42:30.41 |
-10:07:20.8 |
HIP 96916 |
7.22 |
| 2026-02-15 12:00 |
19:43:02.27 |
-10:06:06.6 |
HIP 96916 |
14.84 |
| 2026-02-16 00:00 |
19:43:34.01 |
-10:04:51.9 |
HIP 96916 |
22.65 |
| 2026-02-16 12:00 |
19:44:05.63 |
-10:03:36.7 |
HIP 96916 |
30.49 |
| 2026-02-17 00:00 |
19:44:37.13 |
-10:02:21.1 |
HIP 97157 |
32.29 |
| 2026-02-17 12:00 |
19:45:08.52 |
-10:01:05.0 |
HIP 97353 |
30.07 |
| 2026-02-18 00:00 |
19:45:39.78 |
-09:59:48.4 |
HIP 97353 |
22.58 |
| 2026-02-18 12:00 |
19:46:10.92 |
-09:58:31.4 |
HIP 97353 |
15.42 |
| 2026-02-19 00:00 |
19:46:41.94 |
-09:57:13.9 |
HIP 97353 |
9.33 |
| 2026-02-19 12:00 |
19:47:12.84 |
-09:55:56.0 |
HIP 97353 |
7.52 |
| 2026-02-20 00:00 |
19:47:43.62 |
-09:54:37.7 |
HIP 97353 |
12.03 |
| 2026-02-20 12:00 |
19:48:14.27 |
-09:53:19.0 |
HIP 97380 |
16.82 |
| 2026-02-21 00:00 |
19:48:44.79 |
-09:51:59.9 |
HIP 97380 |
21.85 |
| 2026-02-21 12:00 |
19:49:15.20 |
-09:50:40.3 |
HIP 97592 |
16.60 |
| 2026-02-22 00:00 |
19:49:45.47 |
-09:49:20.4 |
HIP 97592 |
12.60 |
| 2026-02-22 12:00 |
19:50:15.62 |
-09:48:00.1 |
HIP 97592 |
12.51 |
| 2026-02-23 00:00 |
19:50:45.64 |
-09:46:39.5 |
HIP 97592 |
16.36 |
| 2026-02-23 12:00 |
19:51:15.53 |
-09:45:18.5 |
HIP 97701 |
13.82 |
| 2026-02-24 00:00 |
19:51:45.29 |
-09:43:57.1 |
HIP 97701 |
13.84 |