メタデータ
| 項目 |
値 |
| Designation |
505P/Palomar |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-09-27T02:30:29.422080Z |
| Orbit solution date (soln_date, UTC) |
2025-08-01T17:26:05Z |
| Obs used |
84 |
| NEO |
- |
| M1 |
16.800 |
| K1 |
5.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2009-05-27T04:54:45.216000Z |
| Discovery magnitude (MPC) |
19.60 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2014-09-06.0000000 |
| e |
0.31923792 |
| q (au) |
2.775295 |
| a (au) |
4.076748 |
| i (deg) |
11.483482 |
| Ω (om, deg) |
112.299648 |
| ω (w, deg) |
144.977424 |
| M (ma, deg) |
226.239740 |
等級
散乱 + 全体線形
$$
M_a = (10.961 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
10.961 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.501 |
| 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
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) |
| 2026-05-12 00:00 |
20:14:10.43 |
-17:34:10.8 |
HIP 99710 |
6.89 |
| 2026-05-12 12:00 |
20:14:25.32 |
-17:34:39.0 |
HIP 99710 |
8.51 |
| 2026-05-13 00:00 |
20:14:39.90 |
-17:35:08.6 |
HIP 99710 |
11.02 |
| 2026-05-13 12:00 |
20:14:54.17 |
-17:35:39.6 |
HIP 99710 |
13.89 |
| 2026-05-14 00:00 |
20:15:08.12 |
-17:36:12.1 |
HIP 99710 |
16.89 |
| 2026-05-14 12:00 |
20:15:21.75 |
-17:36:45.9 |
HIP 99710 |
19.93 |
| 2026-05-15 00:00 |
20:15:35.07 |
-17:37:21.2 |
HIP 99710 |
22.96 |
| 2026-05-15 12:00 |
20:15:48.06 |
-17:37:57.9 |
HIP 99710 |
25.96 |
| 2026-05-16 00:00 |
20:16:00.74 |
-17:38:36.1 |
HIP 99710 |
28.92 |
| 2026-05-16 12:00 |
20:16:13.09 |
-17:39:15.8 |
HIP 99710 |
31.82 |
| 2026-05-17 00:00 |
20:16:25.13 |
-17:39:56.9 |
HIP 100047 |
30.90 |
| 2026-05-17 12:00 |
20:16:36.83 |
-17:40:39.5 |
HIP 100047 |
29.66 |
| 2026-05-18 00:00 |
20:16:48.22 |
-17:41:23.6 |
HIP 100047 |
28.71 |
| 2026-05-18 12:00 |
20:16:59.27 |
-17:42:09.2 |
HIP 100129 |
26.71 |
| 2026-05-19 00:00 |
20:17:10.01 |
-17:42:56.3 |
HIP 100129 |
24.04 |
| 2026-05-19 12:00 |
20:17:20.41 |
-17:43:44.9 |
HIP 100129 |
21.43 |
| 2026-05-20 00:00 |
20:17:30.49 |
-17:44:35.1 |
HIP 100129 |
18.89 |
| 2026-05-20 12:00 |
20:17:40.24 |
-17:45:26.8 |
HIP 100129 |
16.42 |
| 2026-05-21 00:00 |
20:17:49.65 |
-17:46:20.0 |
HIP 100129 |
14.01 |
| 2026-05-21 12:00 |
20:17:58.74 |
-17:47:14.8 |
HIP 100129 |
11.66 |
| 2026-05-22 00:00 |
20:18:07.50 |
-17:48:11.1 |
HIP 100129 |
9.38 |
| 2026-05-22 12:00 |
20:18:15.93 |
-17:49:09.0 |
HIP 100129 |
7.17 |
| 2026-05-23 00:00 |
20:18:24.03 |
-17:50:08.5 |
HIP 100129 |
5.04 |
| 2026-05-23 12:00 |
20:18:31.80 |
-17:51:09.5 |
HIP 100129 |
3.06 |
| 2026-05-24 00:00 |
20:18:39.23 |
-17:52:12.1 |
HIP 100129 |
1.56 |
| 2026-05-24 12:00 |
20:18:46.33 |
-17:53:16.2 |
HIP 100129 |
1.99 |
| 2026-05-25 00:00 |
20:18:53.10 |
-17:54:22.0 |
HIP 100129 |
3.65 |
| 2026-05-25 12:00 |
20:18:59.53 |
-17:55:29.3 |
HIP 100129 |
5.47 |
| 2026-05-26 00:00 |
20:19:05.63 |
-17:56:38.3 |
HIP 100129 |
7.29 |
| 2026-05-26 12:00 |
20:19:11.40 |
-17:57:48.8 |
HIP 100129 |
9.09 |
| 2026-05-27 00:00 |
20:19:16.82 |
-17:59:00.9 |
HIP 100129 |
10.85 |
| 2026-05-27 12:00 |
20:19:21.92 |
-18:00:14.6 |
HIP 100129 |
12.58 |
| 2026-05-28 00:00 |
20:19:26.67 |
-18:01:30.0 |
HIP 100129 |
14.27 |
| 2026-05-28 12:00 |
20:19:31.09 |
-18:02:46.9 |
HIP 100129 |
15.92 |
| 2026-05-29 00:00 |
20:19:35.18 |
-18:04:05.4 |
HIP 100129 |
17.54 |
| 2026-05-29 12:00 |
20:19:38.92 |
-18:05:25.6 |
HIP 100334 |
18.16 |
| 2026-05-30 00:00 |
20:19:42.33 |
-18:06:47.4 |
HIP 100334 |
17.11 |
| 2026-05-30 12:00 |
20:19:45.40 |
-18:08:10.7 |
HIP 100334 |
16.23 |
| 2026-05-31 00:00 |
20:19:48.13 |
-18:09:35.7 |
HIP 100334 |
15.54 |
| 2026-05-31 12:00 |
20:19:50.52 |
-18:11:02.3 |
HIP 100334 |
15.06 |
| 2026-06-01 00:00 |
20:19:52.58 |
-18:12:30.6 |
HIP 100334 |
14.81 |
| 2026-06-01 12:00 |
20:19:54.29 |
-18:14:00.4 |
HIP 100334 |
14.81 |
| 2026-06-02 00:00 |
20:19:55.67 |
-18:15:31.9 |
HIP 100334 |
15.06 |