メタデータ
| 項目 |
値 |
| Designation |
503P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-11-12T13:38:28.222080Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:36Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
11.000 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2018-06-03T06:49:46.848000Z |
| Discovery magnitude (MPC) |
20.00 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2019-10-11.0000000 |
| e |
0.48303012 |
| q (au) |
1.885951 |
| a (au) |
3.648087 |
| i (deg) |
10.594784 |
| Ω (om, deg) |
268.626025 |
| ω (w, deg) |
17.915078 |
| M (ma, deg) |
47.022821 |
等級
散乱 + 全体線形
$$
M_a = (12.375 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.375 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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) |
| 2026-03-26 00:00 |
23:13:21.52 |
+02:47:37.4 |
HIP 114639 |
7.12 |
| 2026-03-26 12:00 |
23:14:18.56 |
+02:54:23.2 |
HIP 114639 |
19.48 |
| 2026-03-27 00:00 |
23:15:15.51 |
+03:01:08.6 |
HIP 114849 |
8.48 |
| 2026-03-27 12:00 |
23:16:12.35 |
+03:07:53.7 |
HIP 114849 |
10.30 |
| 2026-03-28 00:00 |
23:17:09.10 |
+03:14:38.4 |
HIP 114971 |
2.30 |
| 2026-03-28 12:00 |
23:18:05.75 |
+03:21:22.8 |
HIP 115101 |
12.47 |
| 2026-03-29 00:00 |
23:19:02.30 |
+03:28:06.8 |
HIP 115167 |
11.12 |
| 2026-03-29 12:00 |
23:19:58.75 |
+03:34:50.5 |
HIP 115167 |
13.36 |
| 2026-03-30 00:00 |
23:20:55.10 |
+03:41:33.7 |
HIP 115383 |
22.95 |
| 2026-03-30 12:00 |
23:21:51.35 |
+03:48:16.6 |
HIP 115412 |
13.73 |
| 2026-03-31 00:00 |
23:22:47.50 |
+03:54:59.1 |
HIP 115412 |
10.61 |
| 2026-03-31 12:00 |
23:23:43.56 |
+04:01:41.2 |
HIP 115544 |
20.47 |
| 2026-04-01 00:00 |
23:24:39.52 |
+04:08:22.9 |
HIP 115544 |
26.09 |
| 2026-04-01 12:00 |
23:25:35.38 |
+04:15:04.2 |
HIP 115692 |
12.55 |
| 2026-04-02 00:00 |
23:26:31.15 |
+04:21:45.0 |
HIP 115692 |
2.88 |
| 2026-04-02 12:00 |
23:27:26.82 |
+04:28:25.5 |
HIP 115779 |
2.03 |
| 2026-04-03 00:00 |
23:28:22.39 |
+04:35:05.5 |
HIP 115779 |
17.31 |
| 2026-04-03 12:00 |
23:29:17.87 |
+04:41:45.0 |
HIP 116004 |
23.53 |
| 2026-04-04 00:00 |
23:30:13.25 |
+04:48:24.2 |
HIP 116004 |
12.36 |
| 2026-04-04 12:00 |
23:31:08.53 |
+04:55:02.8 |
HIP 116004 |
14.86 |
| 2026-04-05 00:00 |
23:32:03.72 |
+05:01:41.1 |
HIP 116036 |
24.47 |
| 2026-04-05 12:00 |
23:32:58.81 |
+05:08:18.8 |
HIP 116273 |
15.35 |
| 2026-04-06 00:00 |
23:33:53.81 |
+05:14:56.1 |
HIP 116273 |
8.59 |
| 2026-04-06 12:00 |
23:34:48.71 |
+05:21:32.9 |
HIP 116338 |
8.90 |
| 2026-04-07 00:00 |
23:35:43.52 |
+05:28:09.3 |
HIP 116338 |
19.51 |
| 2026-04-07 12:00 |
23:36:38.23 |
+05:34:45.1 |
HIP 116521 |
20.41 |
| 2026-04-08 00:00 |
23:37:32.84 |
+05:41:20.5 |
HIP 116521 |
17.55 |
| 2026-04-08 12:00 |
23:38:27.36 |
+05:47:55.4 |
HIP 116771 |
24.51 |
| 2026-04-09 00:00 |
23:39:21.79 |
+05:54:29.7 |
HIP 116715 |
17.81 |
| 2026-04-09 12:00 |
23:40:16.12 |
+06:01:03.6 |
HIP 116715 |
19.71 |
| 2026-04-10 00:00 |
23:41:10.35 |
+06:07:36.9 |
HIP 116877 |
18.03 |
| 2026-04-10 12:00 |
23:42:04.49 |
+06:14:09.7 |
HIP 116877 |
14.39 |
| 2026-04-11 00:00 |
23:42:58.53 |
+06:20:42.0 |
HIP 116877 |
23.15 |
| 2026-04-11 12:00 |
23:43:52.48 |
+06:27:13.7 |
HIP 116877 |
36.18 |
| 2026-04-12 00:00 |
23:44:46.33 |
+06:33:44.9 |
HIP 117137 |
37.77 |
| 2026-04-12 12:00 |
23:45:40.09 |
+06:40:15.5 |
HIP 117137 |
33.73 |
| 2026-04-13 00:00 |
23:46:33.75 |
+06:46:45.6 |
HIP 117311 |
20.97 |
| 2026-04-13 12:00 |
23:47:27.32 |
+06:53:15.1 |
HIP 117311 |
12.43 |
| 2026-04-14 00:00 |
23:48:20.79 |
+06:59:44.0 |
HIP 117398 |
10.18 |
| 2026-04-14 12:00 |
23:49:14.16 |
+07:06:12.3 |
HIP 117398 |
15.24 |
| 2026-04-15 00:00 |
23:50:07.44 |
+07:12:40.1 |
HIP 117636 |
26.86 |
| 2026-04-15 12:00 |
23:51:00.62 |
+07:19:07.2 |
HIP 117636 |
13.57 |
| 2026-04-16 00:00 |
23:51:53.71 |
+07:25:33.8 |
HIP 117677 |
1.78 |