メタデータ
| 項目 |
値 |
| Designation |
P/2022 S1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-08-19T02:31:28.692480Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:43:51Z |
| Obs used |
80 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
8.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-23T14:19:53.068800Z |
| Discovery magnitude (MPC) |
20.52 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-11-01.0000000 |
| e |
0.50834103 |
| q (au) |
3.151366 |
| a (au) |
6.409659 |
| i (deg) |
34.581851 |
| Ω (om, deg) |
136.092070 |
| ω (w, deg) |
262.742903 |
| M (ma, deg) |
4.488132 |
等級
散乱 + 全体線形
$$
M_a = (12.398 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.398 |
| n |
6.000 |
| gf |
0.998 |
| gb |
-0.659 |
| k |
0.800 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
11:32:26.82 |
+27:21:57.5 |
HIP 56198 |
19.43 |
| 2026-05-12 12:00 |
11:32:23.47 |
+27:21:22.9 |
HIP 56198 |
19.12 |
| 2026-05-13 00:00 |
11:32:20.25 |
+27:20:47.4 |
HIP 56198 |
18.88 |
| 2026-05-13 12:00 |
11:32:17.16 |
+27:20:10.8 |
HIP 56198 |
18.73 |
| 2026-05-14 00:00 |
11:32:14.20 |
+27:19:33.3 |
HIP 56198 |
18.64 |
| 2026-05-14 12:00 |
11:32:11.38 |
+27:18:54.7 |
HIP 56198 |
18.64 |
| 2026-05-15 00:00 |
11:32:08.68 |
+27:18:15.2 |
HIP 56198 |
18.71 |
| 2026-05-15 12:00 |
11:32:06.13 |
+27:17:34.6 |
HIP 56198 |
18.85 |
| 2026-05-16 00:00 |
11:32:03.70 |
+27:16:53.1 |
HIP 56198 |
19.07 |
| 2026-05-16 12:00 |
11:32:01.41 |
+27:16:10.7 |
HIP 56198 |
19.35 |
| 2026-05-17 00:00 |
11:31:59.25 |
+27:15:27.3 |
HIP 56198 |
19.70 |
| 2026-05-17 12:00 |
11:31:57.22 |
+27:14:42.9 |
HIP 56198 |
20.10 |
| 2026-05-18 00:00 |
11:31:55.33 |
+27:13:57.6 |
HIP 56198 |
20.56 |
| 2026-05-18 12:00 |
11:31:53.57 |
+27:13:11.3 |
HIP 56198 |
21.08 |
| 2026-05-19 00:00 |
11:31:51.95 |
+27:12:24.2 |
HIP 56198 |
21.64 |
| 2026-05-19 12:00 |
11:31:50.46 |
+27:11:36.1 |
HIP 56198 |
22.24 |
| 2026-05-20 00:00 |
11:31:49.10 |
+27:10:47.1 |
HIP 56198 |
22.89 |
| 2026-05-20 12:00 |
11:31:47.88 |
+27:09:57.2 |
HIP 56142 |
23.19 |
| 2026-05-21 00:00 |
11:31:46.79 |
+27:09:06.4 |
HIP 56142 |
22.47 |
| 2026-05-21 12:00 |
11:31:45.83 |
+27:08:14.8 |
HIP 56142 |
21.79 |
| 2026-05-22 00:00 |
11:31:45.01 |
+27:07:22.3 |
HIP 56142 |
21.13 |
| 2026-05-22 12:00 |
11:31:44.31 |
+27:06:28.9 |
HIP 56142 |
20.51 |
| 2026-05-23 00:00 |
11:31:43.75 |
+27:05:34.6 |
HIP 56142 |
19.93 |
| 2026-05-23 12:00 |
11:31:43.33 |
+27:04:39.6 |
HIP 56142 |
19.39 |
| 2026-05-24 00:00 |
11:31:43.03 |
+27:03:43.6 |
HIP 56142 |
18.91 |
| 2026-05-24 12:00 |
11:31:42.87 |
+27:02:46.9 |
HIP 56142 |
18.48 |
| 2026-05-25 00:00 |
11:31:42.84 |
+27:01:49.3 |
HIP 56142 |
18.11 |
| 2026-05-25 12:00 |
11:31:42.94 |
+27:00:51.0 |
HIP 56142 |
17.81 |
| 2026-05-26 00:00 |
11:31:43.17 |
+26:59:51.8 |
HIP 56142 |
17.58 |
| 2026-05-26 12:00 |
11:31:43.53 |
+26:58:51.8 |
HIP 56142 |
17.43 |
| 2026-05-27 00:00 |
11:31:44.03 |
+26:57:51.1 |
HIP 56142 |
17.37 |
| 2026-05-27 12:00 |
11:31:44.65 |
+26:56:49.5 |
HIP 56142 |
17.39 |
| 2026-05-28 00:00 |
11:31:45.40 |
+26:55:47.2 |
HIP 56142 |
17.51 |
| 2026-05-28 12:00 |
11:31:46.28 |
+26:54:44.2 |
HIP 56142 |
17.71 |
| 2026-05-29 00:00 |
11:31:47.30 |
+26:53:40.4 |
HIP 56142 |
18.01 |
| 2026-05-29 12:00 |
11:31:48.44 |
+26:52:35.8 |
HIP 56142 |
18.39 |
| 2026-05-30 00:00 |
11:31:49.71 |
+26:51:30.5 |
HIP 56142 |
18.87 |
| 2026-05-30 12:00 |
11:31:51.11 |
+26:50:24.5 |
HIP 56142 |
19.42 |
| 2026-05-31 00:00 |
11:31:52.63 |
+26:49:17.7 |
HIP 56142 |
20.06 |
| 2026-05-31 12:00 |
11:31:54.29 |
+26:48:10.2 |
HIP 56142 |
20.78 |
| 2026-06-01 00:00 |
11:31:56.07 |
+26:47:02.1 |
HIP 56142 |
21.57 |
| 2026-06-01 12:00 |
11:31:57.98 |
+26:45:53.2 |
HIP 56373 |
21.78 |
| 2026-06-02 00:00 |
11:32:00.01 |
+26:44:43.6 |
HIP 56373 |
20.80 |