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) |
| 2026-03-26 00:00 |
11:46:06.84 |
+26:46:24.7 |
HIP 57400 |
4.26 |
| 2026-03-26 12:00 |
11:45:54.36 |
+26:47:48.2 |
HIP 57400 |
3.61 |
| 2026-03-27 00:00 |
11:45:41.91 |
+26:49:10.4 |
HIP 57400 |
5.22 |
| 2026-03-27 12:00 |
11:45:29.51 |
+26:50:31.3 |
HIP 57400 |
7.78 |
| 2026-03-28 00:00 |
11:45:17.15 |
+26:51:50.9 |
HIP 57400 |
10.60 |
| 2026-03-28 12:00 |
11:45:04.83 |
+26:53:09.2 |
HIP 57400 |
13.52 |
| 2026-03-29 00:00 |
11:44:52.55 |
+26:54:26.2 |
HIP 57400 |
16.46 |
| 2026-03-29 12:00 |
11:44:40.32 |
+26:55:41.8 |
HIP 57400 |
19.42 |
| 2026-03-30 00:00 |
11:44:28.13 |
+26:56:56.2 |
HIP 57400 |
22.36 |
| 2026-03-30 12:00 |
11:44:16.00 |
+26:58:09.2 |
HIP 57400 |
25.30 |
| 2026-03-31 00:00 |
11:44:03.91 |
+26:59:20.9 |
HIP 57103 |
26.88 |
| 2026-03-31 12:00 |
11:43:51.88 |
+27:00:31.3 |
HIP 57103 |
25.28 |
| 2026-04-01 00:00 |
11:43:39.90 |
+27:01:40.3 |
HIP 57103 |
23.94 |
| 2026-04-01 12:00 |
11:43:27.98 |
+27:02:48.0 |
HIP 57103 |
22.87 |
| 2026-04-02 00:00 |
11:43:16.11 |
+27:03:54.4 |
HIP 57103 |
22.12 |
| 2026-04-02 12:00 |
11:43:04.30 |
+27:04:59.4 |
HIP 57103 |
21.72 |
| 2026-04-03 00:00 |
11:42:52.55 |
+27:06:03.1 |
HIP 57103 |
21.66 |
| 2026-04-03 12:00 |
11:42:40.87 |
+27:07:05.4 |
HIP 57103 |
21.96 |
| 2026-04-04 00:00 |
11:42:29.24 |
+27:08:06.4 |
HIP 57103 |
22.58 |
| 2026-04-04 12:00 |
11:42:17.68 |
+27:09:06.1 |
HIP 57103 |
23.49 |
| 2026-04-05 00:00 |
11:42:06.19 |
+27:10:04.4 |
HIP 57103 |
24.66 |
| 2026-04-05 12:00 |
11:41:54.76 |
+27:11:01.4 |
HIP 57103 |
26.04 |
| 2026-04-06 00:00 |
11:41:43.41 |
+27:11:57.0 |
HIP 57024 |
25.81 |
| 2026-04-06 12:00 |
11:41:32.12 |
+27:12:51.3 |
HIP 57024 |
24.76 |
| 2026-04-07 00:00 |
11:41:20.91 |
+27:13:44.3 |
HIP 57024 |
23.99 |
| 2026-04-07 12:00 |
11:41:09.77 |
+27:14:35.9 |
HIP 57024 |
23.50 |
| 2026-04-08 00:00 |
11:40:58.71 |
+27:15:26.1 |
HIP 57024 |
23.32 |
| 2026-04-08 12:00 |
11:40:47.72 |
+27:16:15.0 |
HIP 57024 |
23.44 |
| 2026-04-09 00:00 |
11:40:36.81 |
+27:17:02.5 |
HIP 56878 |
23.62 |
| 2026-04-09 12:00 |
11:40:25.98 |
+27:17:48.7 |
HIP 56878 |
23.05 |
| 2026-04-10 00:00 |
11:40:15.23 |
+27:18:33.5 |
HIP 56878 |
22.74 |
| 2026-04-10 12:00 |
11:40:04.56 |
+27:19:17.0 |
HIP 56878 |
22.68 |
| 2026-04-11 00:00 |
11:39:53.98 |
+27:19:59.2 |
HIP 56878 |
22.87 |
| 2026-04-11 12:00 |
11:39:43.48 |
+27:20:40.0 |
HIP 56878 |
23.30 |
| 2026-04-12 00:00 |
11:39:33.06 |
+27:21:19.4 |
HIP 56878 |
23.95 |
| 2026-04-12 12:00 |
11:39:22.74 |
+27:21:57.5 |
HIP 56704 |
24.41 |
| 2026-04-13 00:00 |
11:39:12.50 |
+27:22:34.2 |
HIP 56704 |
22.07 |
| 2026-04-13 12:00 |
11:39:02.36 |
+27:23:09.6 |
HIP 56704 |
19.74 |
| 2026-04-14 00:00 |
11:38:52.31 |
+27:23:43.7 |
HIP 56704 |
17.45 |
| 2026-04-14 12:00 |
11:38:42.35 |
+27:24:16.4 |
HIP 56704 |
15.18 |
| 2026-04-15 00:00 |
11:38:32.48 |
+27:24:47.8 |
HIP 56704 |
12.93 |
| 2026-04-15 12:00 |
11:38:22.71 |
+27:25:17.8 |
HIP 56704 |
10.71 |
| 2026-04-16 00:00 |
11:38:13.04 |
+27:25:46.5 |
HIP 56704 |
8.52 |