メタデータ
| 項目 |
値 |
| Designation |
P/2022 O2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-01-07T02:42:09.590400Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:43:49Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
19.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-07-21T09:38:06.057600Z |
| Discovery magnitude (MPC) |
20.85 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) |
2022-10-21.0000000 |
| e |
0.72168447 |
| q (au) |
1.756806 |
| a (au) |
6.312283 |
| i (deg) |
9.425474 |
| Ω (om, deg) |
330.499830 |
| ω (w, deg) |
48.642131 |
| M (ma, deg) |
355.145488 |
等級
散乱 + 全体線形
$$
M_a = (12.985 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.985 |
| 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
天体暦
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
10:52:06.18 |
+03:44:03.1 |
HIP 53142 |
3.01 |
| 2026-06-01 12:00 |
10:52:08.74 |
+03:43:52.3 |
HIP 53142 |
2.68 |
| 2026-06-02 00:00 |
10:52:11.39 |
+03:43:40.9 |
HIP 53142 |
2.49 |
| 2026-06-02 12:00 |
10:52:14.16 |
+03:43:28.9 |
HIP 53142 |
2.48 |
| 2026-06-03 00:00 |
10:52:17.03 |
+03:43:16.2 |
HIP 53142 |
2.69 |
| 2026-06-03 12:00 |
10:52:20.00 |
+03:43:02.8 |
HIP 53142 |
3.10 |
| 2026-06-04 00:00 |
10:52:23.08 |
+03:42:48.8 |
HIP 53142 |
3.65 |
| 2026-06-04 12:00 |
10:52:26.26 |
+03:42:34.1 |
HIP 53142 |
4.30 |
| 2026-06-05 00:00 |
10:52:29.55 |
+03:42:18.8 |
HIP 53142 |
5.03 |
| 2026-06-05 12:00 |
10:52:32.93 |
+03:42:02.8 |
HIP 53142 |
5.83 |
| 2026-06-06 00:00 |
10:52:36.43 |
+03:41:46.1 |
HIP 53142 |
6.67 |
| 2026-06-06 12:00 |
10:52:40.02 |
+03:41:28.9 |
HIP 53142 |
7.56 |
| 2026-06-07 00:00 |
10:52:43.72 |
+03:41:10.9 |
HIP 53142 |
8.48 |
| 2026-06-07 12:00 |
10:52:47.51 |
+03:40:52.4 |
HIP 53142 |
9.44 |
| 2026-06-08 00:00 |
10:52:51.41 |
+03:40:33.2 |
HIP 53142 |
10.44 |
| 2026-06-08 12:00 |
10:52:55.41 |
+03:40:13.3 |
HIP 53142 |
11.47 |
| 2026-06-09 00:00 |
10:52:59.51 |
+03:39:52.8 |
HIP 53142 |
12.53 |
| 2026-06-09 12:00 |
10:53:03.71 |
+03:39:31.7 |
HIP 53286 |
12.74 |
| 2026-06-10 00:00 |
10:53:08.01 |
+03:39:09.9 |
HIP 53286 |
11.78 |
| 2026-06-10 12:00 |
10:53:12.41 |
+03:38:47.5 |
HIP 53286 |
10.83 |
| 2026-06-11 00:00 |
10:53:16.91 |
+03:38:24.4 |
HIP 53286 |
9.90 |
| 2026-06-11 12:00 |
10:53:21.51 |
+03:38:00.7 |
HIP 53286 |
9.02 |
| 2026-06-12 00:00 |
10:53:26.20 |
+03:37:36.4 |
HIP 53286 |
8.21 |
| 2026-06-12 12:00 |
10:53:31.00 |
+03:37:11.5 |
HIP 53286 |
7.50 |
| 2026-06-13 00:00 |
10:53:35.89 |
+03:36:45.9 |
HIP 53286 |
6.95 |
| 2026-06-13 12:00 |
10:53:40.87 |
+03:36:19.7 |
HIP 53286 |
6.60 |
| 2026-06-14 00:00 |
10:53:45.96 |
+03:35:52.8 |
HIP 53286 |
6.51 |
| 2026-06-14 12:00 |
10:53:51.13 |
+03:35:25.4 |
HIP 53286 |
6.70 |
| 2026-06-15 00:00 |
10:53:56.41 |
+03:34:57.3 |
HIP 53286 |
7.17 |
| 2026-06-15 12:00 |
10:54:01.78 |
+03:34:28.6 |
HIP 53286 |
7.87 |
| 2026-06-16 00:00 |
10:54:07.24 |
+03:33:59.3 |
HIP 53286 |
8.77 |
| 2026-06-16 12:00 |
10:54:12.80 |
+03:33:29.4 |
HIP 53286 |
9.83 |
| 2026-06-17 00:00 |
10:54:18.45 |
+03:32:58.8 |
HIP 53286 |
11.00 |
| 2026-06-17 12:00 |
10:54:24.19 |
+03:32:27.7 |
HIP 53286 |
12.26 |
| 2026-06-18 00:00 |
10:54:30.02 |
+03:31:55.9 |
HIP 53286 |
13.60 |
| 2026-06-18 12:00 |
10:54:35.95 |
+03:31:23.6 |
HIP 53286 |
15.01 |
| 2026-06-19 00:00 |
10:54:41.97 |
+03:30:50.6 |
HIP 53286 |
16.47 |
| 2026-06-19 12:00 |
10:54:48.08 |
+03:30:17.0 |
HIP 53286 |
17.97 |
| 2026-06-20 00:00 |
10:54:54.27 |
+03:29:42.9 |
HIP 53286 |
19.52 |
| 2026-06-20 12:00 |
10:55:00.56 |
+03:29:08.1 |
HIP 53286 |
21.11 |
| 2026-06-21 00:00 |
10:55:06.93 |
+03:28:32.8 |
HIP 53286 |
22.73 |
| 2026-06-21 12:00 |
10:55:13.39 |
+03:27:56.9 |
HIP 53512 |
24.06 |
| 2026-06-22 00:00 |
10:55:19.94 |
+03:27:20.4 |
HIP 53512 |
22.41 |