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) |
| 2026-05-12 00:00 |
10:51:55.12 |
+03:41:55.5 |
HIP 53142 |
6.49 |
| 2026-05-12 12:00 |
10:51:53.16 |
+03:42:12.1 |
HIP 53142 |
6.72 |
| 2026-05-13 00:00 |
10:51:51.31 |
+03:42:28.1 |
HIP 53142 |
6.98 |
| 2026-05-13 12:00 |
10:51:49.58 |
+03:42:43.3 |
HIP 53142 |
7.24 |
| 2026-05-14 00:00 |
10:51:47.96 |
+03:42:57.9 |
HIP 53142 |
7.50 |
| 2026-05-14 12:00 |
10:51:46.47 |
+03:43:11.8 |
HIP 53142 |
7.76 |
| 2026-05-15 00:00 |
10:51:45.09 |
+03:43:25.0 |
HIP 53142 |
8.01 |
| 2026-05-15 12:00 |
10:51:43.83 |
+03:43:37.5 |
HIP 53142 |
8.25 |
| 2026-05-16 00:00 |
10:51:42.68 |
+03:43:49.3 |
HIP 53142 |
8.47 |
| 2026-05-16 12:00 |
10:51:41.65 |
+03:44:00.4 |
HIP 53142 |
8.68 |
| 2026-05-17 00:00 |
10:51:40.74 |
+03:44:10.8 |
HIP 53142 |
8.86 |
| 2026-05-17 12:00 |
10:51:39.94 |
+03:44:20.6 |
HIP 53142 |
9.03 |
| 2026-05-18 00:00 |
10:51:39.26 |
+03:44:29.6 |
HIP 53142 |
9.17 |
| 2026-05-18 12:00 |
10:51:38.69 |
+03:44:37.9 |
HIP 53142 |
9.29 |
| 2026-05-19 00:00 |
10:51:38.24 |
+03:44:45.5 |
HIP 53142 |
9.38 |
| 2026-05-19 12:00 |
10:51:37.91 |
+03:44:52.5 |
HIP 53142 |
9.45 |
| 2026-05-20 00:00 |
10:51:37.69 |
+03:44:58.7 |
HIP 53142 |
9.50 |
| 2026-05-20 12:00 |
10:51:37.59 |
+03:45:04.3 |
HIP 53142 |
9.51 |
| 2026-05-21 00:00 |
10:51:37.60 |
+03:45:09.1 |
HIP 53142 |
9.50 |
| 2026-05-21 12:00 |
10:51:37.73 |
+03:45:13.3 |
HIP 53142 |
9.47 |
| 2026-05-22 00:00 |
10:51:37.97 |
+03:45:16.8 |
HIP 53142 |
9.40 |
| 2026-05-22 12:00 |
10:51:38.32 |
+03:45:19.5 |
HIP 53142 |
9.31 |
| 2026-05-23 00:00 |
10:51:38.79 |
+03:45:21.6 |
HIP 53142 |
9.19 |
| 2026-05-23 12:00 |
10:51:39.37 |
+03:45:23.0 |
HIP 53142 |
9.05 |
| 2026-05-24 00:00 |
10:51:40.06 |
+03:45:23.8 |
HIP 53142 |
8.87 |
| 2026-05-24 12:00 |
10:51:40.87 |
+03:45:23.8 |
HIP 53142 |
8.67 |
| 2026-05-25 00:00 |
10:51:41.79 |
+03:45:23.2 |
HIP 53142 |
8.44 |
| 2026-05-25 12:00 |
10:51:42.82 |
+03:45:21.8 |
HIP 53142 |
8.19 |
| 2026-05-26 00:00 |
10:51:43.96 |
+03:45:19.8 |
HIP 53142 |
7.91 |
| 2026-05-26 12:00 |
10:51:45.21 |
+03:45:17.1 |
HIP 53142 |
7.60 |
| 2026-05-27 00:00 |
10:51:46.57 |
+03:45:13.7 |
HIP 53142 |
7.27 |
| 2026-05-27 12:00 |
10:51:48.04 |
+03:45:09.7 |
HIP 53142 |
6.91 |
| 2026-05-28 00:00 |
10:51:49.62 |
+03:45:05.0 |
HIP 53142 |
6.53 |
| 2026-05-28 12:00 |
10:51:51.32 |
+03:44:59.6 |
HIP 53142 |
6.12 |
| 2026-05-29 00:00 |
10:51:53.12 |
+03:44:53.5 |
HIP 53142 |
5.70 |
| 2026-05-29 12:00 |
10:51:55.02 |
+03:44:46.8 |
HIP 53142 |
5.25 |
| 2026-05-30 00:00 |
10:51:57.04 |
+03:44:39.4 |
HIP 53142 |
4.80 |
| 2026-05-30 12:00 |
10:51:59.17 |
+03:44:31.3 |
HIP 53142 |
4.33 |
| 2026-05-31 00:00 |
10:52:01.40 |
+03:44:22.5 |
HIP 53142 |
3.86 |
| 2026-05-31 12:00 |
10:52:03.74 |
+03:44:13.1 |
HIP 53142 |
3.42 |
| 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 |