メタデータ
| 項目 |
値 |
| Designation |
P/2024 O2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-04-20T05:24:07.672320Z |
| Orbit solution date (soln_date, UTC) |
2024-10-26T00:12:24Z |
| Obs used |
62 |
| NEO |
- |
| M1 |
12.500 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-07-28T12:51:01.324800Z |
| Discovery magnitude (MPC) |
20.88 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) |
2024-08-25.0000000 |
| e |
0.49949412 |
| q (au) |
3.697574 |
| a (au) |
7.387674 |
| i (deg) |
28.973263 |
| Ω (om, deg) |
6.806464 |
| ω (w, deg) |
310.788811 |
| M (ma, deg) |
6.222656 |
等級
散乱 + 全体線形
$$
M_a = (13.462 + 2.815\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.462 |
| n |
2.815 |
| gf |
1.000 |
| gb |
-0.865 |
| 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) |
| 2026-03-26 00:00 |
01:55:39.00 |
+28:39:51.1 |
HIP 8938 |
10.60 |
| 2026-03-26 12:00 |
01:56:03.70 |
+28:42:09.2 |
HIP 8938 |
13.61 |
| 2026-03-27 00:00 |
01:56:28.45 |
+28:44:27.7 |
HIP 8938 |
18.09 |
| 2026-03-27 12:00 |
01:56:53.24 |
+28:46:46.7 |
HIP 9166 |
21.55 |
| 2026-03-28 00:00 |
01:57:18.08 |
+28:49:06.1 |
HIP 9166 |
20.24 |
| 2026-03-28 12:00 |
01:57:42.96 |
+28:51:25.9 |
HIP 9246 |
15.46 |
| 2026-03-29 00:00 |
01:58:07.89 |
+28:53:46.1 |
HIP 9246 |
10.20 |
| 2026-03-29 12:00 |
01:58:32.85 |
+28:56:06.8 |
HIP 9246 |
6.28 |
| 2026-03-30 00:00 |
01:58:57.86 |
+28:58:27.8 |
HIP 9246 |
6.77 |
| 2026-03-30 12:00 |
01:59:22.91 |
+29:00:49.3 |
HIP 9246 |
11.10 |
| 2026-03-31 00:00 |
01:59:48.00 |
+29:03:11.2 |
HIP 9246 |
16.50 |
| 2026-03-31 12:00 |
02:00:13.13 |
+29:05:33.4 |
HIP 9417 |
13.39 |
| 2026-04-01 00:00 |
02:00:38.30 |
+29:07:56.1 |
HIP 9417 |
7.88 |
| 2026-04-01 12:00 |
02:01:03.51 |
+29:10:19.2 |
HIP 9417 |
4.08 |
| 2026-04-02 00:00 |
02:01:28.75 |
+29:12:42.6 |
HIP 9417 |
6.57 |
| 2026-04-02 12:00 |
02:01:54.04 |
+29:15:06.4 |
HIP 9417 |
11.91 |
| 2026-04-03 00:00 |
02:02:19.36 |
+29:17:30.7 |
HIP 9417 |
17.70 |
| 2026-04-03 12:00 |
02:02:44.72 |
+29:19:55.2 |
HIP 9417 |
23.61 |
| 2026-04-04 00:00 |
02:03:10.11 |
+29:22:20.2 |
HIP 9417 |
29.58 |
| 2026-04-04 12:00 |
02:03:35.54 |
+29:24:45.5 |
HIP 9739 |
28.84 |
| 2026-04-05 00:00 |
02:04:01.00 |
+29:27:11.2 |
HIP 9739 |
26.70 |
| 2026-04-05 12:00 |
02:04:26.50 |
+29:29:37.3 |
HIP 9644 |
25.43 |
| 2026-04-06 00:00 |
02:04:52.03 |
+29:32:03.7 |
HIP 9644 |
25.12 |
| 2026-04-06 12:00 |
02:05:17.60 |
+29:34:30.5 |
HIP 9644 |
26.24 |
| 2026-04-07 00:00 |
02:05:43.19 |
+29:36:57.6 |
HIP 9858 |
25.27 |
| 2026-04-07 12:00 |
02:06:08.82 |
+29:39:25.1 |
HIP 9914 |
19.90 |
| 2026-04-08 00:00 |
02:06:34.48 |
+29:41:52.9 |
HIP 9914 |
13.91 |
| 2026-04-08 12:00 |
02:07:00.17 |
+29:44:21.1 |
HIP 9914 |
8.09 |
| 2026-04-09 00:00 |
02:07:25.90 |
+29:46:49.6 |
HIP 9914 |
3.42 |
| 2026-04-09 12:00 |
02:07:51.65 |
+29:49:18.5 |
HIP 9914 |
5.72 |
| 2026-04-10 00:00 |
02:08:17.43 |
+29:51:47.6 |
HIP 9914 |
11.34 |
| 2026-04-10 12:00 |
02:08:43.24 |
+29:54:17.2 |
HIP 9914 |
17.31 |
| 2026-04-11 00:00 |
02:09:09.08 |
+29:56:47.0 |
HIP 10140 |
18.33 |
| 2026-04-11 12:00 |
02:09:34.94 |
+29:59:17.2 |
HIP 10140 |
15.24 |
| 2026-04-12 00:00 |
02:10:00.83 |
+30:01:47.7 |
HIP 10169 |
10.32 |
| 2026-04-12 12:00 |
02:10:26.75 |
+30:04:18.5 |
HIP 10169 |
4.32 |
| 2026-04-13 00:00 |
02:10:52.69 |
+30:06:49.6 |
HIP 10169 |
2.50 |
| 2026-04-13 12:00 |
02:11:18.66 |
+30:09:21.0 |
HIP 10199 |
3.23 |
| 2026-04-14 00:00 |
02:11:44.65 |
+30:11:52.7 |
HIP 10199 |
9.21 |
| 2026-04-14 12:00 |
02:12:10.67 |
+30:14:24.8 |
HIP 10280 |
4.54 |
| 2026-04-15 00:00 |
02:12:36.71 |
+30:16:57.1 |
HIP 10280 |
3.34 |
| 2026-04-15 12:00 |
02:13:02.77 |
+30:19:29.7 |
HIP 10280 |
8.83 |
| 2026-04-16 00:00 |
02:13:28.85 |
+30:22:02.7 |
HIP 10334 |
12.21 |