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
$$
M_a = (13.463 + 2.815\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.463 |
| n |
2.815 |
| gf |
0.999 |
| 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) |
| 2026-07-29 00:00 |
03:34:57.36 |
+40:00:14.0 |
HIP 16591 |
16.98 |
| 2026-07-29 12:00 |
03:35:12.78 |
+40:03:04.3 |
HIP 16591 |
20.82 |
| 2026-07-30 00:00 |
03:35:28.05 |
+40:05:54.5 |
HIP 16897 |
22.04 |
| 2026-07-30 12:00 |
03:35:43.19 |
+40:08:44.7 |
HIP 16897 |
19.43 |
| 2026-07-31 00:00 |
03:35:58.18 |
+40:11:34.9 |
HIP 16897 |
17.40 |
| 2026-07-31 12:00 |
03:36:13.04 |
+40:14:24.9 |
HIP 16897 |
16.17 |
| 2026-08-01 00:00 |
03:36:27.74 |
+40:17:14.9 |
HIP 16897 |
15.91 |
| 2026-08-01 12:00 |
03:36:42.30 |
+40:20:04.9 |
HIP 16894 |
14.40 |
| 2026-08-02 00:00 |
03:36:56.72 |
+40:22:54.8 |
HIP 16894 |
10.58 |
| 2026-08-02 12:00 |
03:37:10.99 |
+40:25:44.6 |
HIP 16894 |
6.90 |
| 2026-08-03 00:00 |
03:37:25.11 |
+40:28:34.3 |
HIP 16894 |
3.75 |
| 2026-08-03 12:00 |
03:37:39.08 |
+40:31:24.0 |
HIP 16894 |
3.28 |
| 2026-08-04 00:00 |
03:37:52.90 |
+40:34:13.6 |
HIP 16894 |
6.10 |
| 2026-08-04 12:00 |
03:38:06.56 |
+40:37:03.1 |
HIP 16894 |
9.63 |
| 2026-08-05 00:00 |
03:38:20.08 |
+40:39:52.5 |
HIP 16920 |
8.89 |
| 2026-08-05 12:00 |
03:38:33.44 |
+40:42:41.8 |
HIP 16920 |
9.66 |
| 2026-08-06 00:00 |
03:38:46.64 |
+40:45:31.1 |
HIP 16920 |
11.64 |
| 2026-08-06 12:00 |
03:38:59.69 |
+40:48:20.2 |
HIP 16920 |
14.32 |
| 2026-08-07 00:00 |
03:39:12.58 |
+40:51:09.3 |
HIP 16920 |
17.37 |
| 2026-08-07 12:00 |
03:39:25.31 |
+40:53:58.3 |
HIP 16920 |
20.61 |
| 2026-08-08 00:00 |
03:39:37.88 |
+40:56:47.1 |
HIP 17196 |
20.70 |
| 2026-08-08 12:00 |
03:39:50.29 |
+40:59:35.9 |
HIP 17196 |
17.06 |
| 2026-08-09 00:00 |
03:40:02.53 |
+41:02:24.5 |
HIP 17196 |
13.46 |
| 2026-08-09 12:00 |
03:40:14.61 |
+41:05:13.1 |
HIP 17196 |
9.91 |
| 2026-08-10 00:00 |
03:40:26.53 |
+41:08:01.5 |
HIP 17196 |
6.47 |
| 2026-08-10 12:00 |
03:40:38.28 |
+41:10:49.8 |
HIP 17196 |
3.39 |
| 2026-08-11 00:00 |
03:40:49.86 |
+41:13:37.9 |
HIP 17196 |
2.60 |
| 2026-08-11 12:00 |
03:41:01.27 |
+41:16:26.0 |
HIP 17196 |
5.21 |
| 2026-08-12 00:00 |
03:41:12.51 |
+41:19:13.9 |
HIP 17196 |
8.49 |
| 2026-08-12 12:00 |
03:41:23.58 |
+41:22:01.6 |
HIP 17196 |
11.89 |
| 2026-08-13 00:00 |
03:41:34.48 |
+41:24:49.3 |
HIP 17196 |
15.31 |
| 2026-08-13 12:00 |
03:41:45.21 |
+41:27:36.7 |
HIP 17196 |
18.72 |
| 2026-08-14 00:00 |
03:41:55.76 |
+41:30:24.0 |
HIP 17196 |
22.13 |
| 2026-08-14 12:00 |
03:42:06.13 |
+41:33:11.2 |
HIP 17189 |
22.42 |
| 2026-08-15 00:00 |
03:42:16.33 |
+41:35:58.2 |
HIP 17189 |
21.72 |
| 2026-08-15 12:00 |
03:42:26.35 |
+41:38:45.0 |
HIP 17189 |
21.50 |
| 2026-08-16 00:00 |
03:42:36.19 |
+41:41:31.6 |
HIP 17189 |
21.77 |
| 2026-08-16 12:00 |
03:42:45.85 |
+41:44:18.1 |
HIP 17189 |
22.49 |
| 2026-08-17 00:00 |
03:42:55.33 |
+41:47:04.4 |
HIP 17189 |
23.63 |
| 2026-08-17 12:00 |
03:43:04.62 |
+41:49:50.5 |
HIP 17189 |
25.11 |
| 2026-08-18 00:00 |
03:43:13.74 |
+41:52:36.4 |
HIP 17549 |
26.70 |
| 2026-08-18 12:00 |
03:43:22.67 |
+41:55:22.1 |
HIP 17549 |
24.39 |
| 2026-08-19 00:00 |
03:43:31.42 |
+41:58:07.6 |
HIP 17549 |
22.35 |