P/2020 O3 (PANSTARRS)
メタデータ
| 項目 |
値 |
| Designation |
P/2020 O3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-01-27T20:38:44.139840Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:22Z |
| Obs used |
71 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-07-28T12:07:34.118400Z |
| Discovery magnitude (MPC) |
21.08 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) |
2020-08-19.0000000 |
| e |
0.10611991 |
| q (au) |
4.167207 |
| a (au) |
4.661931 |
| i (deg) |
8.442690 |
| Ω (om, deg) |
266.895744 |
| ω (w, deg) |
81.214576 |
| M (ma, deg) |
344.151234 |
等級
散乱 + 全体線形
$$
M_a = (15.241 + 2.001\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
15.241 |
| n |
2.001 |
| gf |
0.901 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
1.000 |
| 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) |
| 2026-02-03 00:00 |
11:29:04.67 |
-07:22:24.2 |
HIP 55969 |
14.31 |
| 2026-02-03 12:00 |
11:28:54.98 |
-07:22:13.1 |
HIP 55969 |
11.98 |
| 2026-02-04 00:00 |
11:28:45.13 |
-07:22:00.6 |
HIP 55969 |
9.65 |
| 2026-02-04 12:00 |
11:28:35.13 |
-07:21:46.6 |
HIP 55969 |
7.36 |
| 2026-02-05 00:00 |
11:28:24.98 |
-07:21:31.3 |
HIP 55969 |
5.21 |
| 2026-02-05 12:00 |
11:28:14.67 |
-07:21:14.5 |
HIP 55969 |
3.55 |
| 2026-02-06 00:00 |
11:28:04.21 |
-07:20:56.4 |
HIP 55969 |
3.36 |
| 2026-02-06 12:00 |
11:27:53.60 |
-07:20:36.8 |
HIP 55969 |
4.88 |
| 2026-02-07 00:00 |
11:27:42.84 |
-07:20:15.9 |
HIP 55969 |
7.12 |
| 2026-02-07 12:00 |
11:27:31.93 |
-07:19:53.5 |
HIP 55969 |
9.63 |
| 2026-02-08 00:00 |
11:27:20.87 |
-07:19:29.7 |
HIP 55969 |
12.27 |
| 2026-02-08 12:00 |
11:27:09.68 |
-07:19:04.6 |
HIP 55969 |
14.99 |
| 2026-02-09 00:00 |
11:26:58.34 |
-07:18:38.0 |
HIP 55969 |
17.77 |
| 2026-02-09 12:00 |
11:26:46.85 |
-07:18:10.1 |
HIP 55804 |
16.66 |
| 2026-02-10 00:00 |
11:26:35.23 |
-07:17:40.7 |
HIP 55804 |
15.41 |
| 2026-02-10 12:00 |
11:26:23.47 |
-07:17:10.0 |
HIP 55804 |
14.66 |
| 2026-02-11 00:00 |
11:26:11.58 |
-07:16:37.9 |
HIP 55804 |
14.51 |
| 2026-02-11 12:00 |
11:25:59.55 |
-07:16:04.4 |
HIP 55804 |
14.99 |
| 2026-02-12 00:00 |
11:25:47.39 |
-07:15:29.6 |
HIP 55804 |
16.07 |
| 2026-02-12 12:00 |
11:25:35.10 |
-07:14:53.4 |
HIP 55804 |
17.66 |
| 2026-02-13 00:00 |
11:25:22.69 |
-07:14:15.8 |
HIP 55804 |
19.65 |
| 2026-02-13 12:00 |
11:25:10.14 |
-07:13:36.9 |
HIP 55635 |
20.09 |
| 2026-02-14 00:00 |
11:24:57.47 |
-07:12:56.6 |
HIP 55635 |
16.88 |
| 2026-02-14 12:00 |
11:24:44.68 |
-07:12:14.9 |
HIP 55635 |
13.64 |
| 2026-02-15 00:00 |
11:24:31.78 |
-07:11:32.0 |
HIP 55635 |
10.36 |
| 2026-02-15 12:00 |
11:24:18.75 |
-07:10:47.7 |
HIP 55635 |
7.05 |
| 2026-02-16 00:00 |
11:24:05.61 |
-07:10:02.0 |
HIP 55635 |
3.71 |
| 2026-02-16 12:00 |
11:23:52.35 |
-07:09:15.1 |
HIP 55635 |
0.46 |
| 2026-02-17 00:00 |
11:23:38.99 |
-07:08:26.8 |
HIP 55635 |
3.11 |
| 2026-02-17 12:00 |
11:23:25.51 |
-07:07:37.3 |
HIP 55635 |
6.55 |
| 2026-02-18 00:00 |
11:23:11.94 |
-07:06:46.4 |
HIP 55635 |
10.02 |
| 2026-02-18 12:00 |
11:22:58.25 |
-07:05:54.3 |
HIP 55635 |
13.52 |
| 2026-02-19 00:00 |
11:22:44.47 |
-07:05:00.9 |
HIP 55635 |
17.05 |
| 2026-02-19 12:00 |
11:22:30.59 |
-07:04:06.2 |
HIP 55635 |
20.61 |
| 2026-02-20 00:00 |
11:22:16.61 |
-07:03:10.3 |
HIP 55635 |
24.20 |
| 2026-02-20 12:00 |
11:22:02.54 |
-07:02:13.2 |
HIP 55635 |
27.82 |
| 2026-02-21 00:00 |
11:21:48.38 |
-07:01:14.8 |
HIP 55635 |
31.46 |
| 2026-02-21 12:00 |
11:21:34.13 |
-07:00:15.2 |
HIP 55322 |
28.06 |
| 2026-02-22 00:00 |
11:21:19.79 |
-06:59:14.4 |
HIP 55322 |
24.37 |
| 2026-02-22 12:00 |
11:21:05.37 |
-06:58:12.4 |
HIP 55322 |
20.65 |
| 2026-02-23 00:00 |
11:20:50.88 |
-06:57:09.2 |
HIP 55322 |
16.92 |
| 2026-02-23 12:00 |
11:20:36.30 |
-06:56:04.8 |
HIP 55322 |
13.17 |
| 2026-02-24 00:00 |
11:20:21.65 |
-06:54:59.3 |
HIP 55322 |
9.41 |