メタデータ
| 項目 |
値 |
| Designation |
C/2019 O3 (Palomar) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-03-08T21:27:10.964160Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:52:49Z |
| Obs used |
2138 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
6.750 |
| PC |
0.030 |
| Discovery observation (MPC, UTC) |
2019-07-26T05:21:28.800000Z |
| Discovery magnitude (MPC) |
19.30 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-03-22.0000000 |
| e |
1.00359769 |
| q (au) |
8.820012 |
| a (au) |
-2451.574872 |
| i (deg) |
89.818764 |
| Ω (om, deg) |
300.392129 |
| ω (w, deg) |
60.096036 |
| M (ma, deg) |
0.003070 |
等級
散乱 + 全体線形
$$
M_a = (-1.506 + 5.405\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
-1.506 |
| n |
5.405 |
| 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) |
| 2026-07-29 00:00 |
09:20:41.93 |
+60:28:51.8 |
HIP 45863 |
5.60 |
| 2026-07-29 12:00 |
09:20:54.92 |
+60:27:38.2 |
HIP 45863 |
3.75 |
| 2026-07-30 00:00 |
09:21:07.92 |
+60:26:25.3 |
HIP 45863 |
2.22 |
| 2026-07-30 12:00 |
09:21:20.93 |
+60:25:12.9 |
HIP 45863 |
1.99 |
| 2026-07-31 00:00 |
09:21:33.94 |
+60:24:01.1 |
HIP 45863 |
3.32 |
| 2026-07-31 12:00 |
09:21:46.96 |
+60:22:49.9 |
HIP 45863 |
5.11 |
| 2026-08-01 00:00 |
09:21:59.99 |
+60:21:39.3 |
HIP 45863 |
7.01 |
| 2026-08-01 12:00 |
09:22:13.02 |
+60:20:29.2 |
HIP 45863 |
8.95 |
| 2026-08-02 00:00 |
09:22:26.05 |
+60:19:19.8 |
HIP 45863 |
10.91 |
| 2026-08-02 12:00 |
09:22:39.08 |
+60:18:11.0 |
HIP 45863 |
12.87 |
| 2026-08-03 00:00 |
09:22:52.12 |
+60:17:02.8 |
HIP 46108 |
13.88 |
| 2026-08-03 12:00 |
09:23:05.16 |
+60:15:55.1 |
HIP 46108 |
13.67 |
| 2026-08-04 00:00 |
09:23:18.19 |
+60:14:48.1 |
HIP 46108 |
13.73 |
| 2026-08-04 12:00 |
09:23:31.23 |
+60:13:41.6 |
HIP 46108 |
14.06 |
| 2026-08-05 00:00 |
09:23:44.27 |
+60:12:35.8 |
HIP 46108 |
14.63 |
| 2026-08-05 12:00 |
09:23:57.31 |
+60:11:30.6 |
HIP 46170 |
14.01 |
| 2026-08-06 00:00 |
09:24:10.34 |
+60:10:26.0 |
HIP 46170 |
12.26 |
| 2026-08-06 12:00 |
09:24:23.37 |
+60:09:22.0 |
HIP 46170 |
10.60 |
| 2026-08-07 00:00 |
09:24:36.40 |
+60:08:18.6 |
HIP 46170 |
9.07 |
| 2026-08-07 12:00 |
09:24:49.42 |
+60:07:15.8 |
HIP 46170 |
7.72 |
| 2026-08-08 00:00 |
09:25:02.44 |
+60:06:13.7 |
HIP 46170 |
6.68 |
| 2026-08-08 12:00 |
09:25:15.46 |
+60:05:12.1 |
HIP 46170 |
6.10 |
| 2026-08-09 00:00 |
09:25:28.46 |
+60:04:11.2 |
HIP 46170 |
6.10 |
| 2026-08-09 12:00 |
09:25:41.46 |
+60:03:10.9 |
HIP 46170 |
6.69 |
| 2026-08-10 00:00 |
09:25:54.46 |
+60:02:11.3 |
HIP 46170 |
7.71 |
| 2026-08-10 12:00 |
09:26:07.44 |
+60:01:12.2 |
HIP 46170 |
9.03 |
| 2026-08-11 00:00 |
09:26:20.41 |
+60:00:13.8 |
HIP 46170 |
10.53 |
| 2026-08-11 12:00 |
09:26:33.38 |
+59:59:16.0 |
HIP 46170 |
12.14 |
| 2026-08-12 00:00 |
09:26:46.33 |
+59:58:18.9 |
HIP 46170 |
13.82 |
| 2026-08-12 12:00 |
09:26:59.27 |
+59:57:22.4 |
HIP 46170 |
15.54 |
| 2026-08-13 00:00 |
09:27:12.20 |
+59:56:26.5 |
HIP 46170 |
17.29 |
| 2026-08-13 12:00 |
09:27:25.11 |
+59:55:31.3 |
HIP 46551 |
17.08 |
| 2026-08-14 00:00 |
09:27:38.01 |
+59:54:36.7 |
HIP 46551 |
15.29 |
| 2026-08-14 12:00 |
09:27:50.90 |
+59:53:42.8 |
HIP 46551 |
13.51 |
| 2026-08-15 00:00 |
09:28:03.77 |
+59:52:49.5 |
HIP 46551 |
11.76 |
| 2026-08-15 12:00 |
09:28:16.62 |
+59:51:56.8 |
HIP 46551 |
10.04 |
| 2026-08-16 00:00 |
09:28:29.46 |
+59:51:04.8 |
HIP 46551 |
8.37 |
| 2026-08-16 12:00 |
09:28:42.28 |
+59:50:13.5 |
HIP 46551 |
6.78 |
| 2026-08-17 00:00 |
09:28:55.07 |
+59:49:22.8 |
HIP 46551 |
5.35 |
| 2026-08-17 12:00 |
09:29:07.85 |
+59:48:32.7 |
HIP 46551 |
4.22 |
| 2026-08-18 00:00 |
09:29:20.61 |
+59:47:43.3 |
HIP 46551 |
3.67 |
| 2026-08-18 12:00 |
09:29:33.35 |
+59:46:54.6 |
HIP 46551 |
3.94 |
| 2026-08-19 00:00 |
09:29:46.07 |
+59:46:06.5 |
HIP 46551 |
4.89 |