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 |
0.999 |
| gb |
-0.626 |
| 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 |
09:09:38.55 |
+68:30:27.9 |
HIP 44683 |
18.38 |
| 2026-03-26 12:00 |
09:09:20.85 |
+68:28:43.0 |
HIP 44683 |
16.50 |
| 2026-03-27 00:00 |
09:09:03.38 |
+68:26:57.4 |
HIP 44683 |
14.79 |
| 2026-03-27 12:00 |
09:08:46.12 |
+68:25:11.1 |
HIP 44683 |
13.30 |
| 2026-03-28 00:00 |
09:08:29.09 |
+68:23:24.0 |
HIP 44683 |
12.11 |
| 2026-03-28 12:00 |
09:08:12.28 |
+68:21:36.3 |
HIP 44683 |
11.32 |
| 2026-03-29 00:00 |
09:07:55.69 |
+68:19:47.9 |
HIP 44683 |
11.02 |
| 2026-03-29 12:00 |
09:07:39.32 |
+68:17:58.7 |
HIP 44683 |
11.24 |
| 2026-03-30 00:00 |
09:07:23.17 |
+68:16:09.0 |
HIP 44683 |
11.95 |
| 2026-03-30 12:00 |
09:07:07.25 |
+68:14:18.5 |
HIP 44645 |
10.95 |
| 2026-03-31 00:00 |
09:06:51.55 |
+68:12:27.4 |
HIP 44645 |
8.60 |
| 2026-03-31 12:00 |
09:06:36.06 |
+68:10:35.7 |
HIP 44645 |
6.26 |
| 2026-04-01 00:00 |
09:06:20.80 |
+68:08:43.3 |
HIP 44645 |
3.94 |
| 2026-04-01 12:00 |
09:06:05.77 |
+68:06:50.3 |
HIP 44645 |
1.71 |
| 2026-04-02 00:00 |
09:05:50.95 |
+68:04:56.7 |
HIP 44645 |
1.18 |
| 2026-04-02 12:00 |
09:05:36.35 |
+68:03:02.5 |
HIP 44645 |
3.29 |
| 2026-04-03 00:00 |
09:05:21.98 |
+68:01:07.7 |
HIP 44645 |
5.59 |
| 2026-04-03 12:00 |
09:05:07.83 |
+67:59:12.3 |
HIP 44645 |
7.91 |
| 2026-04-04 00:00 |
09:04:53.90 |
+67:57:16.4 |
HIP 44645 |
10.24 |
| 2026-04-04 12:00 |
09:04:40.19 |
+67:55:19.8 |
HIP 44645 |
12.57 |
| 2026-04-05 00:00 |
09:04:26.70 |
+67:53:22.8 |
HIP 44645 |
14.89 |
| 2026-04-05 12:00 |
09:04:13.43 |
+67:51:25.2 |
HIP 44390 |
16.65 |
| 2026-04-06 00:00 |
09:04:00.39 |
+67:49:27.1 |
HIP 44390 |
14.33 |
| 2026-04-06 12:00 |
09:03:47.56 |
+67:47:28.4 |
HIP 44390 |
12.02 |
| 2026-04-07 00:00 |
09:03:34.95 |
+67:45:29.2 |
HIP 44390 |
9.71 |
| 2026-04-07 12:00 |
09:03:22.57 |
+67:43:29.6 |
HIP 44390 |
7.42 |
| 2026-04-08 00:00 |
09:03:10.40 |
+67:41:29.4 |
HIP 44390 |
5.16 |
| 2026-04-08 12:00 |
09:02:58.45 |
+67:39:28.8 |
HIP 44390 |
2.98 |
| 2026-04-09 00:00 |
09:02:46.72 |
+67:37:27.6 |
HIP 44390 |
1.37 |
| 2026-04-09 12:00 |
09:02:35.21 |
+67:35:26.1 |
HIP 44390 |
2.35 |
| 2026-04-10 00:00 |
09:02:23.92 |
+67:33:24.0 |
HIP 44390 |
4.45 |
| 2026-04-10 12:00 |
09:02:12.85 |
+67:31:21.6 |
HIP 44390 |
6.69 |
| 2026-04-11 00:00 |
09:02:01.99 |
+67:29:18.6 |
HIP 44390 |
8.96 |
| 2026-04-11 12:00 |
09:01:51.35 |
+67:27:15.3 |
HIP 44390 |
11.24 |
| 2026-04-12 00:00 |
09:01:40.93 |
+67:25:11.5 |
HIP 44390 |
13.52 |
| 2026-04-12 12:00 |
09:01:30.72 |
+67:23:07.4 |
HIP 44390 |
15.81 |
| 2026-04-13 00:00 |
09:01:20.73 |
+67:21:02.8 |
HIP 44390 |
18.09 |
| 2026-04-13 12:00 |
09:01:10.95 |
+67:18:57.8 |
HIP 44112 |
19.02 |
| 2026-04-14 00:00 |
09:01:01.39 |
+67:16:52.5 |
HIP 44112 |
16.84 |
| 2026-04-14 12:00 |
09:00:52.04 |
+67:14:46.8 |
HIP 44112 |
14.71 |
| 2026-04-15 00:00 |
09:00:42.91 |
+67:12:40.7 |
HIP 44112 |
12.65 |
| 2026-04-15 12:00 |
09:00:33.99 |
+67:10:34.3 |
HIP 44112 |
10.68 |
| 2026-04-16 00:00 |
09:00:25.28 |
+67:08:27.6 |
HIP 44112 |
8.87 |