メタデータ
| 項目 |
値 |
| Designation |
C/2023 F1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-06-28T08:27:36.241920Z |
| Orbit solution date (soln_date, UTC) |
2023-06-30T22:17:46Z |
| Obs used |
201 |
| NEO |
- |
| M1 |
10.100 |
| K1 |
30.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2023-03-27T14:17:59.280000Z |
| Discovery magnitude (MPC) |
20.87 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) |
2023-04-17.0000000 |
| e |
0.99353044 |
| q (au) |
1.708139 |
| a (au) |
264.027202 |
| i (deg) |
131.752405 |
| Ω (om, deg) |
25.247504 |
| ω (w, deg) |
216.654855 |
| M (ma, deg) |
359.983378 |
等級
散乱 + 全体線形
$$
M_a = (14.537 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
14.537 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.803 |
| k |
0.996 |
| 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) |
| 2026-05-12 00:00 |
02:21:46.35 |
+05:29:44.9 |
HIP 10957 |
15.15 |
| 2026-05-12 12:00 |
02:21:54.48 |
+05:30:43.3 |
HIP 10957 |
15.82 |
| 2026-05-13 00:00 |
02:22:02.58 |
+05:31:41.5 |
HIP 10957 |
16.77 |
| 2026-05-13 12:00 |
02:22:10.66 |
+05:32:39.3 |
HIP 10957 |
17.95 |
| 2026-05-14 00:00 |
02:22:18.72 |
+05:33:36.8 |
HIP 10957 |
19.31 |
| 2026-05-14 12:00 |
02:22:26.76 |
+05:34:33.9 |
HIP 10957 |
20.82 |
| 2026-05-15 00:00 |
02:22:34.77 |
+05:35:30.8 |
HIP 10957 |
22.44 |
| 2026-05-15 12:00 |
02:22:42.75 |
+05:36:27.3 |
HIP 10957 |
24.14 |
| 2026-05-16 00:00 |
02:22:50.72 |
+05:37:23.4 |
HIP 11132 |
23.30 |
| 2026-05-16 12:00 |
02:22:58.65 |
+05:38:19.2 |
HIP 11132 |
21.96 |
| 2026-05-17 00:00 |
02:23:06.56 |
+05:39:14.7 |
HIP 11132 |
20.76 |
| 2026-05-17 12:00 |
02:23:14.44 |
+05:40:09.8 |
HIP 11132 |
19.74 |
| 2026-05-18 00:00 |
02:23:22.30 |
+05:41:04.6 |
HIP 11132 |
18.92 |
| 2026-05-18 12:00 |
02:23:30.12 |
+05:41:59.0 |
HIP 11132 |
18.32 |
| 2026-05-19 00:00 |
02:23:37.92 |
+05:42:53.1 |
HIP 11132 |
17.97 |
| 2026-05-19 12:00 |
02:23:45.69 |
+05:43:46.8 |
HIP 11132 |
17.86 |
| 2026-05-20 00:00 |
02:23:53.43 |
+05:44:40.2 |
HIP 11132 |
18.01 |
| 2026-05-20 12:00 |
02:24:01.14 |
+05:45:33.2 |
HIP 11132 |
18.41 |
| 2026-05-21 00:00 |
02:24:08.81 |
+05:46:25.9 |
HIP 11132 |
19.03 |
| 2026-05-21 12:00 |
02:24:16.46 |
+05:47:18.2 |
HIP 11132 |
19.85 |
| 2026-05-22 00:00 |
02:24:24.07 |
+05:48:10.2 |
HIP 11132 |
20.84 |
| 2026-05-22 12:00 |
02:24:31.65 |
+05:49:01.7 |
HIP 11132 |
21.99 |
| 2026-05-23 00:00 |
02:24:39.19 |
+05:49:53.0 |
HIP 11349 |
20.72 |
| 2026-05-23 12:00 |
02:24:46.70 |
+05:50:43.8 |
HIP 11349 |
19.03 |
| 2026-05-24 00:00 |
02:24:54.18 |
+05:51:34.3 |
HIP 11349 |
17.43 |
| 2026-05-24 12:00 |
02:25:01.62 |
+05:52:24.4 |
HIP 11349 |
15.94 |
| 2026-05-25 00:00 |
02:25:09.03 |
+05:53:14.2 |
HIP 11349 |
14.58 |
| 2026-05-25 12:00 |
02:25:16.40 |
+05:54:03.6 |
HIP 11349 |
13.39 |
| 2026-05-26 00:00 |
02:25:23.74 |
+05:54:52.6 |
HIP 11349 |
12.42 |
| 2026-05-26 12:00 |
02:25:31.03 |
+05:55:41.2 |
HIP 11349 |
11.71 |
| 2026-05-27 00:00 |
02:25:38.29 |
+05:56:29.5 |
HIP 11349 |
11.32 |
| 2026-05-27 12:00 |
02:25:45.52 |
+05:57:17.4 |
HIP 11349 |
11.25 |
| 2026-05-28 00:00 |
02:25:52.70 |
+05:58:04.9 |
HIP 11349 |
11.53 |
| 2026-05-28 12:00 |
02:25:59.84 |
+05:58:52.1 |
HIP 11349 |
12.11 |
| 2026-05-29 00:00 |
02:26:06.95 |
+05:59:38.8 |
HIP 11349 |
12.95 |
| 2026-05-29 12:00 |
02:26:14.01 |
+06:00:25.2 |
HIP 11349 |
14.00 |
| 2026-05-30 00:00 |
02:26:21.04 |
+06:01:11.2 |
HIP 11349 |
15.21 |
| 2026-05-30 12:00 |
02:26:28.02 |
+06:01:56.8 |
HIP 11411 |
14.60 |
| 2026-05-31 00:00 |
02:26:34.97 |
+06:02:42.1 |
HIP 11411 |
12.99 |
| 2026-05-31 12:00 |
02:26:41.87 |
+06:03:26.9 |
HIP 11411 |
11.47 |
| 2026-06-01 00:00 |
02:26:48.73 |
+06:04:11.4 |
HIP 11411 |
10.09 |
| 2026-06-01 12:00 |
02:26:55.54 |
+06:04:55.5 |
HIP 11411 |
8.89 |
| 2026-06-02 00:00 |
02:27:02.31 |
+06:05:39.1 |
HIP 11411 |
7.95 |