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) |
| 2026-03-26 00:00 |
02:08:47.99 |
+03:39:21.8 |
HIP 10099 |
17.20 |
| 2026-03-26 12:00 |
02:08:55.56 |
+03:40:40.4 |
HIP 10099 |
14.96 |
| 2026-03-27 00:00 |
02:09:03.16 |
+03:41:58.8 |
HIP 10099 |
12.73 |
| 2026-03-27 12:00 |
02:09:10.79 |
+03:43:17.2 |
HIP 10099 |
10.52 |
| 2026-03-28 00:00 |
02:09:18.46 |
+03:44:35.5 |
HIP 10099 |
8.35 |
| 2026-03-28 12:00 |
02:09:26.16 |
+03:45:53.7 |
HIP 10099 |
6.29 |
| 2026-03-29 00:00 |
02:09:33.89 |
+03:47:11.8 |
HIP 10099 |
4.48 |
| 2026-03-29 12:00 |
02:09:41.65 |
+03:48:29.8 |
HIP 10099 |
3.36 |
| 2026-03-30 00:00 |
02:09:49.44 |
+03:49:47.6 |
HIP 10099 |
3.66 |
| 2026-03-30 12:00 |
02:09:57.26 |
+03:51:05.4 |
HIP 10099 |
5.14 |
| 2026-03-31 00:00 |
02:10:05.11 |
+03:52:23.0 |
HIP 10099 |
7.11 |
| 2026-03-31 12:00 |
02:10:12.99 |
+03:53:40.6 |
HIP 10099 |
9.25 |
| 2026-04-01 00:00 |
02:10:20.89 |
+03:54:58.0 |
HIP 10099 |
11.48 |
| 2026-04-01 12:00 |
02:10:28.82 |
+03:56:15.3 |
HIP 10099 |
13.76 |
| 2026-04-02 00:00 |
02:10:36.78 |
+03:57:32.4 |
HIP 10099 |
16.06 |
| 2026-04-02 12:00 |
02:10:44.77 |
+03:58:49.5 |
HIP 10099 |
18.38 |
| 2026-04-03 00:00 |
02:10:52.78 |
+04:00:06.4 |
HIP 10099 |
20.72 |
| 2026-04-03 12:00 |
02:11:00.81 |
+04:01:23.1 |
HIP 10099 |
23.07 |
| 2026-04-04 00:00 |
02:11:08.87 |
+04:02:39.8 |
HIP 10258 |
22.65 |
| 2026-04-04 12:00 |
02:11:16.96 |
+04:03:56.3 |
HIP 10258 |
20.51 |
| 2026-04-05 00:00 |
02:11:25.06 |
+04:05:12.6 |
HIP 10258 |
18.44 |
| 2026-04-05 12:00 |
02:11:33.19 |
+04:06:28.8 |
HIP 10258 |
16.44 |
| 2026-04-06 00:00 |
02:11:41.34 |
+04:07:44.9 |
HIP 10258 |
14.57 |
| 2026-04-06 12:00 |
02:11:49.51 |
+04:09:00.8 |
HIP 10258 |
12.87 |
| 2026-04-07 00:00 |
02:11:57.70 |
+04:10:16.6 |
HIP 10258 |
11.43 |
| 2026-04-07 12:00 |
02:12:05.92 |
+04:11:32.2 |
HIP 10258 |
10.36 |
| 2026-04-08 00:00 |
02:12:14.15 |
+04:12:47.7 |
HIP 10258 |
9.77 |
| 2026-04-08 12:00 |
02:12:22.40 |
+04:14:03.0 |
HIP 10258 |
9.77 |
| 2026-04-09 00:00 |
02:12:30.67 |
+04:15:18.1 |
HIP 10327 |
8.14 |
| 2026-04-09 12:00 |
02:12:38.96 |
+04:16:33.1 |
HIP 10327 |
5.89 |
| 2026-04-10 00:00 |
02:12:47.26 |
+04:17:47.9 |
HIP 10327 |
3.84 |
| 2026-04-10 12:00 |
02:12:55.58 |
+04:19:02.6 |
HIP 10327 |
2.54 |
| 2026-04-11 00:00 |
02:13:03.92 |
+04:20:17.0 |
HIP 10327 |
3.13 |
| 2026-04-11 12:00 |
02:13:12.27 |
+04:21:31.3 |
HIP 10327 |
4.99 |
| 2026-04-12 00:00 |
02:13:20.64 |
+04:22:45.4 |
HIP 10327 |
7.19 |
| 2026-04-12 12:00 |
02:13:29.02 |
+04:23:59.4 |
HIP 10327 |
9.50 |
| 2026-04-13 00:00 |
02:13:37.42 |
+04:25:13.1 |
HIP 10327 |
11.86 |
| 2026-04-13 12:00 |
02:13:45.83 |
+04:26:26.7 |
HIP 10327 |
14.24 |
| 2026-04-14 00:00 |
02:13:54.25 |
+04:27:40.0 |
HIP 10327 |
16.64 |
| 2026-04-14 12:00 |
02:14:02.68 |
+04:28:53.2 |
HIP 10327 |
19.04 |
| 2026-04-15 00:00 |
02:14:11.12 |
+04:30:06.2 |
HIP 10345 |
20.32 |
| 2026-04-15 12:00 |
02:14:19.58 |
+04:31:19.0 |
HIP 10345 |
21.00 |
| 2026-04-16 00:00 |
02:14:28.04 |
+04:32:31.5 |
HIP 10345 |
21.94 |