メタデータ
| 項目 |
値 |
| Designation |
P/2022 C3 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-07-01T06:38:07.016640Z |
| Orbit solution date (soln_date, UTC) |
2023-10-29T03:13:09Z |
| Obs used |
123 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
15.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-02-09T14:55:00.796800Z |
| Discovery magnitude (MPC) |
20.92 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2022-04-23.0000000 |
| e |
0.54695784 |
| q (au) |
4.374506 |
| a (au) |
9.655848 |
| i (deg) |
12.815871 |
| Ω (om, deg) |
139.060787 |
| ω (w, deg) |
93.942616 |
| M (ma, deg) |
357.724357 |
等級
散乱 + 全体線形
$$
M_a = (6.867 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
6.867 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-0.864 |
| k |
0.999 |
| 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 |
23:31:01.52 |
-08:46:23.9 |
HIP 116124 |
28.89 |
| 2026-05-12 12:00 |
23:31:11.74 |
-08:45:48.5 |
HIP 116124 |
27.46 |
| 2026-05-13 00:00 |
23:31:21.89 |
-08:45:13.7 |
HIP 116124 |
26.22 |
| 2026-05-13 12:00 |
23:31:31.96 |
-08:44:39.5 |
HIP 116124 |
25.20 |
| 2026-05-14 00:00 |
23:31:41.95 |
-08:44:05.9 |
HIP 116124 |
24.41 |
| 2026-05-14 12:00 |
23:31:51.86 |
-08:43:32.9 |
HIP 116124 |
23.87 |
| 2026-05-15 00:00 |
23:32:01.70 |
-08:43:00.5 |
HIP 116124 |
23.60 |
| 2026-05-15 12:00 |
23:32:11.45 |
-08:42:28.7 |
HIP 116124 |
23.59 |
| 2026-05-16 00:00 |
23:32:21.12 |
-08:41:57.5 |
HIP 116124 |
23.84 |
| 2026-05-16 12:00 |
23:32:30.71 |
-08:41:26.9 |
HIP 116124 |
24.34 |
| 2026-05-17 00:00 |
23:32:40.22 |
-08:40:56.9 |
HIP 116124 |
25.06 |
| 2026-05-17 12:00 |
23:32:49.65 |
-08:40:27.6 |
HIP 116124 |
25.98 |
| 2026-05-18 00:00 |
23:32:59.00 |
-08:39:58.9 |
HIP 116124 |
27.08 |
| 2026-05-18 12:00 |
23:33:08.26 |
-08:39:30.8 |
HIP 116124 |
28.32 |
| 2026-05-19 00:00 |
23:33:17.44 |
-08:39:03.3 |
HIP 116124 |
29.68 |
| 2026-05-19 12:00 |
23:33:26.53 |
-08:38:36.5 |
HIP 116124 |
31.15 |
| 2026-05-20 00:00 |
23:33:35.54 |
-08:38:10.3 |
HIP 116124 |
32.70 |
| 2026-05-20 12:00 |
23:33:44.47 |
-08:37:44.7 |
HIP 116226 |
34.00 |
| 2026-05-21 00:00 |
23:33:53.31 |
-08:37:19.8 |
HIP 116470 |
32.54 |
| 2026-05-21 12:00 |
23:34:02.07 |
-08:36:55.5 |
HIP 116470 |
30.58 |
| 2026-05-22 00:00 |
23:34:10.74 |
-08:36:31.8 |
HIP 116470 |
28.67 |
| 2026-05-22 12:00 |
23:34:19.32 |
-08:36:08.8 |
HIP 116470 |
26.81 |
| 2026-05-23 00:00 |
23:34:27.82 |
-08:35:46.4 |
HIP 116470 |
25.02 |
| 2026-05-23 12:00 |
23:34:36.23 |
-08:35:24.7 |
HIP 116470 |
23.30 |
| 2026-05-24 00:00 |
23:34:44.56 |
-08:35:03.6 |
HIP 116470 |
21.66 |
| 2026-05-24 12:00 |
23:34:52.79 |
-08:34:43.1 |
HIP 116470 |
20.11 |
| 2026-05-25 00:00 |
23:35:00.94 |
-08:34:23.3 |
HIP 116470 |
18.68 |
| 2026-05-25 12:00 |
23:35:09.00 |
-08:34:04.2 |
HIP 116470 |
17.38 |
| 2026-05-26 00:00 |
23:35:16.98 |
-08:33:45.7 |
HIP 116470 |
16.23 |
| 2026-05-26 12:00 |
23:35:24.86 |
-08:33:27.8 |
HIP 116470 |
15.26 |
| 2026-05-27 00:00 |
23:35:32.65 |
-08:33:10.6 |
HIP 116470 |
14.49 |
| 2026-05-27 12:00 |
23:35:40.36 |
-08:32:54.1 |
HIP 116470 |
13.96 |
| 2026-05-28 00:00 |
23:35:47.98 |
-08:32:38.2 |
HIP 116470 |
13.67 |
| 2026-05-28 12:00 |
23:35:55.50 |
-08:32:23.0 |
HIP 116470 |
13.63 |
| 2026-05-29 00:00 |
23:36:02.94 |
-08:32:08.4 |
HIP 116470 |
13.84 |
| 2026-05-29 12:00 |
23:36:10.28 |
-08:31:54.5 |
HIP 116470 |
14.27 |
| 2026-05-30 00:00 |
23:36:17.54 |
-08:31:41.3 |
HIP 116470 |
14.90 |
| 2026-05-30 12:00 |
23:36:24.70 |
-08:31:28.7 |
HIP 116470 |
15.69 |
| 2026-05-31 00:00 |
23:36:31.77 |
-08:31:16.8 |
HIP 116470 |
16.62 |
| 2026-05-31 12:00 |
23:36:38.75 |
-08:31:05.6 |
HIP 116470 |
17.65 |
| 2026-06-01 00:00 |
23:36:45.63 |
-08:30:55.0 |
HIP 116470 |
18.77 |
| 2026-06-01 12:00 |
23:36:52.43 |
-08:30:45.1 |
HIP 116470 |
19.94 |
| 2026-06-02 00:00 |
23:36:59.13 |
-08:30:35.8 |
HIP 116639 |
19.43 |