メタデータ
| 項目 |
値 |
| Designation |
P/2022 C1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-11-04T08:47:01.587840Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:43:58Z |
| Obs used |
61 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-02-03T07:57:07.516800Z |
| Discovery magnitude (MPC) |
20.85 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) |
2022-02-23.0000000 |
| e |
0.44770397 |
| q (au) |
3.985559 |
| a (au) |
7.216346 |
| i (deg) |
4.762986 |
| Ω (om, deg) |
113.151420 |
| ω (w, deg) |
9.340297 |
| M (ma, deg) |
5.624924 |
等級
散乱 + 全体線形
$$
M_a = (18.330 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
18.330 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.738 |
| k |
0.800 |
| 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 |
16:41:18.10 |
-19:08:36.0 |
HIP 81758 |
15.47 |
| 2026-07-29 12:00 |
16:41:13.64 |
-19:08:41.4 |
HIP 81758 |
16.20 |
| 2026-07-30 00:00 |
16:41:09.30 |
-19:08:47.0 |
HIP 81758 |
16.94 |
| 2026-07-30 12:00 |
16:41:05.08 |
-19:08:52.9 |
HIP 81758 |
17.70 |
| 2026-07-31 00:00 |
16:41:00.97 |
-19:08:59.0 |
HIP 81758 |
18.47 |
| 2026-07-31 12:00 |
16:40:56.98 |
-19:09:05.4 |
HIP 81758 |
19.23 |
| 2026-08-01 00:00 |
16:40:53.11 |
-19:09:12.0 |
HIP 81758 |
19.99 |
| 2026-08-01 12:00 |
16:40:49.36 |
-19:09:18.9 |
HIP 81758 |
20.75 |
| 2026-08-02 00:00 |
16:40:45.72 |
-19:09:26.0 |
HIP 81758 |
21.50 |
| 2026-08-02 12:00 |
16:40:42.20 |
-19:09:33.4 |
HIP 81758 |
22.23 |
| 2026-08-03 00:00 |
16:40:38.80 |
-19:09:41.0 |
HIP 81758 |
22.96 |
| 2026-08-03 12:00 |
16:40:35.51 |
-19:09:48.9 |
HIP 81758 |
23.67 |
| 2026-08-04 00:00 |
16:40:32.35 |
-19:09:57.0 |
HIP 81758 |
24.36 |
| 2026-08-04 12:00 |
16:40:29.30 |
-19:10:05.3 |
HIP 81758 |
25.03 |
| 2026-08-05 00:00 |
16:40:26.37 |
-19:10:13.9 |
HIP 81758 |
25.69 |
| 2026-08-05 12:00 |
16:40:23.57 |
-19:10:22.8 |
HIP 81758 |
26.33 |
| 2026-08-06 00:00 |
16:40:20.88 |
-19:10:31.9 |
HIP 81758 |
26.95 |
| 2026-08-06 12:00 |
16:40:18.31 |
-19:10:41.2 |
HIP 81758 |
27.54 |
| 2026-08-07 00:00 |
16:40:15.87 |
-19:10:50.8 |
HIP 81758 |
28.12 |
| 2026-08-07 12:00 |
16:40:13.54 |
-19:11:00.7 |
HIP 81758 |
28.68 |
| 2026-08-08 00:00 |
16:40:11.34 |
-19:11:10.8 |
HIP 81758 |
29.21 |
| 2026-08-08 12:00 |
16:40:09.25 |
-19:11:21.1 |
HIP 81758 |
29.72 |
| 2026-08-09 00:00 |
16:40:07.29 |
-19:11:31.7 |
HIP 81758 |
30.21 |
| 2026-08-09 12:00 |
16:40:05.45 |
-19:11:42.5 |
HIP 81758 |
30.68 |
| 2026-08-10 00:00 |
16:40:03.73 |
-19:11:53.6 |
HIP 81486 |
30.69 |
| 2026-08-10 12:00 |
16:40:02.13 |
-19:12:04.9 |
HIP 81486 |
30.57 |
| 2026-08-11 00:00 |
16:40:00.66 |
-19:12:16.5 |
HIP 81486 |
30.48 |
| 2026-08-11 12:00 |
16:39:59.30 |
-19:12:28.3 |
HIP 81486 |
30.42 |
| 2026-08-12 00:00 |
16:39:58.07 |
-19:12:40.4 |
HIP 81486 |
30.38 |
| 2026-08-12 12:00 |
16:39:56.97 |
-19:12:52.7 |
HIP 81486 |
30.37 |
| 2026-08-13 00:00 |
16:39:55.98 |
-19:13:05.2 |
HIP 81486 |
30.38 |
| 2026-08-13 12:00 |
16:39:55.12 |
-19:13:18.0 |
HIP 81486 |
30.42 |
| 2026-08-14 00:00 |
16:39:54.38 |
-19:13:31.1 |
HIP 81486 |
30.48 |
| 2026-08-14 12:00 |
16:39:53.77 |
-19:13:44.3 |
HIP 81486 |
30.57 |
| 2026-08-15 00:00 |
16:39:53.27 |
-19:13:57.8 |
HIP 81486 |
30.67 |
| 2026-08-15 12:00 |
16:39:52.90 |
-19:14:11.6 |
HIP 81486 |
30.80 |
| 2026-08-16 00:00 |
16:39:52.66 |
-19:14:25.6 |
HIP 81486 |
30.96 |
| 2026-08-16 12:00 |
16:39:52.53 |
-19:14:39.8 |
HIP 81486 |
31.13 |
| 2026-08-17 00:00 |
16:39:52.53 |
-19:14:54.2 |
HIP 81486 |
31.32 |
| 2026-08-17 12:00 |
16:39:52.65 |
-19:15:08.9 |
HIP 81486 |
31.54 |
| 2026-08-18 00:00 |
16:39:52.89 |
-19:15:23.9 |
HIP 81486 |
31.77 |
| 2026-08-18 12:00 |
16:39:53.26 |
-19:15:39.0 |
HIP 81486 |
32.03 |
| 2026-08-19 00:00 |
16:39:53.75 |
-19:15:54.4 |
HIP 81486 |
32.31 |