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) |
| 2026-09-20 00:00 |
16:44:28.82 |
-19:39:12.6 |
HIP 82038 |
34.20 |
| 2026-09-20 12:00 |
16:44:36.72 |
-19:39:39.6 |
HIP 82038 |
33.88 |
| 2026-09-21 00:00 |
16:44:44.71 |
-19:40:06.8 |
HIP 82038 |
33.65 |
| 2026-09-21 12:00 |
16:44:52.81 |
-19:40:34.1 |
HIP 82038 |
33.53 |
| 2026-09-22 00:00 |
16:45:01.00 |
-19:41:01.5 |
HIP 82038 |
33.52 |
| 2026-09-22 12:00 |
16:45:09.30 |
-19:41:29.1 |
HIP 82038 |
33.63 |
| 2026-09-23 00:00 |
16:45:17.69 |
-19:41:56.7 |
HIP 82149 |
33.68 |
| 2026-09-23 12:00 |
16:45:26.19 |
-19:42:24.4 |
HIP 82149 |
31.98 |
| 2026-09-24 00:00 |
16:45:34.78 |
-19:42:52.2 |
HIP 82149 |
30.31 |
| 2026-09-24 12:00 |
16:45:43.47 |
-19:43:20.2 |
HIP 82149 |
28.68 |
| 2026-09-25 00:00 |
16:45:52.26 |
-19:43:48.2 |
HIP 82149 |
27.10 |
| 2026-09-25 12:00 |
16:46:01.14 |
-19:44:16.3 |
HIP 82149 |
25.58 |
| 2026-09-26 00:00 |
16:46:10.12 |
-19:44:44.5 |
HIP 82149 |
24.14 |
| 2026-09-26 12:00 |
16:46:19.19 |
-19:45:12.8 |
HIP 82218 |
21.99 |
| 2026-09-27 00:00 |
16:46:28.36 |
-19:45:41.2 |
HIP 82218 |
19.80 |
| 2026-09-27 12:00 |
16:46:37.63 |
-19:46:09.7 |
HIP 82218 |
17.59 |
| 2026-09-28 00:00 |
16:46:46.99 |
-19:46:38.3 |
HIP 82218 |
15.37 |
| 2026-09-28 12:00 |
16:46:56.44 |
-19:47:06.9 |
HIP 82218 |
13.14 |
| 2026-09-29 00:00 |
16:47:05.98 |
-19:47:35.7 |
HIP 82218 |
10.91 |
| 2026-09-29 12:00 |
16:47:15.62 |
-19:48:04.5 |
HIP 82218 |
8.69 |
| 2026-09-30 00:00 |
16:47:25.35 |
-19:48:33.4 |
HIP 82218 |
6.52 |
| 2026-09-30 12:00 |
16:47:35.17 |
-19:49:02.3 |
HIP 82218 |
4.51 |
| 2026-10-01 00:00 |
16:47:45.09 |
-19:49:31.4 |
HIP 82218 |
3.05 |
| 2026-10-01 12:00 |
16:47:55.09 |
-19:50:00.5 |
HIP 82218 |
3.11 |
| 2026-10-02 00:00 |
16:48:05.19 |
-19:50:29.6 |
HIP 82218 |
4.66 |
| 2026-10-02 12:00 |
16:48:15.37 |
-19:50:58.9 |
HIP 82218 |
6.77 |
| 2026-10-03 00:00 |
16:48:25.65 |
-19:51:28.2 |
HIP 82218 |
9.07 |
| 2026-10-03 12:00 |
16:48:36.01 |
-19:51:57.6 |
HIP 82218 |
11.46 |
| 2026-10-04 00:00 |
16:48:46.46 |
-19:52:27.0 |
HIP 82218 |
13.90 |
| 2026-10-04 12:00 |
16:48:57.00 |
-19:52:56.5 |
HIP 82218 |
16.38 |
| 2026-10-05 00:00 |
16:49:07.63 |
-19:53:26.0 |
HIP 82307 |
17.05 |
| 2026-10-05 12:00 |
16:49:18.35 |
-19:53:55.6 |
HIP 82307 |
17.93 |
| 2026-10-06 00:00 |
16:49:29.15 |
-19:54:25.3 |
HIP 82307 |
19.13 |
| 2026-10-06 12:00 |
16:49:40.04 |
-19:54:55.0 |
HIP 82443 |
18.39 |
| 2026-10-07 00:00 |
16:49:51.01 |
-19:55:24.7 |
HIP 82443 |
16.06 |
| 2026-10-07 12:00 |
16:50:02.07 |
-19:55:54.5 |
HIP 82443 |
13.82 |
| 2026-10-08 00:00 |
16:50:13.21 |
-19:56:24.3 |
HIP 82443 |
11.73 |
| 2026-10-08 12:00 |
16:50:24.44 |
-19:56:54.2 |
HIP 82443 |
9.91 |
| 2026-10-09 00:00 |
16:50:35.75 |
-19:57:24.1 |
HIP 82443 |
8.55 |
| 2026-10-09 12:00 |
16:50:47.14 |
-19:57:54.0 |
HIP 82443 |
7.91 |
| 2026-10-10 00:00 |
16:50:58.62 |
-19:58:24.0 |
HIP 82443 |
8.17 |
| 2026-10-10 12:00 |
16:51:10.18 |
-19:58:54.0 |
HIP 82443 |
9.29 |
| 2026-10-11 00:00 |
16:51:21.82 |
-19:59:24.0 |
HIP 82443 |
11.01 |