メタデータ
| 項目 |
値 |
| Designation |
C/2022 S5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-11-27T11:05:05.619840Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:43:35Z |
| Obs used |
100 |
| NEO |
- |
| M1 |
12.600 |
| K1 |
17.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-24T12:06:49.190400Z |
| Discovery magnitude (MPC) |
19.57 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) |
2022-10-08.0000000 |
| e |
0.89345955 |
| q (au) |
2.178764 |
| a (au) |
20.450111 |
| i (deg) |
136.530929 |
| Ω (om, deg) |
214.856203 |
| ω (w, deg) |
232.775257 |
| M (ma, deg) |
359.462196 |
等級
散乱 + 全体線形
$$
M_a = (12.631 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.631 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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 |
13:54:41.00 |
-08:06:48.2 |
HIP 67953 |
5.39 |
| 2026-05-12 12:00 |
13:54:28.68 |
-08:05:16.5 |
HIP 67953 |
7.54 |
| 2026-05-13 00:00 |
13:54:16.42 |
-08:03:45.3 |
HIP 67953 |
10.37 |
| 2026-05-13 12:00 |
13:54:04.22 |
-08:02:14.4 |
HIP 67953 |
13.45 |
| 2026-05-14 00:00 |
13:53:52.07 |
-08:00:44.0 |
HIP 67953 |
16.63 |
| 2026-05-14 12:00 |
13:53:39.98 |
-07:59:13.9 |
HIP 67953 |
19.86 |
| 2026-05-15 00:00 |
13:53:27.94 |
-07:57:44.3 |
HIP 67718 |
17.54 |
| 2026-05-15 12:00 |
13:53:15.96 |
-07:56:15.1 |
HIP 67718 |
14.26 |
| 2026-05-16 00:00 |
13:53:04.04 |
-07:54:46.3 |
HIP 67718 |
11.01 |
| 2026-05-16 12:00 |
13:52:52.18 |
-07:53:18.0 |
HIP 67718 |
7.83 |
| 2026-05-17 00:00 |
13:52:40.38 |
-07:51:50.0 |
HIP 67718 |
4.80 |
| 2026-05-17 12:00 |
13:52:28.65 |
-07:50:22.6 |
HIP 67718 |
2.49 |
| 2026-05-18 00:00 |
13:52:16.97 |
-07:48:55.5 |
HIP 67718 |
3.23 |
| 2026-05-18 12:00 |
13:52:05.37 |
-07:47:29.0 |
HIP 67718 |
5.95 |
| 2026-05-19 00:00 |
13:51:53.82 |
-07:46:02.9 |
HIP 67718 |
8.98 |
| 2026-05-19 12:00 |
13:51:42.34 |
-07:44:37.2 |
HIP 67718 |
12.09 |
| 2026-05-20 00:00 |
13:51:30.93 |
-07:43:12.0 |
HIP 67578 |
10.66 |
| 2026-05-20 12:00 |
13:51:19.58 |
-07:41:47.3 |
HIP 67578 |
8.86 |
| 2026-05-21 00:00 |
13:51:08.30 |
-07:40:23.1 |
HIP 67578 |
7.95 |
| 2026-05-21 12:00 |
13:50:57.10 |
-07:38:59.4 |
HIP 67553 |
6.82 |
| 2026-05-22 00:00 |
13:50:45.96 |
-07:37:36.1 |
HIP 67553 |
3.73 |
| 2026-05-22 12:00 |
13:50:34.89 |
-07:36:13.3 |
HIP 67553 |
0.66 |
| 2026-05-23 00:00 |
13:50:23.89 |
-07:34:51.1 |
HIP 67553 |
2.39 |
| 2026-05-23 12:00 |
13:50:12.97 |
-07:33:29.3 |
HIP 67553 |
5.42 |
| 2026-05-24 00:00 |
13:50:02.11 |
-07:32:08.0 |
HIP 67553 |
8.43 |
| 2026-05-24 12:00 |
13:49:51.33 |
-07:30:47.3 |
HIP 67553 |
11.42 |
| 2026-05-25 00:00 |
13:49:40.63 |
-07:29:27.0 |
HIP 67433 |
12.62 |
| 2026-05-25 12:00 |
13:49:29.99 |
-07:28:07.3 |
HIP 67433 |
10.20 |
| 2026-05-26 00:00 |
13:49:19.44 |
-07:26:48.1 |
HIP 67433 |
8.15 |
| 2026-05-26 12:00 |
13:49:08.96 |
-07:25:29.4 |
HIP 67433 |
6.79 |
| 2026-05-27 00:00 |
13:48:58.55 |
-07:24:11.2 |
HIP 67433 |
6.52 |
| 2026-05-27 12:00 |
13:48:48.23 |
-07:22:53.5 |
HIP 67433 |
7.46 |
| 2026-05-28 00:00 |
13:48:37.98 |
-07:21:36.4 |
HIP 67433 |
9.21 |
| 2026-05-28 12:00 |
13:48:27.80 |
-07:20:19.9 |
HIP 67433 |
11.40 |
| 2026-05-29 00:00 |
13:48:17.71 |
-07:19:03.8 |
HIP 67433 |
13.80 |
| 2026-05-29 12:00 |
13:48:07.70 |
-07:17:48.3 |
HIP 67433 |
16.31 |
| 2026-05-30 00:00 |
13:47:57.76 |
-07:16:33.4 |
HIP 67433 |
18.88 |
| 2026-05-30 12:00 |
13:47:47.91 |
-07:15:18.9 |
HIP 67433 |
21.47 |
| 2026-05-31 00:00 |
13:47:38.13 |
-07:14:05.1 |
HIP 67433 |
24.08 |
| 2026-05-31 12:00 |
13:47:28.44 |
-07:12:51.8 |
HIP 67355 |
25.75 |
| 2026-06-01 00:00 |
13:47:18.83 |
-07:11:39.0 |
HIP 67355 |
25.96 |
| 2026-06-01 12:00 |
13:47:09.31 |
-07:10:26.8 |
HIP 67355 |
26.44 |
| 2026-06-02 00:00 |
13:46:59.86 |
-07:09:15.2 |
HIP 67355 |
27.16 |