C/2022 S5 (PANSTARRS)
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) |
| 2026-02-03 00:00 |
14:28:26.25 |
-12:49:39.1 |
HIP 70634 |
22.90 |
| 2026-02-03 12:00 |
14:28:23.70 |
-12:48:51.9 |
HIP 70634 |
22.46 |
| 2026-02-04 00:00 |
14:28:21.05 |
-12:48:04.0 |
HIP 70634 |
22.04 |
| 2026-02-04 12:00 |
14:28:18.29 |
-12:47:15.6 |
HIP 70634 |
21.63 |
| 2026-02-05 00:00 |
14:28:15.42 |
-12:46:26.6 |
HIP 70634 |
21.25 |
| 2026-02-05 12:00 |
14:28:12.43 |
-12:45:37.0 |
HIP 70634 |
20.89 |
| 2026-02-06 00:00 |
14:28:09.34 |
-12:44:46.8 |
HIP 70634 |
20.57 |
| 2026-02-06 12:00 |
14:28:06.14 |
-12:43:56.1 |
HIP 70634 |
20.28 |
| 2026-02-07 00:00 |
14:28:02.83 |
-12:43:04.7 |
HIP 70634 |
20.04 |
| 2026-02-07 12:00 |
14:27:59.40 |
-12:42:12.8 |
HIP 70634 |
19.85 |
| 2026-02-08 00:00 |
14:27:55.87 |
-12:41:20.4 |
HIP 70634 |
19.72 |
| 2026-02-08 12:00 |
14:27:52.23 |
-12:40:27.3 |
HIP 70634 |
19.65 |
| 2026-02-09 00:00 |
14:27:48.48 |
-12:39:33.6 |
HIP 70634 |
19.65 |
| 2026-02-09 12:00 |
14:27:44.61 |
-12:38:39.4 |
HIP 70634 |
19.73 |
| 2026-02-10 00:00 |
14:27:40.64 |
-12:37:44.6 |
HIP 70634 |
19.88 |
| 2026-02-10 12:00 |
14:27:36.56 |
-12:36:49.2 |
HIP 70634 |
20.11 |
| 2026-02-11 00:00 |
14:27:32.36 |
-12:35:53.2 |
HIP 70634 |
20.43 |
| 2026-02-11 12:00 |
14:27:28.06 |
-12:34:56.7 |
HIP 70634 |
20.83 |
| 2026-02-12 00:00 |
14:27:23.64 |
-12:33:59.6 |
HIP 70634 |
21.32 |
| 2026-02-12 12:00 |
14:27:19.12 |
-12:33:01.9 |
HIP 70634 |
21.90 |
| 2026-02-13 00:00 |
14:27:14.48 |
-12:32:03.6 |
HIP 70634 |
22.55 |
| 2026-02-13 12:00 |
14:27:09.74 |
-12:31:04.7 |
HIP 70634 |
23.29 |
| 2026-02-14 00:00 |
14:27:04.88 |
-12:30:05.3 |
HIP 70634 |
24.11 |
| 2026-02-14 12:00 |
14:26:59.92 |
-12:29:05.2 |
HIP 70634 |
25.01 |
| 2026-02-15 00:00 |
14:26:54.84 |
-12:28:04.6 |
HIP 70634 |
25.98 |
| 2026-02-15 12:00 |
14:26:49.66 |
-12:27:03.5 |
HIP 70634 |
27.02 |
| 2026-02-16 00:00 |
14:26:44.36 |
-12:26:01.7 |
HIP 70634 |
28.13 |
| 2026-02-16 12:00 |
14:26:38.96 |
-12:24:59.4 |
HIP 70634 |
29.30 |
| 2026-02-17 00:00 |
14:26:33.45 |
-12:23:56.5 |
HIP 70432 |
30.25 |
| 2026-02-17 12:00 |
14:26:27.83 |
-12:22:53.1 |
HIP 70432 |
28.94 |
| 2026-02-18 00:00 |
14:26:22.10 |
-12:21:49.0 |
HIP 70432 |
27.65 |
| 2026-02-18 12:00 |
14:26:16.26 |
-12:20:44.5 |
HIP 70432 |
26.40 |
| 2026-02-19 00:00 |
14:26:10.31 |
-12:19:39.3 |
HIP 70432 |
25.18 |
| 2026-02-19 12:00 |
14:26:04.26 |
-12:18:33.6 |
HIP 70432 |
24.02 |
| 2026-02-20 00:00 |
14:25:58.10 |
-12:17:27.3 |
HIP 70432 |
22.92 |
| 2026-02-20 12:00 |
14:25:51.83 |
-12:16:20.5 |
HIP 70432 |
21.90 |
| 2026-02-21 00:00 |
14:25:45.45 |
-12:15:13.1 |
HIP 70432 |
20.99 |
| 2026-02-21 12:00 |
14:25:38.97 |
-12:14:05.1 |
HIP 70432 |
20.21 |
| 2026-02-22 00:00 |
14:25:32.38 |
-12:12:56.6 |
HIP 70432 |
19.57 |
| 2026-02-22 12:00 |
14:25:25.69 |
-12:11:47.6 |
HIP 70432 |
19.11 |
| 2026-02-23 00:00 |
14:25:18.89 |
-12:10:38.0 |
HIP 70432 |
18.83 |
| 2026-02-23 12:00 |
14:25:11.98 |
-12:09:27.8 |
HIP 70432 |
18.77 |
| 2026-02-24 00:00 |
14:25:04.97 |
-12:08:17.1 |
HIP 70432 |
18.92 |