C/2005 P3 (SWAN)
メタデータ
| 項目 |
値 |
| Designation |
C/2005 P3 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2005-08-09T17:53:55.314240Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:51Z |
| Obs used |
78 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
9.750 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-09-05.0000000 |
| e |
0.98765964 |
| q (au) |
0.525760 |
| a (au) |
42.604934 |
| i (deg) |
89.706006 |
| Ω (om, deg) |
242.778577 |
| ω (w, deg) |
32.144830 |
| M (ma, deg) |
0.093049 |
等級
散乱 + 全体線形
$$
M_a = (11.682 + 2.791\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
11.682 |
| n |
2.791 |
| gf |
0.803 |
| gb |
-0.500 |
| 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 |
04:14:36.58 |
-01:12:20.1 |
HIP 19816 |
13.67 |
| 2026-02-03 12:00 |
04:14:35.42 |
-01:12:07.1 |
HIP 19816 |
13.60 |
| 2026-02-04 00:00 |
04:14:34.28 |
-01:11:54.0 |
HIP 19816 |
13.53 |
| 2026-02-04 12:00 |
04:14:33.16 |
-01:11:40.8 |
HIP 19816 |
13.46 |
| 2026-02-05 00:00 |
04:14:32.08 |
-01:11:27.4 |
HIP 19816 |
13.40 |
| 2026-02-05 12:00 |
04:14:31.02 |
-01:11:13.9 |
HIP 19816 |
13.34 |
| 2026-02-06 00:00 |
04:14:29.98 |
-01:11:00.4 |
HIP 19725 |
13.11 |
| 2026-02-06 12:00 |
04:14:28.98 |
-01:10:46.7 |
HIP 19725 |
12.83 |
| 2026-02-07 00:00 |
04:14:28.00 |
-01:10:32.9 |
HIP 19725 |
12.56 |
| 2026-02-07 12:00 |
04:14:27.05 |
-01:10:19.0 |
HIP 19725 |
12.29 |
| 2026-02-08 00:00 |
04:14:26.12 |
-01:10:04.9 |
HIP 19725 |
12.04 |
| 2026-02-08 12:00 |
04:14:25.22 |
-01:09:50.8 |
HIP 19725 |
11.80 |
| 2026-02-09 00:00 |
04:14:24.35 |
-01:09:36.6 |
HIP 19725 |
11.57 |
| 2026-02-09 12:00 |
04:14:23.50 |
-01:09:22.2 |
HIP 19725 |
11.34 |
| 2026-02-10 00:00 |
04:14:22.69 |
-01:09:07.8 |
HIP 19725 |
11.13 |
| 2026-02-10 12:00 |
04:14:21.90 |
-01:08:53.3 |
HIP 19725 |
10.94 |
| 2026-02-11 00:00 |
04:14:21.13 |
-01:08:38.6 |
HIP 19725 |
10.75 |
| 2026-02-11 12:00 |
04:14:20.40 |
-01:08:23.9 |
HIP 19725 |
10.58 |
| 2026-02-12 00:00 |
04:14:19.69 |
-01:08:09.1 |
HIP 19725 |
10.42 |
| 2026-02-12 12:00 |
04:14:19.01 |
-01:07:54.1 |
HIP 19725 |
10.27 |
| 2026-02-13 00:00 |
04:14:18.36 |
-01:07:39.1 |
HIP 19725 |
10.14 |
| 2026-02-13 12:00 |
04:14:17.73 |
-01:07:24.0 |
HIP 19725 |
10.02 |
| 2026-02-14 00:00 |
04:14:17.13 |
-01:07:08.8 |
HIP 19725 |
9.92 |
| 2026-02-14 12:00 |
04:14:16.56 |
-01:06:53.5 |
HIP 19725 |
9.83 |
| 2026-02-15 00:00 |
04:14:16.02 |
-01:06:38.1 |
HIP 19725 |
9.75 |
| 2026-02-15 12:00 |
04:14:15.50 |
-01:06:22.7 |
HIP 19725 |
9.69 |
| 2026-02-16 00:00 |
04:14:15.01 |
-01:06:07.1 |
HIP 19725 |
9.65 |
| 2026-02-16 12:00 |
04:14:14.55 |
-01:05:51.4 |
HIP 19725 |
9.62 |
| 2026-02-17 00:00 |
04:14:14.12 |
-01:05:35.7 |
HIP 19725 |
9.61 |
| 2026-02-17 12:00 |
04:14:13.71 |
-01:05:19.9 |
HIP 19725 |
9.61 |
| 2026-02-18 00:00 |
04:14:13.34 |
-01:05:04.0 |
HIP 19725 |
9.63 |
| 2026-02-18 12:00 |
04:14:12.99 |
-01:04:48.1 |
HIP 19725 |
9.66 |
| 2026-02-19 00:00 |
04:14:12.67 |
-01:04:32.0 |
HIP 19725 |
9.71 |
| 2026-02-19 12:00 |
04:14:12.37 |
-01:04:15.9 |
HIP 19725 |
9.77 |
| 2026-02-20 00:00 |
04:14:12.10 |
-01:03:59.7 |
HIP 19725 |
9.85 |
| 2026-02-20 12:00 |
04:14:11.87 |
-01:03:43.4 |
HIP 19725 |
9.93 |
| 2026-02-21 00:00 |
04:14:11.65 |
-01:03:27.1 |
HIP 19725 |
10.04 |
| 2026-02-21 12:00 |
04:14:11.47 |
-01:03:10.7 |
HIP 19725 |
10.15 |
| 2026-02-22 00:00 |
04:14:11.31 |
-01:02:54.2 |
HIP 19725 |
10.28 |
| 2026-02-22 12:00 |
04:14:11.19 |
-01:02:37.7 |
HIP 19725 |
10.42 |
| 2026-02-23 00:00 |
04:14:11.08 |
-01:02:21.1 |
HIP 19725 |
10.57 |
| 2026-02-23 12:00 |
04:14:11.01 |
-01:02:04.4 |
HIP 19725 |
10.73 |
| 2026-02-24 00:00 |
04:14:10.97 |
-01:01:47.7 |
HIP 19725 |
10.91 |