メタデータ
| 項目 |
値 |
| Designation |
C/2002 O6 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-09-09T10:47:45.683520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:18Z |
| Obs used |
215 |
| NEO |
- |
| M1 |
13.000 |
| K1 |
17.000 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2002-08-11.0000000 |
| e |
0.99857622 |
| q (au) |
0.494648 |
| a (au) |
347.419672 |
| i (deg) |
58.623930 |
| Ω (om, deg) |
330.951734 |
| ω (w, deg) |
78.749213 |
| M (ma, deg) |
359.995518 |
等級
散乱 + 全体線形
$$
M_a = (12.479 + 5.037\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
12.479 |
| n |
5.037 |
| 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) |
| 2026-07-29 00:00 |
11:14:09.95 |
-53:29:47.1 |
HIP 54883 |
2.11 |
| 2026-07-29 12:00 |
11:14:12.96 |
-53:29:32.3 |
HIP 54883 |
2.21 |
| 2026-07-30 00:00 |
11:14:16.00 |
-53:29:17.7 |
HIP 54883 |
2.42 |
| 2026-07-30 12:00 |
11:14:19.06 |
-53:29:03.4 |
HIP 54883 |
2.70 |
| 2026-07-31 00:00 |
11:14:22.14 |
-53:28:49.3 |
HIP 54883 |
3.05 |
| 2026-07-31 12:00 |
11:14:25.23 |
-53:28:35.5 |
HIP 54883 |
3.43 |
| 2026-08-01 00:00 |
11:14:28.35 |
-53:28:22.0 |
HIP 54883 |
3.84 |
| 2026-08-01 12:00 |
11:14:31.49 |
-53:28:08.7 |
HIP 54911 |
3.91 |
| 2026-08-02 00:00 |
11:14:34.65 |
-53:27:55.6 |
HIP 54911 |
3.99 |
| 2026-08-02 12:00 |
11:14:37.82 |
-53:27:42.8 |
HIP 54911 |
4.13 |
| 2026-08-03 00:00 |
11:14:41.02 |
-53:27:30.3 |
HIP 54911 |
4.33 |
| 2026-08-03 12:00 |
11:14:44.23 |
-53:27:18.0 |
HIP 54911 |
4.57 |
| 2026-08-04 00:00 |
11:14:47.47 |
-53:27:06.0 |
HIP 54911 |
4.85 |
| 2026-08-04 12:00 |
11:14:50.72 |
-53:26:54.2 |
HIP 54911 |
5.16 |
| 2026-08-05 00:00 |
11:14:53.99 |
-53:26:42.7 |
HIP 54911 |
5.51 |
| 2026-08-05 12:00 |
11:14:57.28 |
-53:26:31.5 |
HIP 54911 |
5.87 |
| 2026-08-06 00:00 |
11:15:00.58 |
-53:26:20.5 |
HIP 54911 |
6.26 |
| 2026-08-06 12:00 |
11:15:03.91 |
-53:26:09.8 |
HIP 54911 |
6.66 |
| 2026-08-07 00:00 |
11:15:07.25 |
-53:25:59.4 |
HIP 54911 |
7.08 |
| 2026-08-07 12:00 |
11:15:10.61 |
-53:25:49.2 |
HIP 54911 |
7.51 |
| 2026-08-08 00:00 |
11:15:13.99 |
-53:25:39.3 |
HIP 54911 |
7.95 |
| 2026-08-08 12:00 |
11:15:17.38 |
-53:25:29.6 |
HIP 54911 |
8.40 |
| 2026-08-09 00:00 |
11:15:20.79 |
-53:25:20.2 |
HIP 54911 |
8.85 |
| 2026-08-09 12:00 |
11:15:24.22 |
-53:25:11.1 |
HIP 54911 |
9.32 |
| 2026-08-10 00:00 |
11:15:27.66 |
-53:25:02.3 |
HIP 54911 |
9.78 |
| 2026-08-10 12:00 |
11:15:31.12 |
-53:24:53.7 |
HIP 54911 |
10.26 |
| 2026-08-11 00:00 |
11:15:34.59 |
-53:24:45.4 |
HIP 54911 |
10.74 |
| 2026-08-11 12:00 |
11:15:38.08 |
-53:24:37.3 |
HIP 54911 |
11.22 |
| 2026-08-12 00:00 |
11:15:41.59 |
-53:24:29.6 |
HIP 54911 |
11.70 |
| 2026-08-12 12:00 |
11:15:45.11 |
-53:24:22.1 |
HIP 55097 |
11.33 |
| 2026-08-13 00:00 |
11:15:48.64 |
-53:24:14.9 |
HIP 55097 |
10.95 |
| 2026-08-13 12:00 |
11:15:52.19 |
-53:24:07.9 |
HIP 55097 |
10.58 |
| 2026-08-14 00:00 |
11:15:55.76 |
-53:24:01.2 |
HIP 55097 |
10.21 |
| 2026-08-14 12:00 |
11:15:59.33 |
-53:23:54.8 |
HIP 55097 |
9.86 |
| 2026-08-15 00:00 |
11:16:02.93 |
-53:23:48.7 |
HIP 55097 |
9.52 |
| 2026-08-15 12:00 |
11:16:06.53 |
-53:23:42.8 |
HIP 55097 |
9.19 |
| 2026-08-16 00:00 |
11:16:10.15 |
-53:23:37.3 |
HIP 55097 |
8.89 |
| 2026-08-16 12:00 |
11:16:13.78 |
-53:23:32.0 |
HIP 55097 |
8.60 |
| 2026-08-17 00:00 |
11:16:17.43 |
-53:23:26.9 |
HIP 55097 |
8.33 |
| 2026-08-17 12:00 |
11:16:21.08 |
-53:23:22.2 |
HIP 55097 |
8.09 |
| 2026-08-18 00:00 |
11:16:24.75 |
-53:23:17.7 |
HIP 55097 |
7.87 |
| 2026-08-18 12:00 |
11:16:28.44 |
-53:23:13.5 |
HIP 55097 |
7.68 |
| 2026-08-19 00:00 |
11:16:32.13 |
-53:23:09.6 |
HIP 55097 |
7.52 |