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) |
| 2026-05-12 00:00 |
11:12:12.93 |
-54:43:11.1 |
HIP 54659 |
12.37 |
| 2026-05-12 12:00 |
11:12:11.10 |
-54:42:37.9 |
HIP 54659 |
11.78 |
| 2026-05-13 00:00 |
11:12:09.30 |
-54:42:04.6 |
HIP 54659 |
11.18 |
| 2026-05-13 12:00 |
11:12:07.53 |
-54:41:31.3 |
HIP 54659 |
10.59 |
| 2026-05-14 00:00 |
11:12:05.80 |
-54:40:57.9 |
HIP 54659 |
10.01 |
| 2026-05-14 12:00 |
11:12:04.10 |
-54:40:24.5 |
HIP 54659 |
9.43 |
| 2026-05-15 00:00 |
11:12:02.43 |
-54:39:51.0 |
HIP 54659 |
8.85 |
| 2026-05-15 12:00 |
11:12:00.80 |
-54:39:17.5 |
HIP 54659 |
8.29 |
| 2026-05-16 00:00 |
11:11:59.20 |
-54:38:43.9 |
HIP 54659 |
7.73 |
| 2026-05-16 12:00 |
11:11:57.64 |
-54:38:10.3 |
HIP 54659 |
7.19 |
| 2026-05-17 00:00 |
11:11:56.11 |
-54:37:36.6 |
HIP 54659 |
6.66 |
| 2026-05-17 12:00 |
11:11:54.61 |
-54:37:02.9 |
HIP 54659 |
6.14 |
| 2026-05-18 00:00 |
11:11:53.15 |
-54:36:29.2 |
HIP 54659 |
5.65 |
| 2026-05-18 12:00 |
11:11:51.73 |
-54:35:55.4 |
HIP 54659 |
5.19 |
| 2026-05-19 00:00 |
11:11:50.33 |
-54:35:21.6 |
HIP 54659 |
4.75 |
| 2026-05-19 12:00 |
11:11:48.98 |
-54:34:47.8 |
HIP 54659 |
4.37 |
| 2026-05-20 00:00 |
11:11:47.66 |
-54:34:13.9 |
HIP 54659 |
4.04 |
| 2026-05-20 12:00 |
11:11:46.37 |
-54:33:40.0 |
HIP 54659 |
3.78 |
| 2026-05-21 00:00 |
11:11:45.12 |
-54:33:06.2 |
HIP 54659 |
3.60 |
| 2026-05-21 12:00 |
11:11:43.90 |
-54:32:32.3 |
HIP 54659 |
3.52 |
| 2026-05-22 00:00 |
11:11:42.72 |
-54:31:58.3 |
HIP 54659 |
3.55 |
| 2026-05-22 12:00 |
11:11:41.57 |
-54:31:24.4 |
HIP 54659 |
3.67 |
| 2026-05-23 00:00 |
11:11:40.45 |
-54:30:50.5 |
HIP 54659 |
3.89 |
| 2026-05-23 12:00 |
11:11:39.38 |
-54:30:16.6 |
HIP 54659 |
4.18 |
| 2026-05-24 00:00 |
11:11:38.33 |
-54:29:42.6 |
HIP 54659 |
4.53 |
| 2026-05-24 12:00 |
11:11:37.32 |
-54:29:08.7 |
HIP 54659 |
4.93 |
| 2026-05-25 00:00 |
11:11:36.35 |
-54:28:34.8 |
HIP 54659 |
5.37 |
| 2026-05-25 12:00 |
11:11:35.41 |
-54:28:00.8 |
HIP 54659 |
5.83 |
| 2026-05-26 00:00 |
11:11:34.51 |
-54:27:26.9 |
HIP 54659 |
6.31 |
| 2026-05-26 12:00 |
11:11:33.64 |
-54:26:53.0 |
HIP 54659 |
6.82 |
| 2026-05-27 00:00 |
11:11:32.81 |
-54:26:19.1 |
HIP 54659 |
7.33 |
| 2026-05-27 12:00 |
11:11:32.01 |
-54:25:45.3 |
HIP 54659 |
7.85 |
| 2026-05-28 00:00 |
11:11:31.24 |
-54:25:11.4 |
HIP 54659 |
8.38 |
| 2026-05-28 12:00 |
11:11:30.52 |
-54:24:37.6 |
HIP 54659 |
8.92 |
| 2026-05-29 00:00 |
11:11:29.82 |
-54:24:03.8 |
HIP 54659 |
9.46 |
| 2026-05-29 12:00 |
11:11:29.16 |
-54:23:30.0 |
HIP 54659 |
10.00 |
| 2026-05-30 00:00 |
11:11:28.54 |
-54:22:56.2 |
HIP 54659 |
10.55 |
| 2026-05-30 12:00 |
11:11:27.95 |
-54:22:22.5 |
HIP 54659 |
11.10 |
| 2026-05-31 00:00 |
11:11:27.40 |
-54:21:48.8 |
HIP 54659 |
11.65 |
| 2026-05-31 12:00 |
11:11:26.88 |
-54:21:15.1 |
HIP 54659 |
12.21 |
| 2026-06-01 00:00 |
11:11:26.39 |
-54:20:41.5 |
HIP 54659 |
12.76 |
| 2026-06-01 12:00 |
11:11:25.94 |
-54:20:07.9 |
HIP 54659 |
13.31 |
| 2026-06-02 00:00 |
11:11:25.53 |
-54:19:34.4 |
HIP 54659 |
13.87 |