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) |
| 2026-09-20 00:00 |
11:20:42.04 |
-53:28:28.2 |
HIP 55329 |
7.79 |
| 2026-09-20 12:00 |
11:20:45.98 |
-53:28:41.9 |
HIP 55329 |
8.37 |
| 2026-09-21 00:00 |
11:20:49.91 |
-53:28:55.8 |
HIP 55329 |
8.96 |
| 2026-09-21 12:00 |
11:20:53.84 |
-53:29:10.0 |
HIP 55329 |
9.56 |
| 2026-09-22 00:00 |
11:20:57.76 |
-53:29:24.5 |
HIP 55329 |
10.16 |
| 2026-09-22 12:00 |
11:21:01.68 |
-53:29:39.2 |
HIP 55329 |
10.76 |
| 2026-09-23 00:00 |
11:21:05.59 |
-53:29:54.2 |
HIP 55373 |
11.20 |
| 2026-09-23 12:00 |
11:21:09.50 |
-53:30:09.4 |
HIP 55373 |
11.39 |
| 2026-09-24 00:00 |
11:21:13.40 |
-53:30:24.8 |
HIP 55373 |
11.61 |
| 2026-09-24 12:00 |
11:21:17.29 |
-53:30:40.5 |
HIP 55373 |
11.85 |
| 2026-09-25 00:00 |
11:21:21.18 |
-53:30:56.5 |
HIP 55373 |
12.12 |
| 2026-09-25 12:00 |
11:21:25.06 |
-53:31:12.7 |
HIP 55373 |
12.42 |
| 2026-09-26 00:00 |
11:21:28.93 |
-53:31:29.1 |
HIP 55373 |
12.73 |
| 2026-09-26 12:00 |
11:21:32.80 |
-53:31:45.8 |
HIP 55537 |
12.98 |
| 2026-09-27 00:00 |
11:21:36.65 |
-53:32:02.7 |
HIP 55537 |
12.82 |
| 2026-09-27 12:00 |
11:21:40.50 |
-53:32:19.9 |
HIP 55537 |
12.68 |
| 2026-09-28 00:00 |
11:21:44.35 |
-53:32:37.3 |
HIP 55537 |
12.59 |
| 2026-09-28 12:00 |
11:21:48.18 |
-53:32:55.0 |
HIP 55537 |
12.53 |
| 2026-09-29 00:00 |
11:21:52.00 |
-53:33:12.8 |
HIP 55537 |
12.51 |
| 2026-09-29 12:00 |
11:21:55.82 |
-53:33:31.0 |
HIP 55537 |
12.52 |
| 2026-09-30 00:00 |
11:21:59.63 |
-53:33:49.3 |
HIP 55537 |
12.57 |
| 2026-09-30 12:00 |
11:22:03.42 |
-53:34:07.9 |
HIP 55537 |
12.66 |
| 2026-10-01 00:00 |
11:22:07.21 |
-53:34:26.8 |
HIP 55537 |
12.78 |
| 2026-10-01 12:00 |
11:22:10.99 |
-53:34:45.9 |
HIP 55537 |
12.94 |
| 2026-10-02 00:00 |
11:22:14.76 |
-53:35:05.2 |
HIP 55537 |
13.14 |
| 2026-10-02 12:00 |
11:22:18.52 |
-53:35:24.7 |
HIP 55537 |
13.36 |
| 2026-10-03 00:00 |
11:22:22.26 |
-53:35:44.5 |
HIP 55537 |
13.62 |
| 2026-10-03 12:00 |
11:22:26.00 |
-53:36:04.5 |
HIP 55537 |
13.91 |
| 2026-10-04 00:00 |
11:22:29.73 |
-53:36:24.7 |
HIP 55537 |
14.22 |
| 2026-10-04 12:00 |
11:22:33.44 |
-53:36:45.2 |
HIP 55537 |
14.56 |
| 2026-10-05 00:00 |
11:22:37.14 |
-53:37:05.8 |
HIP 55537 |
14.93 |
| 2026-10-05 12:00 |
11:22:40.84 |
-53:37:26.8 |
HIP 55537 |
15.32 |
| 2026-10-06 00:00 |
11:22:44.52 |
-53:37:47.9 |
HIP 55537 |
15.72 |
| 2026-10-06 12:00 |
11:22:48.18 |
-53:38:09.2 |
HIP 55537 |
16.15 |
| 2026-10-07 00:00 |
11:22:51.84 |
-53:38:30.8 |
HIP 55537 |
16.60 |
| 2026-10-07 12:00 |
11:22:55.48 |
-53:38:52.6 |
HIP 55537 |
17.06 |
| 2026-10-08 00:00 |
11:22:59.11 |
-53:39:14.7 |
HIP 55537 |
17.53 |
| 2026-10-08 12:00 |
11:23:02.72 |
-53:39:36.9 |
HIP 55537 |
18.02 |
| 2026-10-09 00:00 |
11:23:06.32 |
-53:39:59.4 |
HIP 55537 |
18.53 |
| 2026-10-09 12:00 |
11:23:09.91 |
-53:40:22.0 |
HIP 55537 |
19.04 |
| 2026-10-10 00:00 |
11:23:13.48 |
-53:40:44.9 |
HIP 55537 |
19.57 |
| 2026-10-10 12:00 |
11:23:17.04 |
-53:41:08.0 |
HIP 55537 |
20.11 |
| 2026-10-11 00:00 |
11:23:20.58 |
-53:41:31.3 |
HIP 55537 |
20.65 |