C/2004 V13 (SWAN)
メタデータ
| 項目 |
値 |
| Designation |
C/2004 V13 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2004-12-21T03:38:32.539200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:45Z |
| Obs used |
25 |
| NEO |
- |
| M1 |
15.000 |
| K1 |
15.000 |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2005-01-03.0000000 |
| e |
0.99999462 |
| q (au) |
0.180856 |
| a (au) |
33639.443095 |
| i (deg) |
34.809752 |
| Ω (om, deg) |
207.699525 |
| ω (w, deg) |
92.690799 |
| M (ma, deg) |
0.000002 |
等級
散乱 + 全体線形
$$
M_a = (13.145 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.145 |
| n |
2.000 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
0.800 |
| δ90 |
1.000 |
| 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 |
07:10:50.68 |
-13:11:54.4 |
HIP 34682 |
1.57 |
| 2026-02-03 12:00 |
07:10:48.14 |
-13:11:39.3 |
HIP 34682 |
2.22 |
| 2026-02-04 00:00 |
07:10:45.62 |
-13:11:24.0 |
HIP 34682 |
2.87 |
| 2026-02-04 12:00 |
07:10:43.10 |
-13:11:08.5 |
HIP 34682 |
3.53 |
| 2026-02-05 00:00 |
07:10:40.60 |
-13:10:52.9 |
HIP 34682 |
4.18 |
| 2026-02-05 12:00 |
07:10:38.12 |
-13:10:37.1 |
HIP 34682 |
4.84 |
| 2026-02-06 00:00 |
07:10:35.64 |
-13:10:21.1 |
HIP 34682 |
5.49 |
| 2026-02-06 12:00 |
07:10:33.18 |
-13:10:05.0 |
HIP 34682 |
6.15 |
| 2026-02-07 00:00 |
07:10:30.73 |
-13:09:48.7 |
HIP 34682 |
6.80 |
| 2026-02-07 12:00 |
07:10:28.30 |
-13:09:32.2 |
HIP 34682 |
7.45 |
| 2026-02-08 00:00 |
07:10:25.88 |
-13:09:15.6 |
HIP 34682 |
8.10 |
| 2026-02-08 12:00 |
07:10:23.47 |
-13:08:58.8 |
HIP 34682 |
8.74 |
| 2026-02-09 00:00 |
07:10:21.08 |
-13:08:41.9 |
HIP 34682 |
9.39 |
| 2026-02-09 12:00 |
07:10:18.71 |
-13:08:24.8 |
HIP 34682 |
10.03 |
| 2026-02-10 00:00 |
07:10:16.35 |
-13:08:07.5 |
HIP 34682 |
10.67 |
| 2026-02-10 12:00 |
07:10:14.00 |
-13:07:50.1 |
HIP 34682 |
11.31 |
| 2026-02-11 00:00 |
07:10:11.67 |
-13:07:32.5 |
HIP 34682 |
11.94 |
| 2026-02-11 12:00 |
07:10:09.35 |
-13:07:14.8 |
HIP 34682 |
12.58 |
| 2026-02-12 00:00 |
07:10:07.05 |
-13:06:56.9 |
HIP 34682 |
13.21 |
| 2026-02-12 12:00 |
07:10:04.77 |
-13:06:38.9 |
HIP 34682 |
13.84 |
| 2026-02-13 00:00 |
07:10:02.50 |
-13:06:20.7 |
HIP 34682 |
14.46 |
| 2026-02-13 12:00 |
07:10:00.25 |
-13:06:02.4 |
HIP 34682 |
15.09 |
| 2026-02-14 00:00 |
07:09:58.01 |
-13:05:43.9 |
HIP 34682 |
15.71 |
| 2026-02-14 12:00 |
07:09:55.79 |
-13:05:25.3 |
HIP 34682 |
16.33 |
| 2026-02-15 00:00 |
07:09:53.59 |
-13:05:06.6 |
HIP 34682 |
16.95 |
| 2026-02-15 12:00 |
07:09:51.40 |
-13:04:47.7 |
HIP 34682 |
17.56 |
| 2026-02-16 00:00 |
07:09:49.23 |
-13:04:28.6 |
HIP 34682 |
18.18 |
| 2026-02-16 12:00 |
07:09:47.08 |
-13:04:09.5 |
HIP 34682 |
18.79 |
| 2026-02-17 00:00 |
07:09:44.94 |
-13:03:50.2 |
HIP 34682 |
19.39 |
| 2026-02-17 12:00 |
07:09:42.83 |
-13:03:30.7 |
HIP 34682 |
20.00 |
| 2026-02-18 00:00 |
07:09:40.73 |
-13:03:11.2 |
HIP 34454 |
19.47 |
| 2026-02-18 12:00 |
07:09:38.65 |
-13:02:51.5 |
HIP 34454 |
18.87 |
| 2026-02-19 00:00 |
07:09:36.58 |
-13:02:31.7 |
HIP 34454 |
18.27 |
| 2026-02-19 12:00 |
07:09:34.54 |
-13:02:11.7 |
HIP 34454 |
17.67 |
| 2026-02-20 00:00 |
07:09:32.51 |
-13:01:51.7 |
HIP 34454 |
17.07 |
| 2026-02-20 12:00 |
07:09:30.51 |
-13:01:31.5 |
HIP 34454 |
16.48 |
| 2026-02-21 00:00 |
07:09:28.52 |
-13:01:11.2 |
HIP 34454 |
15.89 |
| 2026-02-21 12:00 |
07:09:26.55 |
-13:00:50.8 |
HIP 34454 |
15.30 |
| 2026-02-22 00:00 |
07:09:24.60 |
-13:00:30.2 |
HIP 34454 |
14.72 |
| 2026-02-22 12:00 |
07:09:22.66 |
-13:00:09.6 |
HIP 34454 |
14.14 |
| 2026-02-23 00:00 |
07:09:20.75 |
-12:59:48.8 |
HIP 34454 |
13.57 |
| 2026-02-23 12:00 |
07:09:18.86 |
-12:59:27.9 |
HIP 34454 |
12.99 |
| 2026-02-24 00:00 |
07:09:16.98 |
-12:59:06.9 |
HIP 34454 |
12.43 |