メタデータ
| 項目 |
値 |
| Designation |
C/2011 Q4 (SWAN) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2011-09-21T02:00:10.520640Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:56Z |
| Obs used |
168 |
| NEO |
- |
| M1 |
11.700 |
| K1 |
9.250 |
| PC |
0.030 |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
2011-11-05.0000000 |
| e |
0.97415823 |
| q (au) |
1.112227 |
| a (au) |
43.039904 |
| i (deg) |
147.843070 |
| Ω (om, deg) |
252.085709 |
| ω (w, deg) |
1.880850 |
| M (ma, deg) |
0.156785 |
等級
散乱 + 全体線形
$$
M_a = (13.419 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
13.419 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.663 |
| k |
0.800 |
| 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) |
| 2026-06-01 00:00 |
05:37:41.15 |
+31:30:03.5 |
HIP 26419 |
10.99 |
| 2026-06-01 12:00 |
05:37:45.26 |
+31:30:01.9 |
HIP 26419 |
11.32 |
| 2026-06-02 00:00 |
05:37:49.38 |
+31:30:00.5 |
HIP 26419 |
11.72 |
| 2026-06-02 12:00 |
05:37:53.50 |
+31:29:59.1 |
HIP 26419 |
12.17 |
| 2026-06-03 00:00 |
05:37:57.64 |
+31:29:57.8 |
HIP 26419 |
12.66 |
| 2026-06-03 12:00 |
05:38:01.78 |
+31:29:56.5 |
HIP 26419 |
13.20 |
| 2026-06-04 00:00 |
05:38:05.93 |
+31:29:55.3 |
HIP 26570 |
13.11 |
| 2026-06-04 12:00 |
05:38:10.09 |
+31:29:54.2 |
HIP 26570 |
12.37 |
| 2026-06-05 00:00 |
05:38:14.25 |
+31:29:53.1 |
HIP 26570 |
11.65 |
| 2026-06-05 12:00 |
05:38:18.42 |
+31:29:52.1 |
HIP 26570 |
10.95 |
| 2026-06-06 00:00 |
05:38:22.59 |
+31:29:51.1 |
HIP 26570 |
10.28 |
| 2026-06-06 12:00 |
05:38:26.77 |
+31:29:50.2 |
HIP 26570 |
9.65 |
| 2026-06-07 00:00 |
05:38:30.96 |
+31:29:49.4 |
HIP 26570 |
9.06 |
| 2026-06-07 12:00 |
05:38:35.15 |
+31:29:48.7 |
HIP 26570 |
8.53 |
| 2026-06-08 00:00 |
05:38:39.35 |
+31:29:47.9 |
HIP 26570 |
8.06 |
| 2026-06-08 12:00 |
05:38:43.55 |
+31:29:47.3 |
HIP 26570 |
7.66 |
| 2026-06-09 00:00 |
05:38:47.76 |
+31:29:46.7 |
HIP 26570 |
7.36 |
| 2026-06-09 12:00 |
05:38:51.97 |
+31:29:46.2 |
HIP 26570 |
7.15 |
| 2026-06-10 00:00 |
05:38:56.18 |
+31:29:45.7 |
HIP 26570 |
7.06 |
| 2026-06-10 12:00 |
05:39:00.40 |
+31:29:45.3 |
HIP 26570 |
7.08 |
| 2026-06-11 00:00 |
05:39:04.62 |
+31:29:45.0 |
HIP 26570 |
7.21 |
| 2026-06-11 12:00 |
05:39:08.84 |
+31:29:44.7 |
HIP 26570 |
7.46 |
| 2026-06-12 00:00 |
05:39:13.07 |
+31:29:44.5 |
HIP 26570 |
7.80 |
| 2026-06-12 12:00 |
05:39:17.30 |
+31:29:44.4 |
HIP 26570 |
8.23 |
| 2026-06-13 00:00 |
05:39:21.53 |
+31:29:44.3 |
HIP 26570 |
8.73 |
| 2026-06-13 12:00 |
05:39:25.76 |
+31:29:44.2 |
HIP 26570 |
9.29 |
| 2026-06-14 00:00 |
05:39:30.00 |
+31:29:44.3 |
HIP 26570 |
9.91 |
| 2026-06-14 12:00 |
05:39:34.24 |
+31:29:44.3 |
HIP 26570 |
10.56 |
| 2026-06-15 00:00 |
05:39:38.47 |
+31:29:44.5 |
HIP 26570 |
11.26 |
| 2026-06-15 12:00 |
05:39:42.71 |
+31:29:44.7 |
HIP 26570 |
11.98 |
| 2026-06-16 00:00 |
05:39:46.95 |
+31:29:45.0 |
HIP 26570 |
12.72 |
| 2026-06-16 12:00 |
05:39:51.19 |
+31:29:45.3 |
HIP 26712 |
12.62 |
| 2026-06-17 00:00 |
05:39:55.42 |
+31:29:45.7 |
HIP 26712 |
11.96 |
| 2026-06-17 12:00 |
05:39:59.66 |
+31:29:46.1 |
HIP 26712 |
11.33 |
| 2026-06-18 00:00 |
05:40:03.90 |
+31:29:46.6 |
HIP 26712 |
10.74 |
| 2026-06-18 12:00 |
05:40:08.13 |
+31:29:47.2 |
HIP 26712 |
10.19 |
| 2026-06-19 00:00 |
05:40:12.36 |
+31:29:47.8 |
HIP 26712 |
9.70 |
| 2026-06-19 12:00 |
05:40:16.59 |
+31:29:48.5 |
HIP 26712 |
9.28 |
| 2026-06-20 00:00 |
05:40:20.82 |
+31:29:49.2 |
HIP 26712 |
8.93 |
| 2026-06-20 12:00 |
05:40:25.05 |
+31:29:50.0 |
HIP 26712 |
8.66 |
| 2026-06-21 00:00 |
05:40:29.27 |
+31:29:50.9 |
HIP 26712 |
8.47 |
| 2026-06-21 12:00 |
05:40:33.49 |
+31:29:51.8 |
HIP 26712 |
8.39 |
| 2026-06-22 00:00 |
05:40:37.71 |
+31:29:52.7 |
HIP 26712 |
8.39 |