メタデータ
| 項目 |
値 |
| Designation |
C/1892 E1 (Swift) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
1892-04-07T03:44:20.731200Z |
| Orbit solution date (soln_date, UTC) |
2023-10-09T20:36:13Z |
| Obs used |
53 |
| NEO |
- |
| M1 |
- |
| K1 |
- |
| PC |
- |
オスキュレーティング軌道要素
| 項目 |
値 |
| Epoch (epoch_cal, TDB) |
1892-07-27.0000000 |
| e |
0.99880065 |
| q (au) |
1.026893 |
| a (au) |
856.207621 |
| i (deg) |
38.700724 |
| Ω (om, deg) |
242.428343 |
| ω (w, deg) |
24.504179 |
| M (ma, deg) |
0.004361 |
等級
散乱 + 全体線形
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
モデル定数
| 項目 |
値 |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
04:57:11.13 |
+12:55:01.9 |
HIP 23085 |
15.23 |
| 2026-06-01 12:00 |
04:57:11.96 |
+12:55:03.3 |
HIP 23085 |
15.04 |
| 2026-06-02 00:00 |
04:57:12.79 |
+12:55:04.7 |
HIP 23085 |
14.85 |
| 2026-06-02 12:00 |
04:57:13.62 |
+12:55:06.1 |
HIP 23085 |
14.66 |
| 2026-06-03 00:00 |
04:57:14.46 |
+12:55:07.5 |
HIP 23085 |
14.47 |
| 2026-06-03 12:00 |
04:57:15.29 |
+12:55:08.8 |
HIP 23085 |
14.28 |
| 2026-06-04 00:00 |
04:57:16.13 |
+12:55:10.2 |
HIP 23085 |
14.10 |
| 2026-06-04 12:00 |
04:57:16.96 |
+12:55:11.5 |
HIP 23085 |
13.91 |
| 2026-06-05 00:00 |
04:57:17.80 |
+12:55:12.8 |
HIP 23085 |
13.72 |
| 2026-06-05 12:00 |
04:57:18.63 |
+12:55:14.1 |
HIP 23085 |
13.53 |
| 2026-06-06 00:00 |
04:57:19.47 |
+12:55:15.4 |
HIP 23085 |
13.35 |
| 2026-06-06 12:00 |
04:57:20.30 |
+12:55:16.6 |
HIP 23085 |
13.16 |
| 2026-06-07 00:00 |
04:57:21.14 |
+12:55:17.8 |
HIP 23085 |
12.98 |
| 2026-06-07 12:00 |
04:57:21.97 |
+12:55:19.1 |
HIP 23085 |
12.80 |
| 2026-06-08 00:00 |
04:57:22.81 |
+12:55:20.3 |
HIP 23085 |
12.61 |
| 2026-06-08 12:00 |
04:57:23.64 |
+12:55:21.4 |
HIP 23085 |
12.43 |
| 2026-06-09 00:00 |
04:57:24.48 |
+12:55:22.6 |
HIP 23085 |
12.25 |
| 2026-06-09 12:00 |
04:57:25.31 |
+12:55:23.8 |
HIP 23085 |
12.07 |
| 2026-06-10 00:00 |
04:57:26.15 |
+12:55:24.9 |
HIP 23085 |
11.89 |
| 2026-06-10 12:00 |
04:57:26.98 |
+12:55:26.0 |
HIP 23085 |
11.71 |
| 2026-06-11 00:00 |
04:57:27.82 |
+12:55:27.1 |
HIP 23085 |
11.53 |
| 2026-06-11 12:00 |
04:57:28.65 |
+12:55:28.2 |
HIP 23085 |
11.36 |
| 2026-06-12 00:00 |
04:57:29.48 |
+12:55:29.2 |
HIP 23085 |
11.18 |
| 2026-06-12 12:00 |
04:57:30.32 |
+12:55:30.3 |
HIP 23085 |
11.01 |
| 2026-06-13 00:00 |
04:57:31.15 |
+12:55:31.3 |
HIP 23085 |
10.84 |
| 2026-06-13 12:00 |
04:57:31.98 |
+12:55:32.3 |
HIP 23085 |
10.67 |
| 2026-06-14 00:00 |
04:57:32.81 |
+12:55:33.2 |
HIP 23085 |
10.50 |
| 2026-06-14 12:00 |
04:57:33.64 |
+12:55:34.2 |
HIP 23085 |
10.33 |
| 2026-06-15 00:00 |
04:57:34.47 |
+12:55:35.1 |
HIP 23085 |
10.17 |
| 2026-06-15 12:00 |
04:57:35.29 |
+12:55:36.1 |
HIP 23085 |
10.00 |
| 2026-06-16 00:00 |
04:57:36.12 |
+12:55:37.0 |
HIP 23085 |
9.84 |
| 2026-06-16 12:00 |
04:57:36.94 |
+12:55:37.9 |
HIP 23085 |
9.68 |
| 2026-06-17 00:00 |
04:57:37.77 |
+12:55:38.7 |
HIP 23085 |
9.52 |
| 2026-06-17 12:00 |
04:57:38.59 |
+12:55:39.6 |
HIP 23085 |
9.37 |
| 2026-06-18 00:00 |
04:57:39.41 |
+12:55:40.4 |
HIP 23085 |
9.21 |
| 2026-06-18 12:00 |
04:57:40.23 |
+12:55:41.2 |
HIP 23085 |
9.06 |
| 2026-06-19 00:00 |
04:57:41.05 |
+12:55:42.0 |
HIP 23085 |
8.91 |
| 2026-06-19 12:00 |
04:57:41.87 |
+12:55:42.8 |
HIP 23085 |
8.77 |
| 2026-06-20 00:00 |
04:57:42.69 |
+12:55:43.5 |
HIP 23085 |
8.62 |
| 2026-06-20 12:00 |
04:57:43.50 |
+12:55:44.2 |
HIP 23085 |
8.48 |
| 2026-06-21 00:00 |
04:57:44.31 |
+12:55:44.9 |
HIP 23085 |
8.34 |
| 2026-06-21 12:00 |
04:57:45.12 |
+12:55:45.6 |
HIP 23085 |
8.21 |
| 2026-06-22 00:00 |
04:57:45.93 |
+12:55:46.3 |
HIP 23085 |
8.07 |